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<p><a href="http://www.w3.org/"><img width="72" height="48" alt=
"W3C" src="http://www.w3.org/Icons/w3c_home" /></a></p>
<h1><a id="title" name="title"></a>XML Syntax for XQuery 1.0
(XQueryX) (Second Edition)</h1>
<h2><a id="w3c-doctype" name="w3c-doctype"></a>W3C Recommendation
14 December 2010</h2>
<dl>
<dt>This version:</dt>
<dd><a href=
"http://www.w3.org/TR/2010/REC-xqueryx-20101214/">http://www.w3.org/TR/2010/REC-xqueryx-20101214/</a></dd>
<dt>Latest version:</dt>
<dd><a href=
"http://www.w3.org/TR/xqueryx/">http://www.w3.org/TR/xqueryx/</a></dd>
<dt>Previous versions:</dt>
<dd><a href=
"http://www.w3.org/TR/2009/PER-xqueryx-20090421/">http://www.w3.org/TR/2009/PER-xqueryx-20090421/,</a>
<a href=
"http://www.w3.org/TR/2007/REC-xqueryx-20070123/">http://www.w3.org/TR/2007/REC-xqueryx-20070123/</a></dd>
<dt>Editors:</dt>
<dd>Jim Melton, Oracle <a href=
"mailto:jim.melton@oracle.com">&lt;jim.melton@oracle.com&gt;</a></dd>
<dd>Subramanian Muralidhar, Microsoft</dd>
</dl>
<p>Please refer to the <a href=
"http://www.w3.org/XML/2010/qt-errata/xqueryx-errata2e.html"><strong>
errata</strong></a> for this document, which may include some
normative corrections.</p>
<p>See also <a href=
"http://www.w3.org/2003/03/Translations/byTechnology?technology=xqueryx">
<strong>translations</strong></a>.</p>
<p>This document is also available in these non-normative formats:
<a href=
"http://www.w3.org/TR/2010/REC-xqueryx-20101214/xqueryx-20101214.xml">
XML</a> and&#160;<a href=
"http://www.w3.org/TR/2010/REC-xqueryx-20101214/xqueryx-diff-from-REC20070123.html">Change
markings relative to first edition</a>.</p>
<p class="copyright"><a href=
"http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">Copyright</a>&#160;©&#160;2010&#160;<a href="http://www.w3.org/"><acronym title="World Wide Web Consortium">W3C</acronym></a><sup>®</sup>
(<a href="http://www.csail.mit.edu/"><acronym title=
"Massachusetts Institute of Technology">MIT</acronym></a>, <a href=
"http://www.ercim.eu/"><acronym title=
"European Research Consortium for Informatics and Mathematics">ERCIM</acronym></a>,
<a href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved.
W3C <a href=
"http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">liability</a>,
<a href=
"http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">trademark</a>
and <a href=
"http://www.w3.org/Consortium/Legal/copyright-documents">document
use</a> rules apply.</p>
</div>
<hr />
<div>
<h2><a id="abstract" name="abstract"></a>Abstract</h2>
<p>This document defines an XML Syntax for <a href=
"#xquery">[XQuery 1.0: An XML Query Language (Second
Edition)]</a>.</p>
</div>
<div>
<h2><a id="status" name="status"></a>Status of this Document</h2>
<p><em>This section describes the status of this document at the
time of its publication. Other documents may supersede this
document. A list of current W3C publications and the latest
revision of this technical report can be found in the <a href=
"http://www.w3.org/TR/">W3C technical reports index</a> at
http://www.w3.org/TR/.</em></p>
<p>This is one document in a set of eight documents that are being
progressed to Edited Recommendation together (XPath 2.0, XQuery
1.0, XQueryX 1.0, XSLT 2.0, Data Model (XDM), Functions and
Operators, Formal Semantics, Serialization).</p>
<p>This document, published on 14 December 2010, is an Edited
<a href=
"http://www.w3.org/2004/02/Process-20040205/tr.html#RecsW3C">Recommendation</a>
of the W3C. It supersedes the previous W3C Recommendation of 23
January 2007. This second edition is not a new version of this
specification; its purpose is to clarify a number of issues that
have become apparent since the first edition was published. All of
these clarifications (excepting trivial editorial fixes) have been
published in a separate errata document, and published in a
<a href="http://www.w3.org/2004/02/Process-20040205/tr.html#ProposedEditedRec">
Proposed Edited Recommendation</a> in April 2009. The changes are
summarized in an appendix. This document has been developed by the
W3C <a href="http://www.w3.org/XML/Query/">XML Query Working
Group</a>, which is part of the <a href=
"http://www.w3.org/XML/Activity">XML Activity</a>.</p>
<p>This document has been reviewed by W3C Members, by software
developers, and by other W3C groups and interested parties, and is
endorsed by the Director as a W3C Recommendation. It is a stable
document and may be used as reference material or cited from
another document. W3C's role in making the Recommendation is to
draw attention to the specification and to promote its widespread
deployment. This enhances the functionality and interoperability of
the Web.</p>
<p>This document incorporates changes made against the <a href=
"http://www.w3.org/2004/02/Process-20040205/tr.html#RecsW3C">Recommendation</a>
of 23 January 2007 that resolve all errata known at the date of
publication. Changes to this document since the first edition are
detailed in the <a href="#changelog"><b>D Changes since the First
Edition</b></a>. This document supersedes the <a href=
"http://www.w3.org/TR/2007/REC-xqueryx-20070123/">first
edition</a>.</p>
<p>An implementation report is available at <a href=
"http://www.w3.org/XML/Query/test-suite/XQTSReport.html">http://www.w3.org/XML/Query/test-suite/XQTSReport.html</a>.</p>
<p>Please report errors in and submit comments on this document
using W3C's <a href="http://www.w3.org/Bugs/Public/">public
Bugzilla system</a> (instructions can be found at <a href=
"http://www.w3.org/XML/2005/04/qt-bugzilla">http://www.w3.org/XML/2005/04/qt-bugzilla</a>).
If access to that system is not feasible, you may send your
comments to the W3C XSLT/XPath/XQuery public comments mailing list,
<a href=
"mailto:public-qt-comments@w3.org">public-qt-comments@w3.org</a>.
It will be very helpful if you include the string “[XQX]” in the
subject line of your report, whether made in Bugzilla or in email.
Each Bugzilla entry and email message should contain only one error
report. Archives of the comments and responses are available at
<a href=
"http://lists.w3.org/Archives/Public/public-qt-comments/">http://lists.w3.org/Archives/Public/public-qt-comments/</a>.</p>
<p>This document was produced by a group operating under the
<a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5
February 2004 W3C Patent Policy</a>. W3C maintains a <a href=
"http://www.w3.org/2004/01/pp-impl/18797/status#disclosures">public
list of any patent disclosures</a> made in connection with the
deliverables of the group; that page also includes instructions for
disclosing a patent. An individual who has actual knowledge of a
patent which the individual believes contains <a href=
"http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">
Essential Claim(s)</a> must disclose the information in accordance
with <a href=
"http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">
section 6 of the W3C Patent Policy</a>.</p>
</div>
<div class="toc">
<h2><a id="contents" name="contents"></a>Table of Contents</h2>
<p class="toc">1 <a href="#Introduction">Introduction</a><br />
2 <a href="#Mapping">Mapping the XQuery Syntax</a><br />
3 <a href="#Examples">Examples from the XML Query Use Cases in XML
Syntax</a><br />
&#160;&#160;&#160;&#160;3.1 <a href="#Example1">Example 1</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.1.1 <a href=
"#Example1-XQuery">XQuery solution in XQuery Use Cases:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.1.2 <a href=
"#Example1-XQueryX">A Solution in XQueryX:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.1.3 <a href=
"#Example1-Transformation">Transformation of XQueryX Solution into
XQuery</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.1.4 <a href=
"#Example1-Abstract">Corresponding Grammar Abstract Parse
Tree</a><br />
&#160;&#160;&#160;&#160;3.2 <a href="#Example2">Example 2</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.2.1 <a href=
"#Example2-XQuery">XQuery solution in XQuery Use Cases:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.2.2 <a href=
"#Example2-XQueryX">A solution in XQueryX:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.2.3 <a href=
"#Example2-Transformation">Transformation of XQueryX Solution into
XQuery</a><br />
&#160;&#160;&#160;&#160;3.3 <a href="#Example3">Example 3</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.3.1 <a href=
"#Example3-XQuery">XQuery solution in XQuery Use Cases:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.3.2 <a href=
"#Example3-XQueryX">A solution in XQueryX:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.3.3 <a href=
"#Example3-Transformation">Transformation of XQueryX Solution into
XQuery</a><br />
&#160;&#160;&#160;&#160;3.4 <a href="#Example4">Example 4</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.4.1 <a href=
"#Example4-XQuery">XQuery solution in XQuery Use Cases:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.4.2 <a href=
"#Example4-XQueryX">A solution in XQueryX:</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;3.4.3 <a href=
"#Example4-Transformation">Transformation of XQueryX Solution into
XQuery</a><br />
4 <a href="#Schema">An XML Schema for the XQuery XML
Syntax</a><br />
5 <a href="#xqx_conformance">Conformance</a><br /></p>
<h3><a id="appendices" name="appendices"></a>Appendices</h3>
<p class="toc">A <a href="#biblio">References</a><br />
B <a href="#Stylesheet">Transforming XQueryX to XQuery</a><br />
C <a href="#xqueryx-id-mime-type">The application/xquery+xml Media
Type</a><br />
&#160;&#160;&#160;&#160;C.1 <a href=
"#xqueryx-mime-introduction">Introduction</a><br />
&#160;&#160;&#160;&#160;C.2 <a href=
"#xqueryx-mime-registration">Registration of MIME Media Type
application/xquery+xml</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.1 <a href=
"#xqueryx-mime-encoding">Encoding Considerations</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.2 <a href=
"#xqueryx-mime-security">Security Considerations</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.3 <a href=
"#xqueryx-mime-interoperability">Interoperability
Considerations</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.4 <a href=
"#xqueryx-mime-pubspec">Published specification</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.5 <a href=
"#xqueryx-mime-applications">Applications That Use This Media
Type</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.6 <a href=
"#xqueryx-mime-additional">Additional Information</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.6.1
<a href="#xqueryx-mime-recognizing">Recognizing XQuery Files
("Magic Numbers")</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.6.2
<a href="#xqueryx-mime-extensions">File Extensions</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.6.3
<a href="#xqueryx-mime-macfiletype">Macintosh File Type
Code(s)</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.7 <a href=
"#xqueryx-mime-author">Person and Email Address to Contact For
Further Information</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.8 <a href=
"#xqueryx-mime-intended-usage">Intended Usage</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.9 <a href=
"#xqueryx-mime-restrictions">Restrictions on usage</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.10 <a href=
"#xqueryx-mime-owner">Author/Change Controller</a><br />
&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;C.2.11 <a href=
"#xqueryx-mime-fragments">Fragment Identifiers</a><br />
D <a href="#changelog">Changes since the First Edition</a>
(Non-Normative)<br /></p>
</div>
<hr />
<div class="body">
<div class="div1">
<h2><a id="Introduction" name="Introduction"></a>1
Introduction</h2>
<p>The <a href="#xquery-requirements">[XML Query 1.0
Requirements]</a> states that "The XML Query Language MAY have more
than one syntax binding. One query language syntax MUST be
convenient for humans to read and write. One query language syntax
MUST be expressed in XML in a way that reflects the underlying
structure of the query."</p>
<p>XQueryX is an XML representation of an XQuery. It was created by
mapping the productions of the XQuery grammar into XML productions.
The result is not particularly convenient for humans to read and
write, but it is easy for programs to parse, and because XQueryX is
represented in XML, standard XML tools can be used to create,
interpret, or modify queries.</p>
<p>In this document, examples and material labeled as "Note" are
provided for explanatory purposes and are not normative.</p>
<div class="note">
<p class="prefix"><b>Note:</b></p>
<p>Because the two syntaxes are merely different grammars that
express the same query semantics, they share all aspects of an
XQuery processing system except for the component that recognizes
and translates the source representation of a query (that is, the
parser). The aspects that are shared include both the static
context and the dynamic context that are defined in <a href=
"#xquery">[XQuery 1.0: An XML Query Language (Second
Edition)]</a>.</p>
</div>
<p>There are several environments in which XQueryX may be
useful:</p>
<ul>
<li>
<p><em>Parser Reuse.</em> In heterogeneous environments, a variety
of systems may be used to execute a query. One parser can generate
XQueryX for all of these systems.</p>
</li>
<li>
<p><em>Queries on Queries.</em> Because XQueryX is represented in
XML, queries can be queried and can be transformed into new
queries. For instance, a query can be performed against a set of
XQueryX queries to determine which queries use FLWOR expressions to
range over a set of invoices.</p>
</li>
<li>
<p><em>Generating Queries.</em> In some XML-oriented programming
environments, it may be more convenient to build a query in its
XQueryX representation than in the corresponding XQuery
representation, since ordinary XML tools can be used.</p>
</li>
<li>
<p><em>Embedding Queries in XML.</em> XQueryX can be embedded
directly in an XML document.</p>
</li>
</ul>
<p>The most recent versions of the XQueryX XML Schema and the
XQueryX XSLT stylesheet are available at <a href=
"http://www.w3.org/2005/XQueryX/xqueryx.xsd">http://www.w3.org/2005/XQueryX/xqueryx.xsd</a>
and <a href=
"http://www.w3.org/2005/XQueryX/xqueryx.xsl">http://www.w3.org/2005/XQueryX/xqueryx.xsl</a>,
respectively.</p>
</div>
<div class="div1">
<h2><a id="Mapping" name="Mapping"></a>2 Mapping the XQuery
Syntax</h2>
<p>XQueryX is an XML representation of the abstract syntax found in
Appendix A of <a href="#xquery">[XQuery 1.0: An XML Query Language
(Second Edition)]</a>. The XQueryX syntax is defined by the XQueryX
Schema, which is specified in <a href="#Schema"><b>4 An XML Schema
for the XQuery XML Syntax</b></a>. The XQueryX semantics are
defined by a stylesheet that maps an instance of XQueryX to an
instance of XQuery; see <a href="#Stylesheet"><b>B Transforming
XQueryX to XQuery</b></a>.</p>
<p>The main data structure in the XQueryX Schema is the set of
types that describe expressions. We have chosen to model
expressions using substitution groups, with an "expr" abstract base
class and a number of intermediate abstract classes.</p>
<p>Consider the following productions from the abstract syntax:</p>
<div class="exampleInner">
<pre>

FLWORExpr    ::=    (ForClause  | LetClause)+ WhereClause? OrderByClause? "return" ExprSingle 
ForClause    ::=    "for" "$" VarName TypeDeclaration? PositionalVar? "in" 
                    ExprSingle ("," "$" VarName TypeDeclaration? PositionalVar? 
                    "in" ExprSingle)* 
LetClause    ::=    "let" "$" VarName TypeDeclaration? ":=" ExprSingle
                    ("," "$" VarName TypeDeclaration? ":=" ExprSingle)*
WhereClause  ::=    "where" ExprSingle
</pre></div>
<p>The following XQueryX Schema definitions reflect the structure
of those productions from that abstract syntax:</p>
<div class="exampleInner">
<pre>


  
&lt;!-- The base class --&gt;
  &lt;xsd:complexType name="expr"/&gt;
  &lt;xsd:element name="expr" type="expr" abstract="true"/&gt;
  
  &lt;!-- Simple wrapper class --&gt;
  &lt;xsd:complexType name="exprWrapper"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="expr"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;
  
  &lt;xsd:complexType name="flworExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:choice maxOccurs="unbounded"&gt;
            &lt;xsd:element ref="forClause"/&gt;
            &lt;xsd:element ref="letClause"/&gt;
          &lt;/xsd:choice&gt;
          &lt;xsd:element name="whereClause" minOccurs="0"/&gt;
          &lt;xsd:element name="orderByClause" minOccurs="0"/&gt;
          &lt;xsd:element name="returnClause"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="flworExpr" type="flworExpr" substitutionGroup="expr"/&gt;

  &lt;xsd:element name="forClause"&gt;
    &lt;xsd:complexType&gt;
      &lt;xsd:sequence&gt;
        &lt;xsd:element ref="forClauseItem" maxOccurs="unbounded"/&gt;
      &lt;/xsd:sequence&gt;
    &lt;/xsd:complexType&gt;
  &lt;/xsd:element&gt;

  &lt;xsd:element name="forClauseItem"&gt;
    &lt;xsd:complexType&gt;
      &lt;xsd:sequence&gt;
        &lt;xsd:element ref="typedVariableBinding"/&gt;
        &lt;xsd:element ref="positionalVariableBinding" minOccurs="0"/&gt;
        &lt;xsd:element name="forExpr" type="exprWrapper"/&gt;
      &lt;/xsd:sequence&gt;
    &lt;/xsd:complexType&gt;
  &lt;/xsd:element&gt;

  &lt;xsd:element name="letClause"&gt;
    &lt;xsd:complexType&gt;
      &lt;xsd:sequence&gt;
        &lt;xsd:element ref="letClauseItem" maxOccurs="unbounded"/&gt;
      &lt;/xsd:sequence&gt;
    &lt;/xsd:complexType&gt;
  &lt;/xsd:element&gt;

  &lt;xsd:element name="letClauseItem"&gt;
    &lt;xsd:complexType&gt;
      &lt;xsd:sequence&gt;
        &lt;xsd:element ref="typedVariableBinding"/&gt;
        &lt;xsd:element name="letExpr" type="exprWrapper"/&gt;
      &lt;/xsd:sequence&gt;
    &lt;/xsd:complexType&gt;
  &lt;/xsd:element&gt;

  &lt;xsd:element name="whereClause" type="exprWrapper"/&gt;

  &lt;xsd:element name="returnClause" type="exprWrapper"/&gt;
</pre></div>
<p>Since XQuery uses the expression production liberally to allow
expressions to be flexibly combined, XQueryX uses the exprWrapper
type in embedded contexts to allow all expression types to
occur.</p>
</div>
<div class="div1">
<h2><a id="Examples" name="Examples"></a>3 Examples from the XML
Query Use Cases in XML Syntax</h2>
<p>Three of following examples are based on the data and queries in
the XMP (Experiences and Exemplars) use case in <a href=
"#xquery-use-cases">[XML Query Use Cases]</a>, while a fourth
example is based on the data and queries in the NS (Queries Using
Namespaces) use case. For each example, we show the English
description of the query, the XQuery solution given in <a href=
"#xquery-use-cases">[XML Query Use Cases]</a>, an XQueryX solution,
and the XQuery that results from applying the XQueryX-to-XQuery
transformation defined by the stylesheet in <a href=
"#Stylesheet"><b>B Transforming XQueryX to XQuery</b></a> to the
XQueryX solution. That produced XQuery is presented only as a
sanity-check — the intent of the stylesheet is not to create the
identical XQuery expression given in <a href=
"#xquery-use-cases">[XML Query Use Cases]</a>, but to produce
<em>a</em> valid XQuery expression with the same semantics. The
semantics of the XQueryX solution are determined by the semantics
of the XQuery expression that results from that transformation. The
"correctness" of that transformation is determined by asking the
following the question: Can some XQueryX processor QX process some
XQueryX document D1 to produce results R1, after which the
stylesheet is used to translate D1 into an XQuery expression E1
that, when processed by some XQuery processor Q, produces results
R2 that are equivalent (under some meaningful definition of
"equivalent") to results R1?</p>
<p>Comparison of the results of the XQueryX-to-XQuery
transformation given in this document with the XQuery solutions in
the <a href="#xquery-use-cases">[XML Query Use Cases]</a> may be
helpful in evaluating the correctness of the XQueryX solution in
each example.</p>
<p>The XQuery Use Cases solution given for each example is provided
only to assist readers of this document in understanding the
XQueryX solution. There is no intent to imply that this document
specifies a "compilation" or "transformation" of XQuery syntax into
XQueryX syntax.</p>
<p>In the following examples, note that path expressions are
expanded to show their structure. Also, note that the prefix syntax
for binary operators like "and" makes the precedence explicit. In
general, humans find it easier to read an XML representation that
does not expand path expressions, but it is less convenient for
programmatic representation and manipulation. XQueryX is designed
as a language that is convenient for production and modification by
software, and not as a convenient syntax for humans to read and
write.</p>
<p>Finally, please note that white space, including new lines, have
been added to some of the XQueryX documents and XQuery expressions
for readability. That additional white space is not produced by the
XQueryX-to-XQuery transformation.</p>
<div class="div2">
<h3><a id="Example1" name="Example1"></a>3.1 Example 1</h3>
<p>Here is Q1 from the <a href="#xquery-use-cases">[XML Query Use
Cases]</a>, use case XMP (Experiences and Exemplars): "List books
published by Addison-Wesley after 1991, including their year and
title."</p>
<div class="div3">
<h4><a id="Example1-XQuery" name="Example1-XQuery"></a>3.1.1 XQuery
solution in XQuery Use Cases:</h4>
<div class="exampleInner">
<pre>
&lt;bib&gt;
 {
  for $b in doc("http://bstore1.example.com/bib.xml")/bib/book
  where $b/publisher = "Addison-Wesley" and $b/@year &gt; 1991
  return
    &lt;book year="{ $b/@year }"&gt;
     { $b/title }
    &lt;/book&gt;
 }
&lt;/bib&gt;
</pre></div>
</div>
<div class="div3">
<h4><a id="Example1-XQueryX" name="Example1-XQueryX"></a>3.1.2 A
Solution in XQueryX:</h4>
<div class="exampleInner">
<pre>
&lt;?xml version="1.0"?&gt;
&lt;xqx:module xmlns:xqx="http://www.w3.org/2005/XQueryX"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.w3.org/2005/XQueryX
                                http://www.w3.org/2005/XQueryX/xqueryx.xsd"&gt;
  &lt;xqx:mainModule&gt;
    &lt;xqx:queryBody&gt;
      &lt;xqx:elementConstructor&gt;
        &lt;xqx:tagName&gt;bib&lt;/xqx:tagName&gt;
        &lt;xqx:elementContent&gt;
          &lt;xqx:flworExpr&gt;
            &lt;xqx:forClause&gt;
              &lt;xqx:forClauseItem&gt;
                &lt;xqx:typedVariableBinding&gt;
                  &lt;xqx:varName&gt;b&lt;/xqx:varName&gt;
                &lt;/xqx:typedVariableBinding&gt;
                &lt;xqx:forExpr&gt;
                  &lt;xqx:pathExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:filterExpr&gt;
                        &lt;xqx:functionCallExpr&gt;
                          &lt;xqx:functionName&gt;doc&lt;/xqx:functionName&gt;
                          &lt;xqx:arguments&gt;
                            &lt;xqx:stringConstantExpr&gt;
                              &lt;xqx:value&gt;http://bstore1.example.com/bib.xml&lt;/xqx:value&gt;
                            &lt;/xqx:stringConstantExpr&gt;
                          &lt;/xqx:arguments&gt;
                        &lt;/xqx:functionCallExpr&gt;
                      &lt;/xqx:filterExpr&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:nameTest&gt;bib&lt;/xqx:nameTest&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:nameTest&gt;book&lt;/xqx:nameTest&gt;
                    &lt;/xqx:stepExpr&gt;
                  &lt;/xqx:pathExpr&gt;
                &lt;/xqx:forExpr&gt;
              &lt;/xqx:forClauseItem&gt;
            &lt;/xqx:forClause&gt;
            &lt;xqx:whereClause&gt;
              &lt;xqx:andOp&gt;
                &lt;xqx:firstOperand&gt;
                  &lt;xqx:equalOp&gt;
                    &lt;xqx:firstOperand&gt;
                      &lt;xqx:pathExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:filterExpr&gt;
                            &lt;xqx:varRef&gt;
                              &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                            &lt;/xqx:varRef&gt;
                          &lt;/xqx:filterExpr&gt;
                        &lt;/xqx:stepExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                          &lt;xqx:nameTest&gt;publisher&lt;/xqx:nameTest&gt;
                        &lt;/xqx:stepExpr&gt;
                      &lt;/xqx:pathExpr&gt;
                    &lt;/xqx:firstOperand&gt;
                    &lt;xqx:secondOperand&gt;
                      &lt;xqx:stringConstantExpr&gt;
                        &lt;xqx:value&gt;Addison-Wesley&lt;/xqx:value&gt;
                      &lt;/xqx:stringConstantExpr&gt;
                    &lt;/xqx:secondOperand&gt;
                  &lt;/xqx:equalOp&gt;
                &lt;/xqx:firstOperand&gt;
                &lt;xqx:secondOperand&gt;
                  &lt;xqx:greaterThanOp&gt;
                    &lt;xqx:firstOperand&gt;
                      &lt;xqx:pathExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:filterExpr&gt;
                            &lt;xqx:varRef&gt;
                              &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                            &lt;/xqx:varRef&gt;
                          &lt;/xqx:filterExpr&gt;
                        &lt;/xqx:stepExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:xpathAxis&gt;attribute&lt;/xqx:xpathAxis&gt;
                          &lt;xqx:nameTest&gt;year&lt;/xqx:nameTest&gt;
                        &lt;/xqx:stepExpr&gt;
                      &lt;/xqx:pathExpr&gt;
                    &lt;/xqx:firstOperand&gt;
                    &lt;xqx:secondOperand&gt;
                      &lt;xqx:integerConstantExpr&gt;
                        &lt;xqx:value&gt;1991&lt;/xqx:value&gt;
                      &lt;/xqx:integerConstantExpr&gt;
                    &lt;/xqx:secondOperand&gt;
                  &lt;/xqx:greaterThanOp&gt;
                &lt;/xqx:secondOperand&gt;
              &lt;/xqx:andOp&gt;
            &lt;/xqx:whereClause&gt;
            &lt;xqx:returnClause&gt;
              &lt;xqx:elementConstructor&gt;
                &lt;xqx:tagName&gt;book&lt;/xqx:tagName&gt;
                &lt;xqx:attributeList&gt;
                  &lt;xqx:attributeConstructor&gt;
                    &lt;xqx:attributeName&gt;year&lt;/xqx:attributeName&gt;
                    &lt;xqx:attributeValueExpr&gt;
                      &lt;xqx:pathExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:filterExpr&gt;
                            &lt;xqx:varRef&gt;
                              &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                            &lt;/xqx:varRef&gt;
                          &lt;/xqx:filterExpr&gt;
                        &lt;/xqx:stepExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:xpathAxis&gt;attribute&lt;/xqx:xpathAxis&gt;
                          &lt;xqx:nameTest&gt;year&lt;/xqx:nameTest&gt;
                        &lt;/xqx:stepExpr&gt;
                      &lt;/xqx:pathExpr&gt;
                    &lt;/xqx:attributeValueExpr&gt;
                  &lt;/xqx:attributeConstructor&gt;
                &lt;/xqx:attributeList&gt;
                &lt;xqx:elementContent&gt;
                  &lt;xqx:pathExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:filterExpr&gt;
                        &lt;xqx:varRef&gt;
                          &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                        &lt;/xqx:varRef&gt;
                      &lt;/xqx:filterExpr&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:nameTest&gt;title&lt;/xqx:nameTest&gt;
                    &lt;/xqx:stepExpr&gt;
                  &lt;/xqx:pathExpr&gt;
                &lt;/xqx:elementContent&gt;
              &lt;/xqx:elementConstructor&gt;
            &lt;/xqx:returnClause&gt;
          &lt;/xqx:flworExpr&gt;
        &lt;/xqx:elementContent&gt;
      &lt;/xqx:elementConstructor&gt;
    &lt;/xqx:queryBody&gt;
  &lt;/xqx:mainModule&gt;
&lt;/xqx:module&gt;
</pre></div>
</div>
<div class="div3">
<h4><a id="Example1-Transformation" name=
"Example1-Transformation"></a>3.1.3 Transformation of XQueryX
Solution into XQuery</h4>
<p>Application of the stylesheet in <a href="#Stylesheet"><b>B
Transforming XQueryX to XQuery</b></a> to the XQueryX solution
results in:</p>
<div class="exampleInner">
<pre>
  
&lt;bib&gt;{
 for $b in doc("http://bstore1.example.com/bib.xml")/child::bib/child::book
 where (($b/child::publisher = "Addison-Wesley") and ($b/attribute::year &gt; 1991))
 return &lt;book year="{$b/attribute::year}"&gt;{$b/child::title}&lt;/book&gt;
}&lt;/bib&gt;
</pre></div>
</div>
<div class="div3">
<h4><a id="Example1-Abstract" name="Example1-Abstract"></a>3.1.4
Corresponding Grammar Abstract Parse Tree</h4>
<p>For comparison, here is the abstract parse tree corresponding to
the XQuery for Example 1, as produced by the XQuery grammar applets
found at <a href=
"http://www.w3.org/2007/01/applets/">http://www.w3.org/2007/01/applets/</a>.</p>
<div class="exampleInner">
<pre>
XPath2
  QueryList
    Module
      MainModule
        Prolog
        QueryBody
          Expr
            PathExpr
              Constructor
                DirectConstructor
                  DirElemConstructor &gt;
                    LessThanOpOrTagO &lt;
                    TagQName bib
                    DirAttributeList
                    StartTagClose &gt;
                    DirElemContent
                      ElementContentChar 
                    DirElemContent
                      ElementContentChar  
                    DirElemContent
                      CommonContent
                        EnclosedExpr
                          Lbrace {
                          Expr
                            FLWORExpr
                              ForClause
                                VarName
                                  QName b
                                PathExpr
                                  FunctionCall
                                    FunctionQName doc
                                    PathExpr
                                      StringLiteral "http://bstore1.example.com/bib.xml"
                                  StepExpr
                                    AbbrevForwardStep
                                      NodeTest
                                        NameTest
                                          QName bib
                                  StepExpr
                                    AbbrevForwardStep
                                      NodeTest
                                        NameTest
                                          QName book
                              WhereClause
                                AndExpr and
                                  ComparisonExpr =
                                    PathExpr
                                      VarName
                                        QName b
                                      StepExpr
                                        AbbrevForwardStep
                                          NodeTest
                                            NameTest
                                              QName publisher
                                    PathExpr
                                      StringLiteral "Addison-Wesley"
                                  ComparisonExpr &gt;
                                    PathExpr
                                      VarName
                                        QName b
                                      StepExpr
                                        AbbrevForwardStep @
                                          NodeTest
                                            NameTest
                                              QName year
                                    PathExpr
                                      IntegerLiteral 1991
                              PathExpr
                                Constructor
                                  DirectConstructor
                                    DirElemConstructor &gt;
                                      LessThanOpOrTagO &lt;
                                      TagQName book
                                      DirAttributeList
                                        S  
                                        TagQName year
                                        ValueIndicator =
                                        DirAttributeValue
                                          OpenQuot "
                                          QuotAttrValueContent
                                            CommonContent
                                              EnclosedExpr
                                                Lbrace {
                                                Expr
                                                  PathExpr
                                                    VarName
                                                      QName b
                                                    StepExpr
                                                      AbbrevForwardStep @
                                                        NodeTest
                                                          NameTest
                                                            QName year
                                                Rbrace }
                                          CloseQuot "
                                      StartTagClose &gt;
                                      DirElemContent
                                        ElementContentChar 
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent
                                        CommonContent
                                          EnclosedExpr
                                            Lbrace {
                                            Expr
                                              PathExpr
                                                VarName
                                                  QName b
                                                StepExpr
                                                  AbbrevForwardStep
                                                    NodeTest
                                                      NameTest
                                                        QName title
                                            Rbrace }
                                      DirElemContent
                                        ElementContentChar 
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent
                                        ElementContentChar  
                                      DirElemContent &lt;/
                                        ElementContentChar  
                          Rbrace }
                    DirElemContent &lt;/
                      ElementContentChar 
</pre></div>
</div>
</div>
<div class="div2">
<h3><a id="Example2" name="Example2"></a>3.2 Example 2</h3>
<p>Here is Q4 from the <a href="#xquery-use-cases">[XML Query Use
Cases]</a>, use case XMP (Experiences and Exemplars): "For each
author in the bibliography, list the author's name and the titles
of all books by that author, grouped inside a "result"
element."</p>
<div class="div3">
<h4><a id="Example2-XQuery" name="Example2-XQuery"></a>3.2.1 XQuery
solution in XQuery Use Cases:</h4>
<div class="exampleInner">
<pre>
&lt;results&gt;
  {
    let $a := doc("http://bstore1.example.com/bib/bib.xml")//author
    for $last in distinct-values($a/last),
        $first in distinct-values($a[last=$last]/first)
    order by $last, $first
    return
        &lt;result&gt;
            &lt;author&gt;
               &lt;last&gt;{ $last }&lt;/last&gt;
               &lt;first&gt;{ $first }&lt;/first&gt;
            &lt;/author&gt;
            {
                for $b in doc("http://bstore1.example.com/bib.xml")/bib/book
                where some $ba in $b/author 
                      satisfies ($ba/last = $last and $ba/first=$first)
                return $b/title
            }
        &lt;/result&gt;
  }
&lt;/results&gt; 
</pre></div>
</div>
<div class="div3">
<h4><a id="Example2-XQueryX" name="Example2-XQueryX"></a>3.2.2 A
solution in XQueryX:</h4>
<div class="exampleInner">
<pre>
&lt;?xml version="1.0"?&gt;
&lt;xqx:module xmlns:xqx="http://www.w3.org/2005/XQueryX"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.w3.org/2005/XQueryX
                          http://www.w3.org/2005/XQueryX/xqueryx.xsd"&gt;
  &lt;xqx:mainModule&gt;
    &lt;xqx:queryBody&gt;
      &lt;xqx:elementConstructor&gt;
        &lt;xqx:tagName&gt;results&lt;/xqx:tagName&gt;
        &lt;xqx:elementContent&gt;
          &lt;xqx:flworExpr&gt;
            &lt;xqx:letClause&gt;
              &lt;xqx:letClauseItem&gt;
                &lt;xqx:typedVariableBinding&gt;
                  &lt;xqx:varName&gt;a&lt;/xqx:varName&gt;
                &lt;/xqx:typedVariableBinding&gt;
                &lt;xqx:letExpr&gt;
                 &lt;xqx:pathExpr&gt;
                   &lt;xqx:stepExpr&gt;
                     &lt;xqx:filterExpr&gt;
                       &lt;xqx:functionCallExpr&gt;
                         &lt;xqx:functionName&gt;doc&lt;/xqx:functionName&gt;
                         &lt;xqx:arguments&gt;
                           &lt;xqx:stringConstantExpr&gt;
                             &lt;xqx:value&gt;http://bstore1.example.com/bib.xml&lt;/xqx:value&gt;
                           &lt;/xqx:stringConstantExpr&gt;
                         &lt;/xqx:arguments&gt;
                       &lt;/xqx:functionCallExpr&gt;
                     &lt;/xqx:filterExpr&gt;
                   &lt;/xqx:stepExpr&gt;
                   &lt;xqx:stepExpr&gt;
                     &lt;xqx:xpathAxis&gt;descendant-or-self&lt;/xqx:xpathAxis&gt;
                     &lt;xqx:anyKindTest/&gt;
                   &lt;/xqx:stepExpr&gt;
                   &lt;xqx:stepExpr&gt;
                     &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                     &lt;xqx:nameTest&gt;author&lt;/xqx:nameTest&gt;
                   &lt;/xqx:stepExpr&gt;
                 &lt;/xqx:pathExpr&gt;
                &lt;/xqx:letExpr&gt;
              &lt;/xqx:letClauseItem&gt;
            &lt;/xqx:letClause&gt;
            &lt;xqx:forClause&gt;
              &lt;xqx:forClauseItem&gt;
                &lt;xqx:typedVariableBinding&gt;
                  &lt;xqx:varName&gt;last&lt;/xqx:varName&gt;
                &lt;/xqx:typedVariableBinding&gt;
                &lt;xqx:forExpr&gt;
                  &lt;xqx:functionCallExpr&gt;
                    &lt;xqx:functionName&gt;distinct-values&lt;/xqx:functionName&gt;
                    &lt;xqx:arguments&gt;
                      &lt;xqx:pathExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:filterExpr&gt;
                            &lt;xqx:varRef&gt;
                              &lt;xqx:name&gt;a&lt;/xqx:name&gt;
                            &lt;/xqx:varRef&gt;
                          &lt;/xqx:filterExpr&gt;
                        &lt;/xqx:stepExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                          &lt;xqx:nameTest&gt;last&lt;/xqx:nameTest&gt;
                        &lt;/xqx:stepExpr&gt;
                      &lt;/xqx:pathExpr&gt;
                    &lt;/xqx:arguments&gt;
                  &lt;/xqx:functionCallExpr&gt;
                &lt;/xqx:forExpr&gt;
              &lt;/xqx:forClauseItem&gt;
              &lt;xqx:forClauseItem&gt;
                &lt;xqx:typedVariableBinding&gt;
                  &lt;xqx:varName&gt;first&lt;/xqx:varName&gt;
                &lt;/xqx:typedVariableBinding&gt;
                &lt;xqx:forExpr&gt;
                  &lt;xqx:functionCallExpr&gt;
                    &lt;xqx:functionName&gt;distinct-values&lt;/xqx:functionName&gt;
                    &lt;xqx:arguments&gt;
                      &lt;xqx:pathExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:filterExpr&gt;
                            &lt;xqx:varRef&gt;
                              &lt;xqx:name&gt;a&lt;/xqx:name&gt;
                            &lt;/xqx:varRef&gt;
                          &lt;/xqx:filterExpr&gt;
                          &lt;xqx:predicates&gt;
                            &lt;xqx:equalOp&gt;
                              &lt;xqx:firstOperand&gt;
                                &lt;xqx:pathExpr&gt;
                                  &lt;xqx:stepExpr&gt;
                                    &lt;xqx:filterExpr&gt;
                                      &lt;xqx:contextItemExpr/&gt;
                                    &lt;/xqx:filterExpr&gt;
                                  &lt;/xqx:stepExpr&gt;
                                  &lt;xqx:stepExpr&gt;
                                    &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                    &lt;xqx:nameTest&gt;last&lt;/xqx:nameTest&gt;
                                  &lt;/xqx:stepExpr&gt;
                                &lt;/xqx:pathExpr&gt;
                              &lt;/xqx:firstOperand&gt;
                              &lt;xqx:secondOperand&gt;
                                &lt;xqx:varRef&gt;
                                  &lt;xqx:name&gt;last&lt;/xqx:name&gt;
                                &lt;/xqx:varRef&gt;
                              &lt;/xqx:secondOperand&gt;
                            &lt;/xqx:equalOp&gt;
                          &lt;/xqx:predicates&gt;
                        &lt;/xqx:stepExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                          &lt;xqx:nameTest&gt;first&lt;/xqx:nameTest&gt;
                        &lt;/xqx:stepExpr&gt;
                      &lt;/xqx:pathExpr&gt;
                    &lt;/xqx:arguments&gt;
                  &lt;/xqx:functionCallExpr&gt;
                &lt;/xqx:forExpr&gt;
              &lt;/xqx:forClauseItem&gt;
            &lt;/xqx:forClause&gt;
            &lt;xqx:orderByClause&gt;
              &lt;xqx:orderBySpec&gt;
                &lt;xqx:orderByExpr&gt;
                  &lt;xqx:varRef&gt;
                    &lt;xqx:name&gt;last&lt;/xqx:name&gt;
                  &lt;/xqx:varRef&gt;
                &lt;/xqx:orderByExpr&gt;
              &lt;/xqx:orderBySpec&gt;
              &lt;xqx:orderBySpec&gt;
                &lt;xqx:orderByExpr&gt;
                  &lt;xqx:varRef&gt;
                    &lt;xqx:name&gt;first&lt;/xqx:name&gt;
                  &lt;/xqx:varRef&gt;
                &lt;/xqx:orderByExpr&gt;
              &lt;/xqx:orderBySpec&gt;
            &lt;/xqx:orderByClause&gt;
            &lt;xqx:returnClause&gt;
              &lt;xqx:elementConstructor&gt;
                &lt;xqx:tagName&gt;result&lt;/xqx:tagName&gt;
                &lt;xqx:elementContent&gt;
                  &lt;xqx:elementConstructor&gt;
                    &lt;xqx:tagName&gt;author&lt;/xqx:tagName&gt;
                    &lt;xqx:elementContent&gt;
                      &lt;xqx:elementConstructor&gt;
                        &lt;xqx:tagName&gt;last&lt;/xqx:tagName&gt;
                        &lt;xqx:elementContent&gt;
                          &lt;xqx:varRef&gt;
                            &lt;xqx:name&gt;last&lt;/xqx:name&gt;
                          &lt;/xqx:varRef&gt;
                        &lt;/xqx:elementContent&gt;
                      &lt;/xqx:elementConstructor&gt;
                      &lt;xqx:elementConstructor&gt;
                        &lt;xqx:tagName&gt;first&lt;/xqx:tagName&gt;
                        &lt;xqx:elementContent&gt;
                          &lt;xqx:varRef&gt;
                            &lt;xqx:name&gt;first&lt;/xqx:name&gt;
                          &lt;/xqx:varRef&gt;
                        &lt;/xqx:elementContent&gt;
                      &lt;/xqx:elementConstructor&gt;
                    &lt;/xqx:elementContent&gt;
                  &lt;/xqx:elementConstructor&gt;
                    &lt;xqx:flworExpr&gt;
                      &lt;xqx:forClause&gt;
                        &lt;xqx:forClauseItem&gt;
                          &lt;xqx:typedVariableBinding&gt;
                            &lt;xqx:varName&gt;b&lt;/xqx:varName&gt;
                          &lt;/xqx:typedVariableBinding&gt;
                          &lt;xqx:forExpr&gt;
                            &lt;xqx:pathExpr&gt;
                              &lt;xqx:stepExpr&gt;
                                &lt;xqx:filterExpr&gt;
                                  &lt;xqx:functionCallExpr&gt;
                                    &lt;xqx:functionName&gt;doc&lt;/xqx:functionName&gt;
                                    &lt;xqx:arguments&gt;
                                      &lt;xqx:stringConstantExpr&gt;
                                        &lt;xqx:value&gt;http://bstore1.example.com/bib.xml&lt;/xqx:value&gt;
                                      &lt;/xqx:stringConstantExpr&gt;
                                    &lt;/xqx:arguments&gt;
                                  &lt;/xqx:functionCallExpr&gt;
                                &lt;/xqx:filterExpr&gt;
                              &lt;/xqx:stepExpr&gt;
                              &lt;xqx:stepExpr&gt;
                                &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                &lt;xqx:nameTest&gt;bib&lt;/xqx:nameTest&gt;
                              &lt;/xqx:stepExpr&gt;
                              &lt;xqx:stepExpr&gt;
                                &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                &lt;xqx:nameTest&gt;book&lt;/xqx:nameTest&gt;
                              &lt;/xqx:stepExpr&gt;
                            &lt;/xqx:pathExpr&gt;
                          &lt;/xqx:forExpr&gt;
                        &lt;/xqx:forClauseItem&gt;
                      &lt;/xqx:forClause&gt;
                      &lt;xqx:whereClause&gt;
                        &lt;xqx:quantifiedExpr&gt;
                          &lt;xqx:quantifier&gt;some&lt;/xqx:quantifier&gt;
                          &lt;xqx:quantifiedExprInClause&gt;
                            &lt;xqx:typedVariableBinding&gt;
                              &lt;xqx:varName&gt;ba&lt;/xqx:varName&gt;
                            &lt;/xqx:typedVariableBinding&gt;
                            &lt;xqx:sourceExpr&gt;
                              &lt;xqx:pathExpr&gt;
                                &lt;xqx:stepExpr&gt;
                                  &lt;xqx:filterExpr&gt;
                                    &lt;xqx:varRef&gt;
                                      &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                                    &lt;/xqx:varRef&gt;
                                  &lt;/xqx:filterExpr&gt;
                                &lt;/xqx:stepExpr&gt;
                                &lt;xqx:stepExpr&gt;
                                  &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                  &lt;xqx:nameTest&gt;author&lt;/xqx:nameTest&gt;
                                &lt;/xqx:stepExpr&gt;
                              &lt;/xqx:pathExpr&gt;
                            &lt;/xqx:sourceExpr&gt;
                          &lt;/xqx:quantifiedExprInClause&gt;
                          &lt;xqx:predicateExpr&gt;
                            &lt;xqx:andOp&gt;
                              &lt;xqx:firstOperand&gt;
                                &lt;xqx:equalOp&gt;
                                  &lt;xqx:firstOperand&gt;
                                    &lt;xqx:pathExpr&gt;
                                      &lt;xqx:stepExpr&gt;
                                        &lt;xqx:filterExpr&gt;
                                          &lt;xqx:varRef&gt;
                                            &lt;xqx:name&gt;ba&lt;/xqx:name&gt;
                                          &lt;/xqx:varRef&gt;
                                        &lt;/xqx:filterExpr&gt;
                                      &lt;/xqx:stepExpr&gt;
                                      &lt;xqx:stepExpr&gt;
                                        &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                        &lt;xqx:nameTest&gt;last&lt;/xqx:nameTest&gt;
                                      &lt;/xqx:stepExpr&gt;
                                    &lt;/xqx:pathExpr&gt;
                                  &lt;/xqx:firstOperand&gt;
                                  &lt;xqx:secondOperand&gt;
                                    &lt;xqx:varRef&gt;
                                      &lt;xqx:name&gt;last&lt;/xqx:name&gt;
                                    &lt;/xqx:varRef&gt;
                                  &lt;/xqx:secondOperand&gt;
                                &lt;/xqx:equalOp&gt;
                              &lt;/xqx:firstOperand&gt;
                              &lt;xqx:secondOperand&gt;
                                &lt;xqx:equalOp&gt;
                                  &lt;xqx:firstOperand&gt;
                                    &lt;xqx:pathExpr&gt;
                                      &lt;xqx:stepExpr&gt;
                                        &lt;xqx:filterExpr&gt;
                                          &lt;xqx:varRef&gt;
                                            &lt;xqx:name&gt;ba&lt;/xqx:name&gt;
                                          &lt;/xqx:varRef&gt;
                                        &lt;/xqx:filterExpr&gt;
                                      &lt;/xqx:stepExpr&gt;
                                      &lt;xqx:stepExpr&gt;
                                        &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                        &lt;xqx:nameTest&gt;first&lt;/xqx:nameTest&gt;
                                      &lt;/xqx:stepExpr&gt;
                                    &lt;/xqx:pathExpr&gt;
                                  &lt;/xqx:firstOperand&gt;
                                  &lt;xqx:secondOperand&gt;
                                    &lt;xqx:varRef&gt;
                                      &lt;xqx:name&gt;first&lt;/xqx:name&gt;
                                    &lt;/xqx:varRef&gt;
                                  &lt;/xqx:secondOperand&gt;
                                &lt;/xqx:equalOp&gt;
                              &lt;/xqx:secondOperand&gt;
                            &lt;/xqx:andOp&gt;
                          &lt;/xqx:predicateExpr&gt;
                        &lt;/xqx:quantifiedExpr&gt;
                      &lt;/xqx:whereClause&gt;
                      &lt;xqx:returnClause&gt;
                        &lt;xqx:pathExpr&gt;
                          &lt;xqx:stepExpr&gt;
                            &lt;xqx:filterExpr&gt;
                              &lt;xqx:varRef&gt;
                                &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                              &lt;/xqx:varRef&gt;
                            &lt;/xqx:filterExpr&gt;
                          &lt;/xqx:stepExpr&gt;
                          &lt;xqx:stepExpr&gt;
                            &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                            &lt;xqx:nameTest&gt;title&lt;/xqx:nameTest&gt;
                          &lt;/xqx:stepExpr&gt;
                        &lt;/xqx:pathExpr&gt;
                      &lt;/xqx:returnClause&gt;
                    &lt;/xqx:flworExpr&gt;
                &lt;/xqx:elementContent&gt;
              &lt;/xqx:elementConstructor&gt;
            &lt;/xqx:returnClause&gt;
          &lt;/xqx:flworExpr&gt;
        &lt;/xqx:elementContent&gt;
      &lt;/xqx:elementConstructor&gt;
    &lt;/xqx:queryBody&gt;
  &lt;/xqx:mainModule&gt;
&lt;/xqx:module&gt;
</pre></div>
</div>
<div class="div3">
<h4><a id="Example2-Transformation" name=
"Example2-Transformation"></a>3.2.3 Transformation of XQueryX
Solution into XQuery</h4>
<p>Application of the stylesheet in <a href="#Stylesheet"><b>B
Transforming XQueryX to XQuery</b></a> to the XQueryX solution
results in:</p>
<div class="exampleInner">
<pre>
  
&lt;results&gt;{
 let $a:=doc("http://bstore1.example.com/bib.xml")/descendant-or-self::node()/child::author
 for $last in distinct-values($a/child::last), $first in distinct-values($a[(./child::last = $last)]/child::first)
 order by $last , $first 
 return &lt;result&gt;&lt;author&gt;&lt;last&gt;{$last}&lt;/last&gt;&lt;first&gt;{$first}&lt;/first&gt;&lt;/author&gt;{
 for $b in doc("http://bstore1.example.com/bib.xml")/child::bib/child::book
 where (some $ba in $b/child::author satisfies (($ba/child::last = $last) and ($ba/child::first = $first)))
 return $b/child::title
}&lt;/result&gt;
}&lt;/results&gt;
</pre></div>
</div>
</div>
<div class="div2">
<h3><a id="Example3" name="Example3"></a>3.3 Example 3</h3>
<p>Here is Q7 from the <a href="#xquery-use-cases">[XML Query Use
Cases]</a>, use case XMP (Experiences and Exemplars): "List the
titles and years of all books published by Addison-Wesley after
1991, in alphabetic order."</p>
<div class="div3">
<h4><a id="Example3-XQuery" name="Example3-XQuery"></a>3.3.1 XQuery
solution in XQuery Use Cases:</h4>
<div class="exampleInner">
<pre>
&lt;bib&gt;
  {
    for $b in doc("http://bstore1.example.com/bib.xml")//book
    where $b/publisher = "Addison-Wesley" and $b/@year &gt; 1991
    order by $b/title
    return
        &lt;book&gt;
            { $b/@year }
            { $b/title }
        &lt;/book&gt;
  }
&lt;/bib&gt; 
</pre></div>
</div>
<div class="div3">
<h4><a id="Example3-XQueryX" name="Example3-XQueryX"></a>3.3.2 A
solution in XQueryX:</h4>
<div class="exampleInner">
<pre>
&lt;?xml version="1.0"?&gt;
&lt;xqx:module xmlns:xqx="http://www.w3.org/2005/XQueryX"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.w3.org/2005/XQueryX
                                http://www.w3.org/2005/XQueryX/xqueryx.xsd"&gt;
  &lt;xqx:mainModule&gt;
    &lt;xqx:queryBody&gt;
      &lt;xqx:elementConstructor&gt;
        &lt;xqx:tagName&gt;bib&lt;/xqx:tagName&gt;
        &lt;xqx:elementContent&gt;
          &lt;xqx:flworExpr&gt;
            &lt;xqx:forClause&gt;
              &lt;xqx:forClauseItem&gt;
                &lt;xqx:typedVariableBinding&gt;
                  &lt;xqx:varName&gt;b&lt;/xqx:varName&gt;
                &lt;/xqx:typedVariableBinding&gt;
                &lt;xqx:forExpr&gt;
                  &lt;xqx:pathExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:filterExpr&gt;
                        &lt;xqx:functionCallExpr&gt;
                          &lt;xqx:functionName&gt;doc&lt;/xqx:functionName&gt;
                          &lt;xqx:arguments&gt;
                            &lt;xqx:stringConstantExpr&gt;
                              &lt;xqx:value&gt;http://bstore1.example.com/bib.xml&lt;/xqx:value&gt;
                            &lt;/xqx:stringConstantExpr&gt;
                          &lt;/xqx:arguments&gt;
                        &lt;/xqx:functionCallExpr&gt;
                      &lt;/xqx:filterExpr&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;descendant-or-self&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:anyKindTest/&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:nameTest&gt;book&lt;/xqx:nameTest&gt;
                    &lt;/xqx:stepExpr&gt;
                  &lt;/xqx:pathExpr&gt;
                &lt;/xqx:forExpr&gt;
              &lt;/xqx:forClauseItem&gt;
            &lt;/xqx:forClause&gt;
            &lt;xqx:whereClause&gt;
              &lt;xqx:andOp&gt;
                &lt;xqx:firstOperand&gt;
                  &lt;xqx:equalOp&gt;
                    &lt;xqx:firstOperand&gt;
                      &lt;xqx:pathExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:filterExpr&gt;
                            &lt;xqx:varRef&gt;
                              &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                            &lt;/xqx:varRef&gt;
                          &lt;/xqx:filterExpr&gt;
                        &lt;/xqx:stepExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                          &lt;xqx:nameTest&gt;publisher&lt;/xqx:nameTest&gt;
                        &lt;/xqx:stepExpr&gt;
                      &lt;/xqx:pathExpr&gt;
                    &lt;/xqx:firstOperand&gt;
                    &lt;xqx:secondOperand&gt;
                      &lt;xqx:stringConstantExpr&gt;
                        &lt;xqx:value&gt;Addison-Wesley&lt;/xqx:value&gt;
                      &lt;/xqx:stringConstantExpr&gt;
                    &lt;/xqx:secondOperand&gt;
                  &lt;/xqx:equalOp&gt;
                &lt;/xqx:firstOperand&gt;
                &lt;xqx:secondOperand&gt;
                  &lt;xqx:greaterThanOp&gt;
                    &lt;xqx:firstOperand&gt;
                      &lt;xqx:pathExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:filterExpr&gt;
                            &lt;xqx:varRef&gt;
                              &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                            &lt;/xqx:varRef&gt;
                          &lt;/xqx:filterExpr&gt;
                        &lt;/xqx:stepExpr&gt;
                        &lt;xqx:stepExpr&gt;
                          &lt;xqx:xpathAxis&gt;attribute&lt;/xqx:xpathAxis&gt;
                          &lt;xqx:nameTest&gt;year&lt;/xqx:nameTest&gt;
                        &lt;/xqx:stepExpr&gt;
                      &lt;/xqx:pathExpr&gt;
                    &lt;/xqx:firstOperand&gt;
                    &lt;xqx:secondOperand&gt;
                      &lt;xqx:integerConstantExpr&gt;
                        &lt;xqx:value&gt;1991&lt;/xqx:value&gt;
                      &lt;/xqx:integerConstantExpr&gt;
                    &lt;/xqx:secondOperand&gt;
                  &lt;/xqx:greaterThanOp&gt;
                &lt;/xqx:secondOperand&gt;
              &lt;/xqx:andOp&gt;
            &lt;/xqx:whereClause&gt;
            &lt;xqx:orderByClause&gt;
              &lt;xqx:orderBySpec&gt;
                &lt;xqx:orderByExpr&gt;
                  &lt;xqx:pathExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:filterExpr&gt;
                        &lt;xqx:varRef&gt;
                          &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                        &lt;/xqx:varRef&gt;
                      &lt;/xqx:filterExpr&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:nameTest&gt;title&lt;/xqx:nameTest&gt;
                    &lt;/xqx:stepExpr&gt;
                  &lt;/xqx:pathExpr&gt;
                &lt;/xqx:orderByExpr&gt;
              &lt;/xqx:orderBySpec&gt;
            &lt;/xqx:orderByClause&gt;
            &lt;xqx:returnClause&gt;
             &lt;xqx:elementConstructor&gt;
               &lt;xqx:tagName&gt;book&lt;/xqx:tagName&gt;
               &lt;xqx:elementContent&gt;
                 &lt;xqx:pathExpr&gt;
                   &lt;xqx:stepExpr&gt;
                     &lt;xqx:filterExpr&gt;
                       &lt;xqx:varRef&gt;
                         &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                       &lt;/xqx:varRef&gt;
                     &lt;/xqx:filterExpr&gt;
                   &lt;/xqx:stepExpr&gt;
                   &lt;xqx:stepExpr&gt;
                     &lt;xqx:xpathAxis&gt;attribute&lt;/xqx:xpathAxis&gt;
                     &lt;xqx:nameTest&gt;year&lt;/xqx:nameTest&gt;
                   &lt;/xqx:stepExpr&gt;
                 &lt;/xqx:pathExpr&gt;
                 &lt;xqx:pathExpr&gt;
                   &lt;xqx:stepExpr&gt;
                     &lt;xqx:filterExpr&gt;
                       &lt;xqx:varRef&gt;
                         &lt;xqx:name&gt;b&lt;/xqx:name&gt;
                       &lt;/xqx:varRef&gt;
                     &lt;/xqx:filterExpr&gt;
                   &lt;/xqx:stepExpr&gt;
                   &lt;xqx:stepExpr&gt;
                     &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                     &lt;xqx:nameTest&gt;title&lt;/xqx:nameTest&gt;
                   &lt;/xqx:stepExpr&gt;
                 &lt;/xqx:pathExpr&gt;
               &lt;/xqx:elementContent&gt;
             &lt;/xqx:elementConstructor&gt;
            &lt;/xqx:returnClause&gt;
          &lt;/xqx:flworExpr&gt;
        &lt;/xqx:elementContent&gt;
      &lt;/xqx:elementConstructor&gt;
    &lt;/xqx:queryBody&gt;
  &lt;/xqx:mainModule&gt;
&lt;/xqx:module&gt;
</pre></div>
</div>
<div class="div3">
<h4><a id="Example3-Transformation" name=
"Example3-Transformation"></a>3.3.3 Transformation of XQueryX
Solution into XQuery</h4>
<p>Application of the stylesheet in <a href="#Stylesheet"><b>B
Transforming XQueryX to XQuery</b></a> to the XQueryX solution
results in:</p>
<div class="exampleInner">
<pre>
  
&lt;bib&gt;{
 for $b in doc("http://bstore1.example.com/bib.xml")/descendant-or-self::node()/child::book
 where (($b/child::publisher = "Addison-Wesley") and ($b/attribute::year &gt; 1991))
 order by $b/child::title 
 return &lt;book&gt;{$b/attribute::year}{$b/child::title}&lt;/book&gt;
}&lt;/bib&gt;
</pre></div>
</div>
</div>
<div class="div2">
<h3><a id="Example4" name="Example4"></a>3.4 Example 4</h3>
<p>Here is Q8 from the <a href="#xquery-use-cases">[XML Query Use
Cases]</a>, use case NS (Queries Using Namespaces): "Select all
traders (either seller or high bidder) without negative
comments."</p>
<div class="div3">
<h4><a id="Example4-XQuery" name="Example4-XQuery"></a>3.4.1 XQuery
solution in XQuery Use Cases:</h4>
<div class="exampleInner">
<pre>
declare namespace ma = "http://www.example.com/AuctionWatch";
&lt;Q8 xmlns:ma="http://www.example.com/AuctionWatch"
    xmlns:eachbay="http://www.example.com/auctioneers#eachbay" 
    xmlns:xlink="http://www.w3.org/1999/xlink"&gt;
  {
    for $s in doc("auction.xml")//ma:Trading_Partners/(ma:Seller | ma:High_Bidder)
    where $s/*:NegativeComments = 0
    return $s
  }
&lt;/Q8&gt;
</pre></div>
</div>
<div class="div3">
<h4><a id="Example4-XQueryX" name="Example4-XQueryX"></a>3.4.2 A
solution in XQueryX:</h4>
<div class="exampleInner">
<pre>
&lt;?xml version="1.0"?&gt;
&lt;!--  ================================================================================  --&gt;
&lt;!--  Errata applied:                                                                   --&gt;
&lt;!--    XQX.E2 - Editorial (Bugzilla Bug 4963)                                          --&gt;
&lt;!--  ================================================================================  --&gt;
&lt;xqx:module xmlns:xqx="http://www.w3.org/2005/XQueryX"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="http://www.w3.org/2005/XQueryX
                          http://www.w3.org/2005/XQueryX/xqueryx.xsd"&gt;
  &lt;xqx:mainModule&gt;
    &lt;xqx:prolog&gt;
      &lt;xqx:namespaceDecl&gt;
        &lt;xqx:prefix&gt;ma&lt;/xqx:prefix&gt;
        &lt;xqx:uri&gt;http://www.example.com/AuctionWatch&lt;/xqx:uri&gt;
      &lt;/xqx:namespaceDecl&gt;
    &lt;/xqx:prolog&gt;
    &lt;xqx:queryBody&gt;
      &lt;xqx:elementConstructor&gt;
        &lt;xqx:tagName&gt;Q8&lt;/xqx:tagName&gt;
        &lt;xqx:attributeList&gt;
          &lt;xqx:namespaceDeclaration&gt;
            &lt;xqx:prefix&gt;ma&lt;/xqx:prefix&gt;
            &lt;xqx:uri&gt;http://www.example.com/AuctionWatch&lt;/xqx:uri&gt;
          &lt;/xqx:namespaceDeclaration&gt;
          &lt;xqx:namespaceDeclaration&gt;
            &lt;xqx:prefix&gt;eachbay&lt;/xqx:prefix&gt;
            &lt;xqx:uri&gt;http://www.example.com/auctioneers#eachbay&lt;/xqx:uri&gt;
          &lt;/xqx:namespaceDeclaration&gt;
          &lt;xqx:namespaceDeclaration&gt;
            &lt;xqx:prefix&gt;xlink&lt;/xqx:prefix&gt;
            &lt;xqx:uri&gt;http://www.w3.org/1999/xlink&lt;/xqx:uri&gt;
          &lt;/xqx:namespaceDeclaration&gt;
        &lt;/xqx:attributeList&gt;
        &lt;xqx:elementContent&gt;
          &lt;xqx:flworExpr&gt;
            &lt;xqx:forClause&gt;
              &lt;xqx:forClauseItem&gt;
                &lt;xqx:typedVariableBinding&gt;
                  &lt;xqx:varName&gt;s&lt;/xqx:varName&gt;
                &lt;/xqx:typedVariableBinding&gt;
                &lt;xqx:forExpr&gt;
                  &lt;xqx:pathExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:filterExpr&gt;
                        &lt;xqx:functionCallExpr&gt;
                          &lt;xqx:functionName xqx:prefix="fn"&gt;doc&lt;/xqx:functionName&gt;
                          &lt;xqx:arguments&gt;
                            &lt;xqx:stringConstantExpr&gt;
                              &lt;xqx:value&gt;auction.xml&lt;/xqx:value&gt;
                            &lt;/xqx:stringConstantExpr&gt;
                          &lt;/xqx:arguments&gt;
                        &lt;/xqx:functionCallExpr&gt;
                      &lt;/xqx:filterExpr&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;descendant-or-self&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:anyKindTest/&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:nameTest xqx:prefix="ma"&gt;Trading_Partners&lt;/xqx:nameTest&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:filterExpr&gt;
<span>                        &lt;xqx:sequenceExpr&gt;
                          &lt;xqx:unionOp&gt;
                            &lt;xqx:firstOperand&gt;
                              &lt;xqx:pathExpr&gt;
                                &lt;xqx:stepExpr&gt;
                                  &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                  &lt;xqx:nameTest xqx:prefix="ma"&gt;Seller&lt;/xqx:nameTest&gt;
                                &lt;/xqx:stepExpr&gt;
                              &lt;/xqx:pathExpr&gt;
                            &lt;/xqx:firstOperand&gt;
                            &lt;xqx:secondOperand&gt;
                              &lt;xqx:pathExpr&gt;
                                &lt;xqx:stepExpr&gt;
                                  &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                                  &lt;xqx:nameTest xqx:prefix="ma"&gt;High_Bidder&lt;/xqx:nameTest&gt;
                                &lt;/xqx:stepExpr&gt;
                              &lt;/xqx:pathExpr&gt;
                            &lt;/xqx:secondOperand&gt;
                          &lt;/xqx:unionOp&gt;
                        &lt;/xqx:sequenceExpr&gt;
</span>                      &lt;/xqx:filterExpr&gt;
                    &lt;/xqx:stepExpr&gt;
                  &lt;/xqx:pathExpr&gt;
                &lt;/xqx:forExpr&gt;
              &lt;/xqx:forClauseItem&gt;
            &lt;/xqx:forClause&gt;
            &lt;xqx:whereClause&gt;
              &lt;xqx:equalOp&gt;
                &lt;xqx:firstOperand&gt;
                  &lt;xqx:pathExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:filterExpr&gt;
                        &lt;xqx:varRef&gt;
                          &lt;xqx:name&gt;s&lt;/xqx:name&gt;
                        &lt;/xqx:varRef&gt;
                      &lt;/xqx:filterExpr&gt;
                    &lt;/xqx:stepExpr&gt;
                    &lt;xqx:stepExpr&gt;
                      &lt;xqx:xpathAxis&gt;child&lt;/xqx:xpathAxis&gt;
                      &lt;xqx:Wildcard&gt;
                        &lt;xqx:star/&gt;
                        &lt;xqx:NCName&gt;NegativeComments&lt;/xqx:NCName&gt;
                      &lt;/xqx:Wildcard&gt;
                    &lt;/xqx:stepExpr&gt;
                  &lt;/xqx:pathExpr&gt;
                &lt;/xqx:firstOperand&gt;
                &lt;xqx:secondOperand&gt;
                  &lt;xqx:integerConstantExpr&gt;
                    &lt;xqx:value&gt;0&lt;/xqx:value&gt;
                  &lt;/xqx:integerConstantExpr&gt;
                &lt;/xqx:secondOperand&gt;
              &lt;/xqx:equalOp&gt;
            &lt;/xqx:whereClause&gt;
            &lt;xqx:returnClause&gt;
              &lt;xqx:varRef&gt;
                &lt;xqx:name&gt;s&lt;/xqx:name&gt;
              &lt;/xqx:varRef&gt;
            &lt;/xqx:returnClause&gt;
          &lt;/xqx:flworExpr&gt;
        &lt;/xqx:elementContent&gt;
      &lt;/xqx:elementConstructor&gt;
    &lt;/xqx:queryBody&gt;
  &lt;/xqx:mainModule&gt;
&lt;/xqx:module&gt;
</pre></div>
</div>
<div class="div3">
<h4><a id="Example4-Transformation" name=
"Example4-Transformation"></a>3.4.3 Transformation of XQueryX
Solution into XQuery</h4>
<p>Application of the stylesheet in <a href="#Stylesheet"><b>B
Transforming XQueryX to XQuery</b></a> to the XQueryX solution
results in:</p>
<div class="exampleInner">
<pre>
  
declare namespace ma="http://www.example.com/AuctionWatch";
&lt;Q8 xmlns:ma="http://www.example.com/AuctionWatch"
    xmlns:eachbay="http://www.example.com/auctioneers#eachbay"
    xmlns:xlink="http://www.w3.org/1999/xlink"&gt;{
 for $s in fn:doc("auction.xml")/descendant-or-self::node()/
                                 child::ma:Trading_Partners/
                                 ((child::ma:Seller union child::ma:High_Bidder))
 where ($s/child::*:NegativeComments = 0)
 return $s
}&lt;/Q8&gt;
</pre></div>
</div>
</div>
</div>
<div class="div1">
<h2><a id="Schema" name="Schema"></a>4 An XML Schema for the XQuery
XML Syntax</h2>
<p>Here is the XML Schema against which XQueryX documents must be
valid.</p>
<div class="exampleInner">
<pre>
&lt;?xml version="1.0"?&gt;
&lt;!--
  Changes from Recommendation (edition 1):
  * Element def'ns using anonymous complex types changed to use named types (bug #4924)
  * In Example 4, replaced xqx:parentheziedExpr with xqx:sequenceExpr (bug #4963)
  * In XSLT stylesheet, deleted template for xqx:parenthesizedExpr (bug #4963)
  * Replaced link to grammar applet with correct link (bug #5323)
  * In XSLT stylesheet, corrected template for xqx:namespaceDeclaration (bug #5343)
--&gt;
&lt;!--  ================================================================================  --&gt;
&lt;!--  NOTES TO READERS OF THIS SCHEMA:                                                  --&gt;
&lt;!--  The default value for both minOccurs and maxOccurs is "1".                        --&gt;
&lt;!--  The XQueryX schema has been designed to provide the ability to extend definitions --&gt;
&lt;!--    of top-level elements in extensions such as Full-Text and the Update Facility.  --&gt;
&lt;!--    The nature of the modification is to define named complex types and redefine    --&gt;
&lt;!--    those top-level elements in terms of the named complex types.                   --&gt;
&lt;!--  ================================================================================  --&gt;
&lt;!--  Errata applied:                                                                   --&gt;
&lt;!--    XQX.E1 - Editorial (Bugzilla Bug 4924)                                          --&gt;
&lt;!--  ================================================================================  --&gt;

&lt;xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
            xmlns="http://www.w3.org/2005/XQueryX"
            targetNamespace="http://www.w3.org/2005/XQueryX"
            elementFormDefault="qualified" attributeFormDefault="qualified"&gt;


&lt;!-- A few helper declarations                                                          --&gt;
  &lt;xsd:complexType name="emptyContent"/&gt;

  &lt;xsd:element name="NCName" type="xsd:NCName"/&gt;

  &lt;xsd:complexType name="QName"&gt;
    &lt;xsd:simpleContent&gt;
      &lt;xsd:extension base="xsd:NCName"&gt;
        &lt;xsd:attribute name="prefix" type="xsd:NCName" use="optional"/&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:simpleContent&gt;
  &lt;/xsd:complexType&gt;


&lt;!-- The base expression class                                                          --&gt;
  &lt;xsd:complexType name="expr"/&gt;

  &lt;xsd:element name="expr" type="expr" abstract="true"/&gt;


&lt;!-- A list of expressions                                                              --&gt;
  &lt;xsd:complexType name="exprList"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="expr" minOccurs="0" maxOccurs="unbounded"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

&lt;!-- A type to be used by elements that comprise an optional expr                       --&gt;
  &lt;xsd:complexType name="exprWrapperOptional"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="expr" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

&lt;!-- Simple wrapper class                                                               --&gt;
  &lt;xsd:complexType name="exprWrapper"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="expr"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

&lt;!-- constant expressions. We have 4 different subclasses for this                      --&gt;
  &lt;xsd:complexType name="constantExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="value" type="xsd:anyType"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="constantExpr" type="constantExpr" abstract="true"
               substitutionGroup="expr"/&gt;


  &lt;xsd:complexType name="integerConstantExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:restriction base="constantExpr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="value" type="xsd:integer"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:restriction&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="integerConstantExpr" type="integerConstantExpr"
               substitutionGroup="constantExpr"/&gt;


  &lt;xsd:complexType name="decimalConstantExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:restriction base="constantExpr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="value" type="xsd:decimal"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:restriction&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="decimalConstantExpr" type="decimalConstantExpr"
               substitutionGroup="constantExpr"/&gt;


  &lt;xsd:complexType name="doubleConstantExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:restriction base="constantExpr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="value" type="xsd:double"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:restriction&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="doubleConstantExpr" type="doubleConstantExpr"
               substitutionGroup="constantExpr"/&gt;


  &lt;xsd:complexType name="stringConstantExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:restriction base="constantExpr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="value" type="xsd:string"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:restriction&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="stringConstantExpr" type="stringConstantExpr"
               substitutionGroup="constantExpr"/&gt;


&lt;!-- Variables                                                                          --&gt;
  &lt;xsd:complexType name="varRef"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="name" type="QName"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="varRef" type="varRef" substitutionGroup="expr"/&gt;


&lt;!-- root and context-item expressions                                                  --&gt;
&lt;!-- rootExpr deleted per Bugzilla Bug #2523                                            --&gt;
  &lt;xsd:complexType name="contextItemExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"/&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="contextItemExpr" type="contextItemExpr"
               substitutionGroup="expr"/&gt;

<span>
&lt;!-- Pragmas and extension expressions                                                  --&gt;
  &lt;xsd:complexType name="pragma"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="pragmaName" type="QName"/&gt;
      &lt;xsd:element name="pragmaContents" type="xsd:string"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="pragma" type="pragma"/&gt;
</span>

  &lt;xsd:complexType name="extensionExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element ref="pragma" maxOccurs="unbounded"/&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="extensionExpr" type="extensionExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- Function call expressions                                                          --&gt;
  &lt;xsd:complexType name="functionCallExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="functionName" type="QName"/&gt;
          &lt;xsd:element name="arguments" type="exprList" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="functionCallExpr" type="functionCallExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- Constructor functions                                                              --&gt;
  &lt;xsd:complexType name="constructorFunctionExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="typeName" type="QName"/&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="constructorFunctionExpr" type="constructorFunctionExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- Sequence expressions                                                               --&gt;
  &lt;xsd:complexType name="sequenceExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element ref="expr" minOccurs="0" maxOccurs="unbounded"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="sequenceExpr" type="sequenceExpr" substitutionGroup="expr"/&gt;


  &lt;xsd:complexType name="rangeSequenceExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="startExpr" type="exprWrapper"/&gt;
          &lt;xsd:element name="endExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="rangeSequenceExpr" type="rangeSequenceExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- Builtin operator expressions                                                       --&gt;
  &lt;xsd:complexType name="operatorExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"/&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;


  &lt;xsd:complexType name="unaryOperatorExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="operatorExpr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="operand" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;


  &lt;xsd:complexType name="binaryOperatorExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="operatorExpr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="firstOperand" type="exprWrapper"/&gt;
          &lt;xsd:element name="secondOperand" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;


  &lt;xsd:element name="operatorExpr" type="operatorExpr"
               abstract="true" substitutionGroup="expr"/&gt;

  &lt;xsd:element name="arithmeticOp" type="operatorExpr"
               abstract="true" substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="addOp" type="binaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="subtractOp" type="binaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="multiplyOp" type="binaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="divOp" type="binaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="idivOp" type="binaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="modOp" type="binaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="unaryMinusOp" type="unaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="unaryPlusOp" type="unaryOperatorExpr"
               substitutionGroup="arithmeticOp"/&gt;

  &lt;xsd:element name="comparisonOp" type="binaryOperatorExpr" abstract="true"
               substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="valueComparisonOp" type="binaryOperatorExpr" abstract="true"
               substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="eqOp" type="binaryOperatorExpr"
               substitutionGroup="valueComparisonOp"/&gt;

  &lt;xsd:element name="neOp" type="binaryOperatorExpr"
               substitutionGroup="valueComparisonOp"/&gt;

  &lt;xsd:element name="gtOp" type="binaryOperatorExpr"
               substitutionGroup="valueComparisonOp"/&gt;

  &lt;xsd:element name="geOp" type="binaryOperatorExpr"
               substitutionGroup="valueComparisonOp"/&gt;

  &lt;xsd:element name="ltOp" type="binaryOperatorExpr"
               substitutionGroup="valueComparisonOp"/&gt;

  &lt;xsd:element name="leOp" type="binaryOperatorExpr"
               substitutionGroup="valueComparisonOp"/&gt;

  &lt;xsd:element name="generalComparisonOp" type="binaryOperatorExpr" abstract="true"
               substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="equalOp" type="binaryOperatorExpr"
               substitutionGroup="generalComparisonOp"/&gt;

  &lt;xsd:element name="notEqualOp" type="binaryOperatorExpr"
               substitutionGroup="generalComparisonOp"/&gt;

  &lt;xsd:element name="lessThanOp" type="binaryOperatorExpr"
               substitutionGroup="generalComparisonOp"/&gt;

  &lt;xsd:element name="lessThanOrEqualOp" type="binaryOperatorExpr"
               substitutionGroup="generalComparisonOp"/&gt;

  &lt;xsd:element name="greaterThanOp" type="binaryOperatorExpr"
               substitutionGroup="generalComparisonOp"/&gt;

  &lt;xsd:element name="greaterThanOrEqualOp" type="binaryOperatorExpr"
               substitutionGroup="generalComparisonOp"/&gt;

  &lt;xsd:element name="nodeComparisonOp" type="binaryOperatorExpr" abstract="true"
               substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="isOp" type="binaryOperatorExpr"
               substitutionGroup="nodeComparisonOp"/&gt;

  &lt;xsd:element name="orderComparisonOp" type="binaryOperatorExpr" abstract="true"
               substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="nodeBeforeOp" type="binaryOperatorExpr"
               substitutionGroup="orderComparisonOp"/&gt;

  &lt;xsd:element name="nodeAfterOp" type="binaryOperatorExpr"
               substitutionGroup="orderComparisonOp"/&gt;

  &lt;xsd:element name="logicalOp" type="binaryOperatorExpr" abstract="true"
               substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="andOp" type="binaryOperatorExpr"
               substitutionGroup="logicalOp"/&gt;

  &lt;xsd:element name="orOp" type="binaryOperatorExpr"
               substitutionGroup="logicalOp"/&gt;

  &lt;xsd:element name="setOp" type="binaryOperatorExpr"
               abstract="true" substitutionGroup="operatorExpr"/&gt;

  &lt;xsd:element name="unionOp" type="binaryOperatorExpr"
               substitutionGroup="setOp"/&gt;

  &lt;xsd:element name="intersectOp" type="binaryOperatorExpr"
               substitutionGroup="setOp"/&gt;

  &lt;xsd:element name="exceptOp" type="binaryOperatorExpr"
               substitutionGroup="setOp"/&gt;


&lt;!-- Basic typenames                                                                    --&gt;
  &lt;xsd:element name="atomicType" type="QName" substitutionGroup="itemType"/&gt;

<span>
&lt;!-- Used in castable expression and cast expression                                    --&gt;
  &lt;xsd:complexType name="singleType"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="atomicType"/&gt;
      &lt;xsd:element name="optional" type="emptyContent" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="singleType" type="singleType"/&gt;
</span>

&lt;!-- Item type schema types and elements                                                --&gt;
  &lt;xsd:element name="itemType" abstract="true"/&gt;


  &lt;xsd:complexType name="emptyItemTypeContent"/&gt;

  &lt;xsd:element name="anyItemType" type="emptyItemTypeContent"
               substitutionGroup="itemType"/&gt;


  &lt;xsd:simpleType name="occurrenceIndicator"&gt;
    &lt;xsd:restriction base="xsd:string"&gt;
      &lt;xsd:enumeration value="?"/&gt;
      &lt;xsd:enumeration value="*"/&gt;
      &lt;xsd:enumeration value="+"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;


&lt;!-- Sequence type                                                                      --&gt;
  &lt;xsd:complexType name="sequenceType"&gt;
    &lt;xsd:choice&gt;
      &lt;xsd:element name="voidSequenceType" type="emptyContent"/&gt;
      &lt;xsd:sequence&gt;
        &lt;xsd:element ref="itemType"/&gt;
        &lt;xsd:element name="occurrenceIndicator" type="occurrenceIndicator"
                     minOccurs="0"/&gt;
      &lt;/xsd:sequence&gt;
    &lt;/xsd:choice&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="sequenceType" type="sequenceType"/&gt;

  &lt;xsd:element name="typeDeclaration" type="sequenceType"/&gt;

<span>
&lt;!-- Represents a "typed" variable (for clause, let clause etc)                         --&gt;
  &lt;xsd:complexType name="typedVariableBinding"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="varName" type="QName"/&gt;
      &lt;xsd:element ref="typeDeclaration" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="typedVariableBinding" type="typedVariableBinding"/&gt;
</span>

&lt;!-- Represents an untyped variable for the "at" clause in a for clause                 --&gt;
  &lt;xsd:element name="positionalVariableBinding" type="QName"/&gt;

  &lt;xsd:element name="variableBinding" type="QName"/&gt;


&lt;!-- Represents all variable bindings in a for or let clause except typed and           --&gt;
&lt;!--   positional variable bindings                                                     --&gt;
  &lt;xsd:element name="forLetClauseItemExtensions" abstract="true"/&gt;


&lt;!-- Major syntax productions: FLWOR clause components                                  --&gt;
&lt;!-- for clause                                                                         --&gt;
  &lt;xsd:complexType name="forClauseItem"&gt;
    &lt;xsd:sequence&gt;
          &lt;xsd:element ref="typedVariableBinding"/&gt;
            &lt;xsd:element ref="positionalVariableBinding" minOccurs="0" maxOccurs="1"/&gt;
      &lt;xsd:element ref="forLetClauseItemExtensions" minOccurs="0"
                   maxOccurs="unbounded"/&gt;
      &lt;xsd:element name="forExpr" type="exprWrapper"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="forClauseItem" type="forClauseItem"/&gt;

<span>
  &lt;xsd:complexType name="forClause"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="forClauseItem" minOccurs="1" maxOccurs="unbounded"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="forClause" type="forClause"/&gt;


&lt;!-- let clause                                                                         --&gt;
  &lt;xsd:complexType name="letClauseItem"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:choice&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element ref="typedVariableBinding"/&gt;
          &lt;xsd:element ref="forLetClauseItemExtensions"
                       minOccurs="0" maxOccurs="unbounded"/&gt;
        &lt;/xsd:sequence&gt;
        &lt;xsd:element ref="forLetClauseItemExtensions"
                     minOccurs="0" maxOccurs="unbounded"/&gt;
      &lt;/xsd:choice&gt;
      &lt;xsd:element name="letExpr" type="exprWrapper"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="letClauseItem" type="letClauseItem"/&gt;


  &lt;xsd:complexType name="letClause"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="letClauseItem" maxOccurs="unbounded"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="letClause" type="letClause"/&gt;
</span>

&lt;!-- whereClause (part of FLWOR expression)                                             --&gt;
  &lt;xsd:element name="whereClause" type="exprWrapper"/&gt;



&lt;!-- order by clause                                                                    --&gt;
  &lt;xsd:simpleType name="emptyOrderingMode"&gt;
    &lt;xsd:restriction base="xsd:string"&gt;
      &lt;xsd:enumeration value="empty greatest"/&gt;
      &lt;xsd:enumeration value="empty least"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;

  &lt;xsd:simpleType name="orderingKind"&gt;
    &lt;xsd:restriction base="xsd:string"&gt;
      &lt;xsd:enumeration value="ascending"/&gt;
      &lt;xsd:enumeration value="descending"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;

<span>
  &lt;xsd:complexType name="orderModifier"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="orderingKind" type="orderingKind" minOccurs="0"/&gt;
      &lt;xsd:element name="emptyOrderingMode" type="emptyOrderingMode" minOccurs="0"/&gt;
      &lt;xsd:element name="collation" type="xsd:string" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="orderModifier" type="orderModifier"/&gt;


  &lt;xsd:complexType name="orderBySpec"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="orderByExpr" type="exprWrapper"/&gt;
      &lt;xsd:element ref="orderModifier" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="orderBySpec" type="orderBySpec"/&gt;


  &lt;xsd:complexType name="orderByClause"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="stable" type="emptyContent" minOccurs="0"/&gt;
      &lt;xsd:element ref="orderBySpec" maxOccurs="unbounded"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="orderByClause" type="orderByClause"/&gt;
</span>
<span>
&lt;!-- return clause                                                                      --&gt;
  &lt;xsd:element name="returnClause" type="exprWrapper"/&gt;
</span>
  &lt;!-- This is the flwor expression --&gt;
  &lt;xsd:complexType name="flworExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:choice maxOccurs="unbounded"&gt;
            &lt;xsd:element ref="forClause"/&gt;
            &lt;xsd:element ref="letClause"/&gt;
          &lt;/xsd:choice&gt;
          &lt;xsd:element ref="whereClause" minOccurs="0"/&gt;
          &lt;xsd:element ref="orderByClause" minOccurs="0"/&gt;
          &lt;xsd:element ref="returnClause"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="flworExpr" type="flworExpr" substitutionGroup="expr"/&gt;


&lt;!-- conditional expressions                                                            --&gt;
  &lt;xsd:complexType name="ifThenElseExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="ifClause" type="exprWrapper"/&gt;
          &lt;xsd:element name="thenClause" type="exprWrapper"/&gt;
          &lt;xsd:element name="elseClause" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="ifThenElseExpr" type="ifThenElseExpr" 
               substitutionGroup="expr"/&gt;


&lt;!-- The following clauses describe quantified expressions                              --&gt;
  &lt;xsd:simpleType name="quantifier"&gt;
    &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
      &lt;xsd:enumeration value="some"/&gt;
      &lt;xsd:enumeration value="every"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;

<span>
  &lt;xsd:complexType name="quantifiedExprInClause"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="typedVariableBinding"/&gt;
      &lt;xsd:element name="sourceExpr" type="exprWrapper"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="quantifiedExprInClause" type="quantifiedExprInClause"/&gt;
</span>

  &lt;xsd:complexType name="quantifiedExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="quantifier" type="quantifier"/&gt;
          &lt;xsd:element ref="quantifiedExprInClause" maxOccurs="unbounded"/&gt;
          &lt;xsd:element name="predicateExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="quantifiedExpr" type="quantifiedExpr"
               substitutionGroup="expr"/&gt;

<span>
  &lt;!-- handle the typeswitch construct                                                    --&gt;
&lt;!-- Note: no substitutionGroup as we cannot use this anywhere                          --&gt;
  &lt;xsd:complexType name="typeswitchExprCaseClause"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element ref="variableBinding" minOccurs="0"/&gt;
          &lt;xsd:element ref="sequenceType"/&gt;
          &lt;xsd:element name="resultExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="typeswitchExprCaseClause"
               type="typeswitchExprCaseClause"/&gt;


&lt;!-- Note: no substitutionGroup as we cannot use this anywhere                          --&gt;
  &lt;xsd:complexType name="typeswitchExprDefaultClause"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element ref="variableBinding" minOccurs="0"/&gt;
          &lt;xsd:element name="resultExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="typeswitchExprDefaultClause"
               type="typeswitchExprDefaultClause"/&gt;
</span>

  &lt;xsd:complexType name="typeswitchExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
          &lt;xsd:element ref="typeswitchExprCaseClause" maxOccurs="unbounded"/&gt;
          &lt;xsd:element ref="typeswitchExprDefaultClause"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="typeswitchExpr" type="typeswitchExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- instance-of expressions                                                            --&gt;
  &lt;xsd:complexType name="instanceOfExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
          &lt;xsd:element ref="sequenceType"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="instanceOfExpr" type="instanceOfExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- treat-as expressions                                                               --&gt;
  &lt;xsd:complexType name="treatExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
          &lt;xsd:element ref="sequenceType"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="treatExpr" type="treatExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- castable and cast expressions                                                      --&gt;
  &lt;xsd:complexType name="castableExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
          &lt;xsd:element ref="singleType"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="castableExpr" type="castableExpr"
               substitutionGroup="expr"/&gt;


  &lt;xsd:complexType name="castExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
          &lt;xsd:element ref="singleType"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="castExpr" type="castExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- Validate expressions                                                               --&gt;
  &lt;xsd:simpleType name="validationMode"&gt;
    &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
      &lt;xsd:enumeration value="lax"/&gt;
      &lt;xsd:enumeration value="strict"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;

  &lt;xsd:complexType name="validateExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="validationMode" type="validationMode" minOccurs="0"/&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="validateExpr" type="validateExpr"
               substitutionGroup="expr"/&gt;


&lt;!-- Direct constructors. Only elementConstructor for now                               --&gt;
&lt;!-- Note the absence of constructors corresponding to                                  --&gt;
&lt;!-- the directCommentConstructor and the directPIConstructor                           --&gt;
&lt;!-- productions in the XQuery grammar. This is because they are                        --&gt;
&lt;!-- trivially identical to the computed variants                                       --&gt;

&lt;!-- attributeConstructor is no longer a subclass of expr                               --&gt;
  &lt;xsd:complexType name="attributeConstructor"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="attributeName" type="QName"/&gt;
      &lt;xsd:choice&gt;
        &lt;xsd:element name="attributeValueExpr" type="exprList"/&gt;
        &lt;xsd:element name="attributeValue" type="xsd:string"/&gt;
      &lt;/xsd:choice&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:complexType name="namespaceDeclaration"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="prefix" type="xsd:NCName" minOccurs="0"/&gt;
      &lt;xsd:element name="uri" type="xsd:string"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

<span>
&lt;!-- element constructors                                                               --&gt;
  &lt;xsd:complexType name="attributeList"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:choice maxOccurs="unbounded"&gt;
        &lt;xsd:element name="attributeConstructor" type="attributeConstructor"/&gt;
        &lt;xsd:element name="namespaceDeclaration" type="namespaceDeclaration"/&gt;
      &lt;/xsd:choice&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="attributeList" type="attributeList"/&gt;
</span>

  &lt;xsd:element name="elementContent" type="exprList"/&gt;


  &lt;xsd:complexType name="elementConstructor"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="tagName" type="QName"/&gt;
          &lt;xsd:element ref="attributeList" minOccurs="0"/&gt;
          &lt;xsd:element ref="elementContent" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="elementConstructor" type="elementConstructor"
               substitutionGroup="expr"/&gt;


&lt;!-- computed constructors                                                              --&gt;
&lt;!-- computed element constructor                                                       --&gt;
  &lt;xsd:complexType name="computedElementConstructor"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:choice&gt;
            &lt;xsd:element name="tagName" type="QName"/&gt;
            &lt;xsd:element name="tagNameExpr" type="exprWrapper"/&gt;
          &lt;/xsd:choice&gt;
          &lt;xsd:element name="contentExpr" type="exprWrapper" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="computedElementConstructor" type="computedElementConstructor"
               substitutionGroup="expr"/&gt;


&lt;!-- computed attribute constructor                                                     --&gt;
  &lt;xsd:complexType name="computedAttributeConstructor"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:choice&gt;
            &lt;xsd:element name="tagName" type="QName"/&gt;
            &lt;xsd:element name="tagNameExpr" type="exprWrapper"/&gt;
          &lt;/xsd:choice&gt;
          &lt;xsd:element name="valueExpr" type="exprWrapper" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="computedAttributeConstructor" type="computedAttributeConstructor"
               substitutionGroup="expr"/&gt;


&lt;!-- computed document constructor                                                      --&gt;
  &lt;xsd:complexType name="computedDocumentConstructor"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="computedDocumentConstructor" type="computedDocumentConstructor"
               substitutionGroup="expr"/&gt;


&lt;!-- computed text constructor                                                          --&gt;
  &lt;xsd:complexType name="computedTextConstructor"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="computedTextConstructor" type="computedTextConstructor"
               substitutionGroup="expr"/&gt;


&lt;!-- computed comment constructor                                                       --&gt;
  &lt;xsd:complexType name="computedCommentConstructor"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="computedCommentConstructor" type="computedCommentConstructor"
               substitutionGroup="expr"/&gt;


&lt;!-- computed processing instruction constructor                                        --&gt;
  &lt;xsd:complexType name="computedPIConstructor"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:choice&gt;
            &lt;xsd:element name="piTarget" type="xsd:NCName"/&gt;
            &lt;xsd:element name="piTargetExpr" type="exprWrapper"/&gt;
          &lt;/xsd:choice&gt;
          &lt;xsd:element name="piValueExpr" type="exprWrapper" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="computedPIConstructor" type="computedPIConstructor"
               substitutionGroup="expr"/&gt;


&lt;!-- ordered and unordered expressions                                                  --&gt;
  &lt;xsd:complexType name="unorderedExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="unorderedExpr" type="unorderedExpr" substitutionGroup="expr"/&gt;


  &lt;xsd:complexType name="orderedExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="argExpr" type="exprWrapper"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="orderedExpr" type="orderedExpr" substitutionGroup="expr"/&gt;


&lt;!-- wildcards                                                                          --&gt;
  &lt;xsd:complexType name="simpleWildcard"&gt;
    &lt;xsd:choice&gt;
      &lt;xsd:element name="QName" type="QName"/&gt;
      &lt;xsd:element name="star" type="emptyContent"/&gt;
    &lt;/xsd:choice&gt;
  &lt;/xsd:complexType&gt;

<span>
  &lt;xsd:complexType name="Wildcard"&gt;
    &lt;xsd:all&gt;
      &lt;xsd:element name="star" type="emptyContent" minOccurs="0"/&gt;
      &lt;xsd:element ref="NCName" minOccurs="0"/&gt;
    &lt;/xsd:all&gt;
  &lt;/xsd:complexType&gt;


  &lt;xsd:element name="Wildcard" type="Wildcard"/&gt;


&lt;!-- tests (name and/or type)                                                           --&gt;
  &lt;xsd:element name="schemaAttributeTest" type="QName"
               substitutionGroup="kindTest"/&gt;


  &lt;xsd:complexType name="attributeTest"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="emptyItemTypeContent"&gt;
        &lt;xsd:sequence minOccurs="0"&gt;
          &lt;xsd:element name="attributeName" type="simpleWildcard"/&gt;
          &lt;xsd:element name="typeName" type="QName" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="attributeTest" type="attributeTest"
               substitutionGroup="kindTest"/&gt;
</span>

  &lt;xsd:element name="anyElementTest" abstract="true"
               substitutionGroup="kindTest"/&gt;


  &lt;xsd:element name="schemaElementTest" type="QName"
               substitutionGroup="anyElementTest"/&gt;

<span>
  &lt;xsd:complexType name="elementTest"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="emptyItemTypeContent"&gt;
        &lt;xsd:sequence minOccurs="0"&gt;
          &lt;xsd:element name="elementName" type="simpleWildcard"/&gt;
          &lt;xsd:sequence minOccurs="0"&gt;
            &lt;xsd:element name="typeName" type="QName"/&gt;
            &lt;xsd:element name="nillable" type="emptyContent" minOccurs="0"/&gt;
          &lt;/xsd:sequence&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="elementTest" type="elementTest"
               substitutionGroup="anyElementTest"/&gt;


  &lt;xsd:complexType name="documentTest"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="emptyItemTypeContent"&gt;
        &lt;xsd:sequence&gt;
           &lt;xsd:element ref="anyElementTest" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="documentTest" type="documentTest"
               substitutionGroup="kindTest"/&gt;


  &lt;xsd:complexType name="piTest"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="emptyItemTypeContent"&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element name="piTarget" type="xsd:NCName" minOccurs="0"/&gt;
        &lt;/xsd:sequence&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="piTest" type="piTest" substitutionGroup="kindTest"/&gt;
</span>

  &lt;xsd:element name="nameTest" type="QName"/&gt;

  &lt;xsd:element name="kindTest" substitutionGroup="itemType"/&gt;

  &lt;xsd:element name="textTest" type="emptyItemTypeContent"
               substitutionGroup="kindTest"/&gt;

  &lt;xsd:element name="commentTest" type="emptyItemTypeContent"
               substitutionGroup="kindTest"/&gt;

  &lt;xsd:element name="anyKindTest" type="emptyItemTypeContent"
               substitutionGroup="kindTest"/&gt;

<span>
&lt;!-- XPath axes                                                                         --&gt;
  &lt;xsd:simpleType name="xpathAxis"&gt;
    &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
      &lt;xsd:enumeration value="child"/&gt;
      &lt;xsd:enumeration value="attribute"/&gt;
      &lt;xsd:enumeration value="self"/&gt;
      &lt;xsd:enumeration value="parent"/&gt;
      &lt;xsd:enumeration value="descendant-or-self"/&gt;
      &lt;xsd:enumeration value="descendant"/&gt;
      &lt;xsd:enumeration value="following"/&gt;
      &lt;xsd:enumeration value="following-sibling"/&gt;
      &lt;xsd:enumeration value="ancestor"/&gt;
      &lt;xsd:enumeration value="ancestor-or-self"/&gt;
      &lt;xsd:enumeration value="preceding"/&gt;
      &lt;xsd:enumeration value="preceding-sibling"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;

  &lt;xsd:element name="xpathAxis" type="xpathAxis"/&gt;
</span>

&lt;!-- filter expressions                                                                 --&gt;
  &lt;xsd:group name="filterExpr"&gt;
    &lt;xsd:choice&gt;
      &lt;xsd:element ref="constantExpr"/&gt;
      &lt;xsd:element ref="varRef"/&gt;
      &lt;xsd:element ref="contextItemExpr"/&gt;
      &lt;xsd:element ref="functionCallExpr"/&gt;
      &lt;xsd:element ref="sequenceExpr"/&gt;
      &lt;xsd:element ref="elementConstructor"/&gt;
      &lt;xsd:element ref="computedElementConstructor"/&gt;
      &lt;xsd:element ref="computedAttributeConstructor"/&gt;
      &lt;xsd:element ref="computedDocumentConstructor"/&gt;
      &lt;xsd:element ref="computedTextConstructor"/&gt;
      &lt;xsd:element ref="computedCommentConstructor"/&gt;
      &lt;xsd:element ref="computedPIConstructor"/&gt;
      &lt;xsd:element ref="orderedExpr"/&gt;
      &lt;xsd:element ref="unorderedExpr"/&gt;
    &lt;/xsd:choice&gt;
  &lt;/xsd:group&gt;

<span>
&lt;!-- step expression                                                                    --&gt;
&lt;!-- removed nameTest and Wildcard outer choices per Bugzilla Bug #2523                 --&gt;
  &lt;xsd:complexType name="stepExpr"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:choice&gt;
        &lt;xsd:sequence&gt;
          &lt;xsd:element ref="xpathAxis"/&gt;
          &lt;xsd:choice&gt;
            &lt;xsd:element ref="kindTest"/&gt;
            &lt;xsd:element ref="nameTest"/&gt;
            &lt;xsd:element ref="Wildcard"/&gt;
          &lt;/xsd:choice&gt;
        &lt;/xsd:sequence&gt;
        &lt;xsd:element name="filterExpr"&gt;
          &lt;xsd:complexType&gt;
            &lt;xsd:sequence&gt;
              &lt;xsd:group ref="filterExpr"/&gt;
            &lt;/xsd:sequence&gt;
          &lt;/xsd:complexType&gt;
        &lt;/xsd:element&gt;
      &lt;/xsd:choice&gt;
      &lt;xsd:element name="predicates" type="exprList" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="stepExpr" type="stepExpr"/&gt;
</span>

&lt;!-- path expression                                                                    --&gt;
&lt;!-- rewrote pathExpr definition per Bugzilla Bug #2523                                 --&gt;
  &lt;xsd:complexType name="pathExpr"&gt;
    &lt;xsd:complexContent&gt;
      &lt;xsd:extension base="expr"&gt;
        &lt;xsd:choice&gt;
          &lt;xsd:sequence&gt;
            &lt;xsd:element name="rootExpr" type="emptyContent"/&gt;
            &lt;xsd:element ref="stepExpr" minOccurs="0" maxOccurs="unbounded"/&gt;
          &lt;/xsd:sequence&gt;
          &lt;xsd:element ref="stepExpr" maxOccurs="unbounded"/&gt;
        &lt;/xsd:choice&gt;
      &lt;/xsd:extension&gt;
    &lt;/xsd:complexContent&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="pathExpr" type="pathExpr" substitutionGroup="expr"/&gt;

<span>
&lt;!-- The following constructs deal with the query prolog                                --&gt;
  &lt;xsd:complexType name="module"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="versionDecl" minOccurs="0"/&gt;
      &lt;xsd:choice&gt;
        &lt;xsd:element ref="mainModule"/&gt;
        &lt;xsd:element ref="libraryModule"/&gt;
      &lt;/xsd:choice&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="module" type="module"/&gt;


  &lt;xsd:complexType name="mainModule"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="prolog" minOccurs="0"/&gt;
      &lt;xsd:element name="queryBody" type="exprWrapper"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="mainModule" type="mainModule"/&gt;


  &lt;xsd:complexType name="libraryModule"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="moduleDecl"/&gt;
      &lt;xsd:element ref="prolog" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="libraryModule" type="libraryModule"/&gt;


  &lt;xsd:complexType name="versionDecl"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="version" type="xsd:string"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="versionDecl" type="versionDecl"/&gt;


  &lt;xsd:complexType name="prolog"&gt;
    &lt;xsd:sequence&gt;
            &lt;xsd:element ref="prologPartOneItem" minOccurs="0" maxOccurs="unbounded"/&gt;
            &lt;xsd:element ref="prologPartTwoItem" minOccurs="0" maxOccurs="unbounded"/&gt;
          &lt;/xsd:sequence&gt;
        &lt;/xsd:complexType&gt;

  &lt;xsd:element name="prolog" type="prolog"/&gt;
</span>

  &lt;xsd:element name="prologPartOneItem" abstract="true"/&gt;


  &lt;xsd:element name="prologPartTwoItem" abstract="true"/&gt;


  &lt;xsd:element name="defaultCollationDecl" type="xsd:string"
               substitutionGroup="prologPartOneItem"/&gt;

  &lt;xsd:element name="baseUriDecl" type="xsd:string"
               substitutionGroup="prologPartOneItem"/&gt;

<span>
  &lt;xsd:simpleType name="constructionDecl"&gt;
    &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
      &lt;xsd:enumeration value="strip"/&gt;
      &lt;xsd:enumeration value="preserve"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;

  &lt;xsd:element name="constructionDecl" type="constructionDecl"
               substitutionGroup="prologPartOneItem"/&gt;


  &lt;xsd:simpleType name="orderingModeDecl"&gt;
    &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
      &lt;xsd:enumeration value="ordered"/&gt;
      &lt;xsd:enumeration value="unordered"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;

  &lt;xsd:element name="orderingModeDecl" type="orderingModeDecl"
               substitutionGroup="prologPartOneItem"/&gt;
</span>

  &lt;xsd:element name="emptyOrderingDecl" type="emptyOrderingMode"
               substitutionGroup="prologPartOneItem"/&gt;

<span>
  &lt;xsd:complexType name="copyNamespacesDecl"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="preserveMode"&gt;
        &lt;xsd:simpleType&gt;
          &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
            &lt;xsd:enumeration value="preserve"/&gt;
            &lt;xsd:enumeration value="no-preserve"/&gt;
          &lt;/xsd:restriction&gt;
        &lt;/xsd:simpleType&gt;
      &lt;/xsd:element&gt;
      &lt;xsd:element name="inheritMode"&gt;
        &lt;xsd:simpleType&gt;
          &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
            &lt;xsd:enumeration value="inherit"/&gt;
            &lt;xsd:enumeration value="no-inherit"/&gt;
          &lt;/xsd:restriction&gt;
        &lt;/xsd:simpleType&gt;
      &lt;/xsd:element&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="copyNamespacesDecl" type="copyNamespacesDecl"
               substitutionGroup="prologPartOneItem"/&gt;
</span>

  &lt;xsd:simpleType name="defaultNamespaceCategory"&gt;
    &lt;xsd:restriction base="xsd:NMTOKEN"&gt;
      &lt;xsd:enumeration value="function"/&gt;
      &lt;xsd:enumeration value="element"/&gt;
    &lt;/xsd:restriction&gt;
  &lt;/xsd:simpleType&gt;
<span>
  &lt;xsd:complexType name="defaultNamespaceDecl"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="defaultNamespaceCategory" type="defaultNamespaceCategory"/&gt;
      &lt;xsd:element name="uri" type="xsd:string"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="defaultNamespaceDecl" type="defaultNamespaceDecl"
               substitutionGroup="prologPartOneItem"/&gt;
</span>

  &lt;xsd:complexType name="namespaceDeclType"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="prefix" type="xsd:NCName"/&gt;
      &lt;xsd:element name="uri" type="xsd:string"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="namespaceDecl" type="namespaceDeclType"
               substitutionGroup="prologPartOneItem"/&gt;


  &lt;xsd:element name="moduleDecl" type="namespaceDeclType"/&gt;

<span>
  &lt;xsd:complexType name="schemaImport"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:choice minOccurs="0"&gt;
        &lt;xsd:element name="namespacePrefix" type="xsd:NCName"/&gt;
        &lt;xsd:element name="defaultElementNamespace" type="emptyContent"/&gt;
      &lt;/xsd:choice&gt;
      &lt;xsd:element name="targetNamespace" type="xsd:string"/&gt;
      &lt;xsd:element name="targetLocation" type="xsd:string"
                   minOccurs="0" maxOccurs="unbounded"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="schemaImport" type="schemaImport"
               substitutionGroup="prologPartOneItem"/&gt;


  &lt;xsd:complexType name="moduleImport"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="namespacePrefix" type="xsd:NCName" minOccurs="0"/&gt;
      &lt;xsd:element name="targetNamespace" type="xsd:string"/&gt;
      &lt;xsd:element name="targetLocation" type="xsd:string"
                   minOccurs="0" maxOccurs="unbounded"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="moduleImport" type="moduleImport"
               substitutionGroup="prologPartOneItem"/&gt;


  &lt;xsd:complexType name="varDecl"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="varName" type="QName"/&gt;
      &lt;xsd:element ref="typeDeclaration" minOccurs="0"/&gt;
      &lt;xsd:choice&gt;
        &lt;xsd:element name="varValue" type="exprWrapper"/&gt;
        &lt;xsd:element name="external" type="emptyContent"/&gt;
      &lt;/xsd:choice&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="varDecl" type="varDecl"
               substitutionGroup="prologPartTwoItem"/&gt;


  &lt;xsd:complexType name="optionDecl"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="optionName" type="QName"/&gt;
      &lt;xsd:element name="optionContents" type="xsd:string"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="optionDecl" type="optionDecl"
               substitutionGroup="prologPartTwoItem"/&gt;


  &lt;xsd:complexType name="functionDecl"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="functionName" type="QName"/&gt;
      &lt;xsd:element ref="paramList"/&gt;
      &lt;xsd:element ref="typeDeclaration" minOccurs="0"/&gt;
      &lt;xsd:choice&gt;
        &lt;xsd:element name="functionBody" type="exprWrapper"/&gt;
        &lt;xsd:element name="externalDefinition" type="emptyContent"/&gt;
      &lt;/xsd:choice&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="functionDecl" type="functionDecl"
               substitutionGroup="prologPartTwoItem"/&gt;


  &lt;xsd:complexType name="param"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element name="varName" type="QName"/&gt;
      &lt;xsd:element ref="typeDeclaration" minOccurs="0"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="param" type="param"/&gt;


  &lt;xsd:complexType name="paramList"&gt;
    &lt;xsd:sequence&gt;
      &lt;xsd:element ref="param" minOccurs="0" maxOccurs="unbounded"/&gt;
    &lt;/xsd:sequence&gt;
  &lt;/xsd:complexType&gt;

  &lt;xsd:element name="paramList" type="paramList"/&gt;
</span>

&lt;/xsd:schema&gt;
</pre></div>
</div>
<div class="div1">
<h2><a id="xqx_conformance" name="xqx_conformance"></a>5
Conformance</h2>
<p>This section defines the conformance criteria for an XQueryX
processor (see Figure 1, "Processing Model Overview", in <a href=
"#xquery">[XQuery 1.0: An XML Query Language (Second Edition)]</a>,
<a href="http://www.w3.org/TR/xquery/#id-processing-model">Section
2.2 Processing Model</a><sup><small>XQ</small></sup>.</p>
<p>In this section, the following terms are used to indicate the
requirement levels defined in <a href="#RFC2119">[RFC 2119]</a>.
[Definition: MUST means that the item is an absolute requirement of
the specification.] [Definition: SHOULD means that there may exist
valid reasons in particular circumstances to ignore a particular
item, but the full implications must be understood and carefully
weighed before choosing a different course.] [Definition: MAY means
that an item is truly optional.]</p>
<p>An XQueryX processor that claims to conform to this
specification MUST implement the XQueryX syntax as defined in
<a href="#Schema"><b>4 An XML Schema for the XQuery XML
Syntax</b></a> of this specification and include a claim of Minimal
Conformance as defined in <a href="#xquery">[XQuery 1.0: An XML
Query Language (Second Edition)]</a>, <a href=
"http://www.w3.org/TR/xquery/#id-minimal-conformance">Section 5.1
Minimal Conformance</a><sup><small>XQ</small></sup>. In addition to
a claim of Minimal Conformance, it MAY claim conformance to one or
more optional features defined in <a href="#xquery">[XQuery 1.0: An
XML Query Language (Second Edition)]</a>, <a href=
"http://www.w3.org/TR/xquery/#id-conform-optional-features">Section
5.2 Optional Features</a><sup><small>XQ</small></sup>.</p>
</div>
</div>
<div class="back">
<div class="div1">
<h2><a id="biblio" name="biblio"></a>A References</h2>
<dl>
<dt class="label"><span><a id="xquery-requirements" name=
"xquery-requirements"></a>XML Query 1.0 Requirements</span></dt>
<dd>
<div><a href="http://www.w3.org/TR/xquery-requirements/"><cite>XML
Query (XQuery) Requirements</cite></a>, Don Chamberlin, Peter
Fankhauser, Massimo Marchiori, and Jonathan Robie, Editors. World
Wide Web Consortium, 3&#160;Jun&#160;2005. This version is
http://www.w3.org/TR/2005/WD-xquery-requirements-20050603/. The
<a href="http://www.w3.org/TR/xquery-requirements/">latest
version</a> is available at
http://www.w3.org/TR/xquery-requirements/.</div>
</dd>
<dt class="label"><span><a id="xquery" name="xquery"></a>XQuery
1.0: An XML Query Language (Second Edition)</span></dt>
<dd>
<div><a href="http://www.w3.org/TR/xquery/"><cite>XQuery 1.0: An
XML Query Language (Second Edition)</cite></a>, Don Chamberlin,
Jonathan Robie, Anders Berglund, Scott Boag, <em>et. al.</em>,
Editors. World Wide Web Consortium, 14 December 2010. This version
is http://www.w3.org/TR/2010/REC-xquery-20101214/. The <a href=
"http://www.w3.org/TR/xquery/">latest version</a> is available at
http://www.w3.org/TR/xquery/.</div>
</dd>
<dt class="label"><span><a id="xquery-use-cases" name=
"xquery-use-cases"></a>XML Query Use Cases</span></dt>
<dd>
<div><a href="http://www.w3.org/TR/xquery-use-cases/"><cite>XML
Query Use Cases</cite></a>, Jonathan Robie, Don Chamberlin, Peter
Fankhauser, <em>et. al.</em>, Editors. World Wide Web Consortium, 8
Jun 2006. This version is
http://www.w3.org/TR/2006/WD-xquery-use-cases-20060608/. The
<a href="http://www.w3.org/TR/xquery-use-cases/">latest version</a>
is available at http://www.w3.org/TR/xquery-use-cases/.</div>
</dd>
<dt class="label"><span><a id="xquery-semantics" name=
"xquery-semantics"></a>XQuery 1.0 and XPath 2.0 Formal Semantics
(Second Edition)</span></dt>
<dd>
<div><a href="http://www.w3.org/TR/xquery-semantics/"><cite>XQuery
1.0 and XPath 2.0 Formal Semantics (Second Edition)</cite></a>,
Jérôme Siméon, Michael Dyck, Denise Draper, Peter Frankhauser,
<em>et. al.</em>, Editors. World Wide Web Consortium, 14 December
2010. This version is
http://www.w3.org/TR/2010/REC-xquery-semantics-20101214/. The
<a href="http://www.w3.org/TR/xquery-semantics/">latest version</a>
is available at http://www.w3.org/TR/xquery-semantics/.</div>
</dd>
<dt class="label"><span><a id="RFC2119" name="RFC2119"></a>RFC
2119</span></dt>
<dd>
<div>S. Bradner. <em>Key Words for use in RFCs to Indicate
Requirement Levels.</em> IETF RFC 2119. See <a href=
"http://www.ietf.org/rfc/rfc2119.txt">http://www.ietf.org/rfc/rfc2119.txt</a>.</div>
</dd>
<dt class="label"><span><a id="RFC3023" name="RFC3023"></a>RFC
3023</span></dt>
<dd>
<div>M. Murata, S. St. Laurent, and D. Kohn. <em>XML Media
Types</em> IETF RFC 3023 or its successors. See <a href=
"http://www.ietf.org/rfc/rfc3023.txt">http://www.ietf.org/rfc/rfc3023.txt</a>.</div>
</dd>
</dl>
</div>
<div class="div1">
<h2><a id="Stylesheet" name="Stylesheet"></a>B Transforming XQueryX
to XQuery</h2>
<p>The following stylesheet converts from XQueryX syntax to XML
Query syntax. Note the intent of the stylesheet is to produce
<em>a</em> valid XQuery with the same semantics (see <a href=
"#xquery-semantics">[XQuery 1.0 and XPath 2.0 Formal Semantics
(Second Edition)]</a>) as the input XQueryX.</p>
<div class="exampleInner">
<pre>
&lt;?xml version="1.0"?&gt;
&lt;!--  ================================================================================  --&gt;
&lt;!--  Errata applied:                                                                   --&gt;
&lt;!--    XQX.E3 - Editorial (Bugzilla Bug 4963)                                          --&gt;
&lt;!--    XQX.E5 - Editorial (Bugzilla Bug 5343)                                          --&gt;
&lt;!--  ================================================================================  --&gt;
&lt;xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xqx="http://www.w3.org/2005/XQueryX"&gt;

&lt;!-- Note that this stylesheet frequently invokes templates for
     specified elements, even when there are no templates in the
     stylesheet whose match="" attribute identifies those elements.
     In such case, the default template's element matching template
     is invoked, which merely invokes xsl:apply-templates --&gt;

  &lt;xsl:output method="text"/&gt;
  &lt;xsl:strip-space elements="*"/&gt;
  &lt;xsl:preserve-space elements="xqx:value xqx:attributeValue xqx:pragmaContents
                                xqx:optionContents xqx:xquery"/&gt;

  &lt;xsl:variable name="DOT" select="'.'"/&gt;
  &lt;xsl:variable name="SPACE" select="' '"/&gt;
  &lt;xsl:variable name="SLASH" select="'/'"/&gt;
  &lt;xsl:variable name="SLASH_SLASH" select="'//'"/&gt;
  &lt;xsl:variable name="LESSTHAN" select="'&amp;lt;'"/&gt;
  &lt;xsl:variable name="GREATERTHAN" select="'&amp;gt;'"/&gt;
  &lt;xsl:variable name="LPAREN" select="'('"/&gt;
  &lt;xsl:variable name="RPAREN" select="')'"/&gt;
  &lt;xsl:variable name="NEWLINE"&gt;&lt;xsl:text&gt;
&lt;/xsl:text&gt;&lt;/xsl:variable&gt;
  &lt;xsl:variable name="COMMA" select="','"/&gt;
  &lt;xsl:variable name="COMMA_SPACE" select="', '"/&gt;
  &lt;xsl:variable name="COMMA_NEWLINE"&gt;&lt;xsl:text&gt;,
&lt;/xsl:text&gt;&lt;/xsl:variable&gt;
  &lt;xsl:variable name="QUOTE"&gt;&lt;xsl:text&gt;'&lt;/xsl:text&gt;&lt;/xsl:variable&gt;
  &lt;xsl:variable name="DOUBLEQUOTE"&gt;&lt;xsl:text&gt;"&lt;/xsl:text&gt;&lt;/xsl:variable&gt;
  &lt;xsl:variable name="TO" select="' to '"/&gt;
  &lt;xsl:variable name="LBRACE" select="'{'"/&gt;
  &lt;xsl:variable name="RBRACE" select="'}'"/&gt;
  &lt;xsl:variable name="LBRACKET" select="'['"/&gt;
  &lt;xsl:variable name="RBRACKET" select="']'"/&gt;
  &lt;xsl:variable name="DOLLAR" select="'$'"/&gt;
  &lt;xsl:variable name="MINUS" select="'-'"/&gt;
  &lt;xsl:variable name="PLUS" select="'+'"/&gt;
  &lt;xsl:variable name="EQUAL" select="'='"/&gt;
  &lt;xsl:variable name="COLON" select="':'"/&gt;
  &lt;xsl:variable name="DOUBLE_COLON" select="'::'"/&gt;
  &lt;xsl:variable name="SEMICOLON" select="';'"/&gt;
  &lt;xsl:variable name="AT" select="'@'"/&gt;
  &lt;xsl:variable name="STAR" select="'*'"/&gt;
  &lt;xsl:variable name="QUESTIONMARK" select="'?'"/&gt;
  &lt;xsl:variable name="ASSIGN" select="':='"/&gt;
  &lt;xsl:variable name="SEPARATOR" select="';'"/&gt;
  &lt;xsl:variable name="PRAGMA_BEGIN" select="'(# '"/&gt;
  &lt;xsl:variable name="PRAGMA_END" select="' #)'"/&gt;


  &lt;xsl:template name="delimitedList"&gt;
    &lt;xsl:param name="delimiter" /&gt;
    &lt;xsl:param name="leftEncloser"/&gt;
    &lt;xsl:param name="rightEncloser" /&gt;
    &lt;xsl:param name="selector"/&gt;

    &lt;xsl:value-of select="$leftEncloser"/&gt;
    &lt;xsl:for-each select="*"&gt;
      &lt;xsl:apply-templates select="."/&gt;
      &lt;xsl:if test="not (position()=last())"&gt;        
        &lt;xsl:value-of select="$delimiter"/&gt;
      &lt;/xsl:if&gt;       
    &lt;/xsl:for-each&gt;
    &lt;xsl:value-of select="$rightEncloser"/&gt;
  &lt;/xsl:template&gt;   


  &lt;xsl:template name="parenthesizedList"&gt;
    &lt;xsl:param name="delimiter" select="$COMMA_SPACE"/&gt;
    &lt;xsl:call-template name="delimitedList"&gt;
      &lt;xsl:with-param name="delimiter" select="$delimiter" /&gt;
      &lt;xsl:with-param name="leftEncloser" select="$LPAREN"/&gt;
      &lt;xsl:with-param name="rightEncloser" select="$RPAREN"/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template name="commaSeparatedList"&gt;
    &lt;xsl:call-template name="delimitedList"&gt;
      &lt;xsl:with-param name="delimiter"&gt;
        &lt;xsl:value-of select="$COMMA_SPACE"/&gt;
      &lt;/xsl:with-param&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;!-- To resolve Bugzilla bug #3446, we now escape CR (#xD), NEL (#x85),
       and LINE SEPARATOR (#x2028) characters in text nodes and attribute values.
         Note that this template is invoked for a number of other purposes (e.g.,
       xqx:collation, xqx:namespaceDeclaration) where the presence of such
       characters would be invalid and thus are highly unlikely to appear. 
       If they do, then this template will happily escape them, deferring the
       error until the resulting XQuery expression is processed. --&gt;
  &lt;xsl:template name="quote"&gt;
    &lt;xsl:param name="item"/&gt;
    &lt;xsl:value-of select="$DOUBLEQUOTE"/&gt;
    &lt;xsl:call-template name="globalReplace"&gt;
      &lt;xsl:with-param name="stringToBeFixed"&gt;
        &lt;xsl:call-template name="globalReplace"&gt;
          &lt;xsl:with-param name="stringToBeFixed"&gt;
            &lt;xsl:call-template name="globalReplace"&gt;
              &lt;xsl:with-param name="stringToBeFixed"&gt;
                &lt;xsl:call-template name="globalReplace"&gt;
                  &lt;xsl:with-param name="stringToBeFixed"&gt;
                    &lt;xsl:call-template name="globalReplace"&gt;
                      &lt;xsl:with-param name="stringToBeFixed"&gt;
                        &lt;xsl:call-template name="globalReplace"&gt;
                          &lt;xsl:with-param name="stringToBeFixed"&gt;
                            &lt;xsl:value-of select="$item"/&gt;
                          &lt;/xsl:with-param&gt;
                          &lt;xsl:with-param name="toBeReplaced"&gt;&amp;amp;&lt;/xsl:with-param&gt;
                          &lt;xsl:with-param name="replacement"&gt;&amp;amp;amp;&lt;/xsl:with-param&gt;
                        &lt;/xsl:call-template&gt;
                                      &lt;/xsl:with-param&gt;
                      &lt;xsl:with-param name="toBeReplaced"&gt;&amp;lt;&lt;/xsl:with-param&gt;
                      &lt;xsl:with-param name="replacement"&gt;&amp;amp;lt;&lt;/xsl:with-param&gt;
                    &lt;/xsl:call-template&gt;
                  &lt;/xsl:with-param&gt;
                  &lt;xsl:with-param name="toBeReplaced" select="'&amp;#x85;'"/&gt;
                  &lt;xsl:with-param name="replacement"&gt;&amp;amp;#x85;&lt;/xsl:with-param&gt;
                &lt;/xsl:call-template&gt;
              &lt;/xsl:with-param&gt;
              &lt;xsl:with-param name="toBeReplaced" select="'&amp;#xD;'"/&gt;
              &lt;xsl:with-param name="replacement"&gt;&amp;amp;#xD;&lt;/xsl:with-param&gt;
            &lt;/xsl:call-template&gt;
          &lt;/xsl:with-param&gt;
          &lt;xsl:with-param name="toBeReplaced" select="'&amp;#x2028;'"/&gt;
          &lt;xsl:with-param name="replacement"&gt;&amp;amp;#x2028;&lt;/xsl:with-param&gt;
        &lt;/xsl:call-template&gt;
      &lt;/xsl:with-param&gt;
      &lt;xsl:with-param name="toBeReplaced"&gt;&lt;xsl:text&gt;"&lt;/xsl:text&gt;&lt;/xsl:with-param&gt;
      &lt;xsl:with-param name="replacement"&gt;&lt;xsl:text&gt;""&lt;/xsl:text&gt;&lt;/xsl:with-param&gt;
    &lt;/xsl:call-template&gt;
    &lt;xsl:value-of select="$DOUBLEQUOTE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template name="globalReplace"&gt;
    &lt;xsl:param name="stringToBeFixed"/&gt;
    &lt;xsl:param name="toBeReplaced"/&gt;
    &lt;xsl:param name="replacement"/&gt;
    &lt;xsl:choose&gt;
      &lt;xsl:when test="contains($stringToBeFixed, $toBeReplaced)"&gt;
        &lt;xsl:value-of select="concat(substring-before($stringToBeFixed, $toBeReplaced), $replacement)"/&gt;
        &lt;xsl:call-template name="globalReplace"&gt;
          &lt;xsl:with-param name="stringToBeFixed" select="substring-after($stringToBeFixed, $toBeReplaced)"/&gt;
          &lt;xsl:with-param name="toBeReplaced" select="$toBeReplaced"/&gt;
          &lt;xsl:with-param name="replacement" select="$replacement"/&gt;
        &lt;/xsl:call-template&gt;
      &lt;/xsl:when&gt;
      &lt;xsl:otherwise&gt;
        &lt;xsl:value-of select="$stringToBeFixed"/&gt;
      &lt;/xsl:otherwise&gt;
    &lt;/xsl:choose&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:QName | xqx:pragmaName | xqx:typeName | xqx:varName |
                       xqx:functionName | xqx:optionName |
                       xqx:atomicType | xqx:tagName"&gt;
    &lt;xsl:if test="@xqx:prefix"&gt;
      &lt;xsl:value-of select="@xqx:prefix"/&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:attributeName"&gt;
    &lt;xsl:choose&gt;
      &lt;xsl:when test="@xqx:prefix='xmlns'"&gt;
        &lt;xsl:message terminate="yes"&gt;Incorrect XQueryX: Attribute names are not permitted to
            have prefix 'xmlns'; use xqx:namespaceDeclaration to declare namespaces&lt;/xsl:message&gt;
      &lt;/xsl:when&gt;
      &lt;xsl:when test="@xqx:prefix"&gt;
        &lt;xsl:value-of select="@xqx:prefix"/&gt;
        &lt;xsl:value-of select="$COLON"/&gt;
        &lt;xsl:value-of select="."/&gt;
      &lt;/xsl:when&gt;
      &lt;xsl:when test=". = 'xmlns'"&gt;
        &lt;xsl:message terminate="yes"&gt;Incorrect XQueryX: Attribute names are not permitted to
           be 'xmlns'; use xqx:namespaceDeclaration to declare namespaces&lt;/xsl:message&gt;
      &lt;/xsl:when&gt;
      &lt;xsl:otherwise&gt;
        &lt;xsl:value-of select="."/&gt;
      &lt;/xsl:otherwise&gt;
    &lt;/xsl:choose&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:NCName"&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:rootExpr"&gt;
    &lt;xsl:value-of select="$SLASH"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:contextItemExpr"&gt;
    &lt;xsl:value-of select="$DOT"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:stringConstantExpr"&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:value"/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:integerConstantExpr
      | xqx:decimalConstantExpr
      | xqx:doubleConstantExpr"&gt;
    &lt;xsl:value-of select="xqx:value"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:varRef"&gt;
    &lt;xsl:value-of select="$DOLLAR"/&gt;
    &lt;xsl:if test="xqx:name/@xqx:prefix"&gt;
      &lt;xsl:value-of select="xqx:name/@xqx:prefix"/&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="xqx:name"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:pragma"&gt;
    &lt;xsl:value-of select="$PRAGMA_BEGIN"/&gt;
    &lt;xsl:apply-templates select="xqx:pragmaName"/&gt;
    &lt;xsl:value-of select="$SPACE"/&gt;
    &lt;xsl:value-of select="xqx:pragmaContents"/&gt;
    &lt;xsl:value-of select="$PRAGMA_END"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:extensionExpr"&gt;
    &lt;xsl:apply-templates select="xqx:pragma"/&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="xqx:argExpr"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;

&lt;!-- Response to Bugzilla bug #2528 --&gt;
   &lt;xsl:template match="xqx:functionCallExpr"&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="xqx:functionName/@xqx:prefix"&gt;
         &lt;xsl:value-of select="xqx:functionName/@xqx:prefix"/&gt;
         &lt;xsl:value-of select="$COLON"/&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:otherwise&gt;
         &lt;xsl:if test="xqx:functionName = 'node' or
                       xqx:functionName = 'document-node' or
                       xqx:functionName = 'element' or
                       xqx:functionName = 'attribute' or
                       xqx:functionName = 'schema-element' or
                       xqx:functionName = 'schema-attribute' or
                       xqx:functionName = 'processing-instruction' or
                       xqx:functionName = 'comment' or
                       xqx:functionName = 'text' or
                       xqx:functionName = 'item' or
                       xqx:functionName = 'if' or
                       xqx:functionName = 'typeswitch' or
                       xqx:functionName = 'empty-sequence'"&gt;
           &lt;xsl:variable name="message"&gt;&lt;xsl:text&gt;Incorrect XQueryX:&lt;/text&gt;
              &lt;xsl:text&gt;function calls must not use unqualified "reserved" name "&lt;/xsl:text&gt;
              &lt;xsl:value-of select="xqx:functionName"/&gt;&lt;xsl:text&gt;"&lt;/xsl:text&gt;&lt;/xsl:variable&gt;
           &lt;xsl:message terminate="yes"&gt;&lt;xsl:value-of select="$message"/&gt;&lt;/xsl:message&gt;
         &lt;/xsl:if&gt;
       &lt;/xsl:otherwise&gt;
     &lt;/xsl:choose&gt;
     &lt;xsl:value-of select="xqx:functionName"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="xqx:arguments"&gt;
         &lt;xsl:for-each select="xqx:arguments"&gt;
           &lt;xsl:call-template name="parenthesizedList"/&gt;
         &lt;/xsl:for-each&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:otherwise&gt;
         &lt;xsl:value-of select="$LPAREN"/&gt;
         &lt;xsl:value-of select="$RPAREN"/&gt;
       &lt;/xsl:otherwise&gt;
     &lt;/xsl:choose&gt;
   &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:constructorFunctionExpr"&gt;
    &lt;xsl:apply-templates select="xqx:typeName"/&gt;
    &lt;xsl:for-each select="xqx:argExpr"&gt;
      &lt;xsl:call-template name="parenthesizedList"/&gt;
    &lt;/xsl:for-each&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:unaryMinusOp | xqx:unaryPlusOp"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="self::xqx:unaryPlusOp"&gt;&lt;xsl:value-of select="$PLUS"/&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:unaryMinusOp"&gt;&lt;xsl:value-of select="$MINUS"/&gt;&lt;/xsl:when&gt;
     &lt;/xsl:choose&gt;
    &lt;xsl:apply-templates select="xqx:operand"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:addOp | xqx:subtractOp | xqx:multiplyOp
                     | xqx:divOp | xqx:idivOp | xqx:modOp"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
     &lt;xsl:apply-templates select="xqx:firstOperand"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="self::xqx:addOp"&gt;&lt;xsl:value-of select="$PLUS"/&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:subtractOp"&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;xsl:value-of select="$MINUS"/&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:multiplyOp"&gt;&lt;xsl:value-of select="$STAR"/&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:divOp"&gt;&lt;xsl:text&gt; div &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:idivOp"&gt;&lt;xsl:text&gt; idiv &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:modOp"&gt;&lt;xsl:text&gt; mod &lt;/xsl:text&gt;&lt;/xsl:when&gt;
     &lt;/xsl:choose&gt;
    &lt;xsl:apply-templates select="xqx:secondOperand"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:eqOp | xqx:neOp | xqx:ltOp
                     | xqx:gtOp | xqx:leOp | xqx:geOp"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
     &lt;xsl:apply-templates select="xqx:firstOperand"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="self::xqx:eqOp"&gt;&lt;xsl:text&gt; eq &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:neOp"&gt;&lt;xsl:text&gt; ne &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:ltOp"&gt;&lt;xsl:text&gt; lt &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:gtOp"&gt;&lt;xsl:text&gt; gt &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:leOp"&gt;&lt;xsl:text&gt; le &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:geOp"&gt;&lt;xsl:text&gt; ge &lt;/xsl:text&gt;&lt;/xsl:when&gt;
     &lt;/xsl:choose&gt;
    &lt;xsl:apply-templates select="xqx:secondOperand"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:equalOp | xqx:notEqualOp | xqx:lessThanOp
                     | xqx:greaterThanOp | xqx:lessThanOrEqualOp | xqx:greaterThanOrEqualOp"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
     &lt;xsl:apply-templates select="xqx:firstOperand"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="self::xqx:equalOp"&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;xsl:value-of select="$EQUAL"/&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:notEqualOp"&gt;
         &lt;xsl:text&gt; !&lt;/xsl:text&gt;&lt;xsl:value-of select="$EQUAL"/&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:lessThanOp"&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;xsl:value-of select="$LESSTHAN"/&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:greaterThanOp"&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;xsl:value-of select="$GREATERTHAN"/&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:lessThanOrEqualOp"&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;xsl:value-of select="$LESSTHAN"/&gt;
         &lt;xsl:value-of select="$EQUAL"/&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
       &lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:greaterThanOrEqualOp"&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;xsl:value-of select="$GREATERTHAN"/&gt;
         &lt;xsl:value-of select="$EQUAL"/&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
       &lt;/xsl:when&gt;
     &lt;/xsl:choose&gt;
    &lt;xsl:apply-templates select="xqx:secondOperand"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:isOp | xqx:nodeBeforeOp | xqx:nodeAfterOp"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
     &lt;xsl:apply-templates select="xqx:firstOperand"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="self::xqx:isOp"&gt;&lt;xsl:text&gt; is &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:nodeBeforeOp"&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
         &lt;xsl:value-of select="$LESSTHAN"/&gt;&lt;xsl:value-of select="$LESSTHAN"/&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:nodeAfterOp"&gt;&lt;xsl:text&gt; &lt;/xsl:text&gt;
         &lt;xsl:value-of select="$GREATERTHAN"/&gt;&lt;xsl:value-of select="$GREATERTHAN"/&gt;
         &lt;xsl:text&gt; &lt;/xsl:text&gt;&lt;/xsl:when&gt;
     &lt;/xsl:choose&gt;
    &lt;xsl:apply-templates select="xqx:secondOperand"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:andOp | xqx:orOp"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
     &lt;xsl:apply-templates select="xqx:firstOperand"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="self::xqx:andOp"&gt;&lt;xsl:text&gt; and &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:orOp"&gt;&lt;xsl:text&gt; or &lt;/xsl:text&gt;&lt;/xsl:when&gt;
     &lt;/xsl:choose&gt;
    &lt;xsl:apply-templates select="xqx:secondOperand"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:unionOp | xqx:intersectOp | xqx:exceptOp"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
     &lt;xsl:apply-templates select="xqx:firstOperand"/&gt;
     &lt;xsl:choose&gt;
       &lt;xsl:when test="self::xqx:unionOp"&gt;&lt;xsl:text&gt; union &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:intersectOp"&gt;&lt;xsl:text&gt; intersect &lt;/xsl:text&gt;&lt;/xsl:when&gt;
       &lt;xsl:when test="self::xqx:exceptOp"&gt;&lt;xsl:text&gt; except &lt;/xsl:text&gt;&lt;/xsl:when&gt;
     &lt;/xsl:choose&gt;
    &lt;xsl:apply-templates select="xqx:secondOperand"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:sequenceExpr"&gt;
    &lt;xsl:for-each select="."&gt;
      &lt;xsl:call-template name="parenthesizedList"&gt;
        &lt;xsl:with-param name="delimiter" select="$COMMA_NEWLINE"/&gt;
      &lt;/xsl:call-template&gt;
    &lt;/xsl:for-each&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:rangeSequenceExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:startExpr"/&gt;
    &lt;xsl:value-of select="$TO"/&gt;
    &lt;xsl:apply-templates select="xqx:endExpr"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:forClause"&gt;
    &lt;xsl:text&gt; for &lt;/xsl:text&gt;
    &lt;xsl:call-template name="commaSeparatedList"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;

  &lt;xsl:template match="xqx:forClauseItem"&gt;
    &lt;xsl:apply-templates/&gt;
  &lt;/xsl:template&gt;

  &lt;xsl:template match="xqx:forExpr"&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
    &lt;xsl:text&gt;    in &lt;/xsl:text&gt;
        &lt;xsl:apply-templates/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:letClause"&gt;
    &lt;xsl:text&gt; let &lt;/xsl:text&gt;
    &lt;xsl:call-template name="commaSeparatedList"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;

  &lt;xsl:template match="xqx:letClauseItem"&gt;
    &lt;xsl:apply-templates/&gt;
  &lt;/xsl:template&gt;

  &lt;xsl:template match="xqx:letExpr"&gt;
    &lt;xsl:value-of select="$ASSIGN"/&gt;
    &lt;xsl:apply-templates/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:returnClause"&gt;
    &lt;xsl:text&gt; return &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:whereClause"&gt;
    &lt;xsl:text&gt; where &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:collation"&gt;
    &lt;xsl:text&gt; collation &lt;/xsl:text&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item"&gt;
        &lt;xsl:value-of select="."/&gt;
      &lt;/xsl:with-param&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:emptyOrderingMode"&gt;
    &lt;xsl:value-of select="$SPACE"/&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:orderingKind"&gt;
    &lt;xsl:value-of select="$SPACE"/&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:orderModifier"&gt;
    &lt;xsl:apply-templates select="*"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:orderBySpec"&gt;
    &lt;xsl:apply-templates select="xqx:orderByExpr"/&gt;
    &lt;xsl:value-of select="$SPACE"/&gt;
    &lt;xsl:apply-templates select="xqx:orderModifier"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:orderByClause"&gt;
    &lt;xsl:if test="xqx:stable"&gt;
      &lt;xsl:text&gt; stable&lt;/xsl:text&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:text&gt; order by &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:orderBySpec[1]"/&gt;
    &lt;xsl:for-each select="xqx:orderBySpec[position() &gt; 1]"&gt;
      &lt;xsl:value-of select="$COMMA_SPACE"/&gt;
      &lt;xsl:apply-templates select="."/&gt;
    &lt;/xsl:for-each&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;


&lt;!-- Surrounding FLWOR expressions with parentheses completes the set --&gt;
  &lt;xsl:template match="xqx:flworExpr"&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:ifThenElseExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:text&gt; if &lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:ifClause"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
    &lt;xsl:text&gt; then &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:thenClause"/&gt;
    &lt;xsl:text&gt; else &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:elseClause"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:positionalVariableBinding"&gt;
    &lt;xsl:text&gt; at &lt;/xsl:text&gt;
    &lt;xsl:value-of select="$DOLLAR"/&gt;
    &lt;xsl:if test="@xqx:prefix"&gt;
      &lt;xsl:value-of select="@xqx:prefix"/&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:variableBinding"&gt;
    &lt;xsl:value-of select="$DOLLAR"/&gt;
    &lt;xsl:if test="@xqx:prefix"&gt;
      &lt;xsl:value-of select="@xqx:prefix"/&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="."/&gt;
    &lt;xsl:if test="parent::xqx:typeswitchExprCaseClause"&gt;
      &lt;xsl:text&gt; as &lt;/xsl:text&gt;
    &lt;/xsl:if&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:typedVariableBinding" name="typedVariableBinding"&gt;
    &lt;xsl:value-of select="$DOLLAR"/&gt;
    &lt;xsl:apply-templates select="xqx:varName"/&gt;
    &lt;xsl:apply-templates select="xqx:typeDeclaration"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:quantifiedExprInClause"&gt;
    &lt;xsl:apply-templates select="xqx:typedVariableBinding"/&gt;
    &lt;xsl:text&gt; in &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:sourceExpr"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:quantifiedExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:value-of select="xqx:quantifier"/&gt;
    &lt;xsl:value-of select="$SPACE"/&gt;
    &lt;xsl:apply-templates select="xqx:quantifiedExprInClause[1]"/&gt;
    &lt;xsl:for-each select="xqx:quantifiedExprInClause[position() &gt; 1]"&gt;
      &lt;xsl:value-of select="$COMMA_SPACE"/&gt;
      &lt;xsl:apply-templates select="."/&gt;
    &lt;/xsl:for-each&gt;
    &lt;xsl:text&gt; satisfies &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:predicateExpr"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:instanceOfExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:argExpr"/&gt;
    &lt;xsl:text&gt; instance of &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:sequenceType"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:castExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:argExpr"/&gt;
    &lt;xsl:text&gt; cast as &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:singleType"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:castableExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:argExpr"/&gt;
    &lt;xsl:text&gt; castable as &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:singleType"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:treatExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:argExpr"/&gt;
    &lt;xsl:text&gt; treat as &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:sequenceType"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:typeswitchExprCaseClause"&gt;
    &lt;xsl:text&gt; case &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:variableBinding"/&gt;
    &lt;xsl:apply-templates select="xqx:sequenceType"/&gt;
    &lt;xsl:text&gt; return &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:resultExpr"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:typeswitchExprDefaultClause"&gt;
    &lt;xsl:text&gt; default &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:variableBinding"/&gt;
    &lt;xsl:text&gt; return &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:resultExpr"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:typeswitchExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:text&gt;typeswitch&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:argExpr"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
    &lt;xsl:apply-templates select="xqx:typeswitchExprCaseClause"/&gt;
    &lt;xsl:apply-templates select="xqx:typeswitchExprDefaultClause"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:validateExpr"&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:text&gt; validate &lt;/xsl:text&gt;
    &lt;xsl:value-of select="xqx:validationMode"/&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="xqx:argExpr"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:xpathAxis"&gt;
    &lt;xsl:value-of select="."/&gt;
    &lt;xsl:value-of select="$DOUBLE_COLON"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:predicates"&gt;
    &lt;xsl:for-each select="*"&gt;
      &lt;xsl:value-of select="$LBRACKET"/&gt;
      &lt;xsl:apply-templates select="."/&gt;
      &lt;xsl:value-of select="$RBRACKET"/&gt;
    &lt;/xsl:for-each&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:star"&gt;
    &lt;xsl:value-of select="$STAR"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:Wildcard[*]"&gt;
    &lt;xsl:apply-templates select="*[1]"/&gt;
    &lt;xsl:if test="*[2]"&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
      &lt;xsl:apply-templates select="*[2]"/&gt;
    &lt;/xsl:if&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:Wildcard[not(*)]"&gt;
    &lt;xsl:value-of select="$STAR"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template name="simpleWildcard" match="xqx:simpleWildcard"&gt;
    &lt;xsl:apply-templates select="xqx:star"/&gt;
    &lt;xsl:apply-templates select="xqx:QName"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:textTest"&gt;
    &lt;xsl:text&gt;text()&lt;/xsl:text&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:commentTest"&gt;
    &lt;xsl:text&gt;comment()&lt;/xsl:text&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:anyKindTest"&gt;
    &lt;xsl:text&gt;node()&lt;/xsl:text&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:piTest"&gt;
    &lt;xsl:text&gt;processing-instruction&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:value-of select="*"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:documentTest"&gt;
    &lt;xsl:text&gt;document-node&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:nameTest"&gt;
    &lt;xsl:if test="@xqx:prefix"&gt;
      &lt;xsl:value-of select="@xqx:prefix"/&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:attributeTest"&gt;
    &lt;xsl:text&gt;attribute&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:for-each select="xqx:attributeName"&gt;
      &lt;xsl:call-template name="simpleWildcard"/&gt;
    &lt;/xsl:for-each&gt;
    &lt;xsl:if test="xqx:typeName"&gt;
      &lt;xsl:value-of select="$COMMA"/&gt;
      &lt;xsl:apply-templates select="xqx:typeName"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:elementTest"&gt;
    &lt;xsl:text&gt;element&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:for-each select="xqx:elementName"&gt;
      &lt;xsl:call-template name="simpleWildcard"/&gt;
    &lt;/xsl:for-each&gt;
    &lt;xsl:if test="xqx:typeName"&gt;
      &lt;xsl:value-of select="$COMMA"/&gt;
      &lt;xsl:apply-templates select="xqx:typeName"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:if test="xqx:nillable"&gt;
      &lt;xsl:value-of select="$QUESTIONMARK"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:schemaElementTest"&gt;
    &lt;xsl:text&gt;schema-element&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:if test="@xqx:prefix"&gt;
      &lt;xsl:value-of select="@xqx:prefix"/&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="."/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:schemaAttributeTest"&gt;
    &lt;xsl:text&gt;schema-attribute&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LPAREN"/&gt;
    &lt;xsl:if test="@xqx:prefix"&gt;
      &lt;xsl:value-of select="@xqx:prefix"/&gt;
      &lt;xsl:value-of select="$COLON"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="."/&gt;
    &lt;xsl:value-of select="$RPAREN"/&gt;
  &lt;/xsl:template&gt;


  &lt;!-- rewrote test expression per Bugzilla Bug #2523 --&gt;
  &lt;xsl:template match="xqx:stepExpr"&gt;
    &lt;xsl:if test="preceding-sibling::xqx:stepExpr"&gt;
      &lt;xsl:value-of select="$SLASH"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:apply-templates select="*"/&gt;
  &lt;/xsl:template&gt;


  &lt;!-- deleted xqx:parenthesizedExpr per Bugzilla Bug #4963 --&gt;

  &lt;xsl:template match="xqx:filterExpr"&gt;
    &lt;xsl:apply-templates/&gt;
  &lt;/xsl:template&gt;


  &lt;!-- rewrote pathExpr template per Bugzilla Bug #2523 --&gt;
  &lt;xsl:template match="xqx:pathExpr"&gt;
    &lt;xsl:apply-templates select="xqx:rootExpr | xqx:stepExpr"/&gt;
  &lt;/xsl:template&gt;


  &lt;!-- To resolve Bugzilla bug #3446, we now escape NL (#xA) and TAB (#x9)
       characters in attribute values --&gt;
  &lt;xsl:template match="xqx:attributeConstructor"&gt;
    &lt;xsl:value-of select="$SPACE"/&gt;
    &lt;xsl:apply-templates select="xqx:attributeName"/&gt;
    &lt;xsl:value-of select="$EQUAL"/&gt;
    &lt;xsl:choose&gt;
      &lt;xsl:when test="xqx:attributeValue"&gt;
        &lt;xsl:call-template name="globalReplace"&gt;
          &lt;xsl:with-param name="stringToBeFixed"&gt;
            &lt;xsl:call-template name="globalReplace"&gt;
              &lt;xsl:with-param name="stringToBeFixed"&gt;
                &lt;xsl:call-template name="quote"&gt;
                  &lt;xsl:with-param name="item"&gt;
                    &lt;xsl:call-template name="globalReplace"&gt;
                      &lt;xsl:with-param name="stringToBeFixed"&gt;
                        &lt;xsl:call-template name="globalReplace"&gt;
                          &lt;xsl:with-param name="stringToBeFixed"&gt;
                            &lt;xsl:value-of select="xqx:attributeValue"/&gt;
                          &lt;/xsl:with-param&gt;
                          &lt;xsl:with-param name="toBeReplaced"&gt;&lt;xsl:text&gt;{&lt;/xsl:text&gt;&lt;/xsl:with-param&gt;
                          &lt;xsl:with-param name="replacement"&gt;&lt;xsl:text&gt;{{&lt;/xsl:text&gt;&lt;/xsl:with-param&gt;
                        &lt;/xsl:call-template&gt;
                      &lt;/xsl:with-param&gt;
                      &lt;xsl:with-param name="toBeReplaced"&gt;&lt;xsl:text&gt;}&lt;/xsl:text&gt;&lt;/xsl:with-param&gt;
                      &lt;xsl:with-param name="replacement"&gt;&lt;xsl:text&gt;}}&lt;/xsl:text&gt;&lt;/xsl:with-param&gt;
                    &lt;/xsl:call-template&gt;
                  &lt;/xsl:with-param&gt;
                &lt;/xsl:call-template&gt;
              &lt;/xsl:with-param&gt;
              &lt;xsl:with-param name="toBeReplaced" select="'&amp;#xA;'"/&gt;
              &lt;xsl:with-param name="replacement"&gt;&amp;amp;#xA;&lt;/xsl:with-param&gt;
            &lt;/xsl:call-template&gt;
          &lt;/xsl:with-param&gt;
          &lt;xsl:with-param name="toBeReplaced" select="'&amp;#x9;'"/&gt;
          &lt;xsl:with-param name="replacement"&gt;&amp;amp;#x9;&lt;/xsl:with-param&gt;
        &lt;/xsl:call-template&gt;
      &lt;/xsl:when&gt;
      &lt;xsl:otherwise&gt;
        &lt;xsl:value-of select="$DOUBLEQUOTE"/&gt;
        &lt;xsl:for-each select="./xqx:attributeValueExpr/xqx:*"&gt;
          &lt;xsl:value-of select="$LBRACE"/&gt;
            &lt;xsl:apply-templates select="."/&gt;
          &lt;xsl:value-of select="$RBRACE"/&gt;
        &lt;/xsl:for-each&gt;
        &lt;xsl:value-of select="$DOUBLEQUOTE"/&gt;
      &lt;/xsl:otherwise&gt;
    &lt;/xsl:choose&gt;
  &lt;/xsl:template&gt;


  &lt;!-- replaced xqx:namespaceDeclaration per Bugzilla Bug #5343 --&gt;
  &lt;xsl:template match="xqx:namespaceDeclaration"&gt;
    &lt;xsl:text&gt; xmlns&lt;/xsl:text&gt;
    &lt;xsl:if test="xqx:prefix"&gt;
      &lt;xsl:text&gt;:&lt;/xsl:text&gt;
      &lt;xsl:value-of select="xqx:prefix"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:value-of select="$EQUAL"/&gt;
    &lt;xsl:call-template name="quote"&gt;
<span>      &lt;xsl:with-param name="item"&gt;
        &lt;xsl:call-template name="globalReplace"&gt;
          &lt;xsl:with-param name="stringToBeFixed"&gt;
            &lt;xsl:call-template name="globalReplace"&gt;
              &lt;xsl:with-param name="stringToBeFixed"&gt;
                &lt;xsl:value-of select="xqx:uri"/&gt;
              &lt;/xsl:with-param&gt;
              &lt;xsl:with-param name="toBeReplaced"&gt;
                &lt;xsl:text&gt;{&lt;/xsl:text&gt;
              &lt;/xsl:with-param&gt;
              &lt;xsl:with-param name="replacement"&gt;
                &lt;xsl:text&gt;{{&lt;/xsl:text&gt;
              &lt;/xsl:with-param&gt;
            &lt;/xsl:call-template&gt;
          &lt;/xsl:with-param&gt;
          &lt;xsl:with-param name="toBeReplaced"&gt;
            &lt;xsl:text&gt;}&lt;/xsl:text&gt;
          &lt;/xsl:with-param&gt;
          &lt;xsl:with-param name="replacement"&gt;
            &lt;xsl:text&gt;}}&lt;/xsl:text&gt;
          &lt;/xsl:with-param&gt;
        &lt;/xsl:call-template&gt;
      &lt;/xsl:with-param&gt;
</span>    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:attributeList"&gt;
    &lt;xsl:apply-templates select="*"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:elementContent"&gt;
    &lt;xsl:for-each select="*"&gt;
      &lt;xsl:if test="not(self::xqx:elementConstructor)"&gt;
         &lt;xsl:value-of select="$LBRACE"/&gt;
      &lt;/xsl:if&gt;
      &lt;xsl:apply-templates select="."/&gt;
      &lt;xsl:if test="not(self::xqx:elementConstructor)"&gt;
         &lt;xsl:value-of select="$RBRACE"/&gt;
      &lt;/xsl:if&gt;
    &lt;/xsl:for-each&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:elementConstructor"&gt;
    &lt;xsl:value-of select="$LESSTHAN"/&gt;
    &lt;xsl:apply-templates select="xqx:tagName"/&gt;
    &lt;xsl:apply-templates select="xqx:attributeList"/&gt;
    &lt;xsl:value-of select="$GREATERTHAN"/&gt;
    &lt;xsl:apply-templates select="xqx:elementContent"/&gt;
    &lt;xsl:value-of select="$LESSTHAN"/&gt;
    &lt;xsl:value-of select="$SLASH"/&gt;
    &lt;xsl:apply-templates select="xqx:tagName"/&gt;
    &lt;xsl:value-of select="$GREATERTHAN"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:tagNameExpr"&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:computedElementConstructor"&gt;
    &lt;xsl:text&gt; element &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:tagName"/&gt;
    &lt;xsl:apply-templates select="xqx:tagNameExpr"/&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="xqx:contentExpr"/&gt;     
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:computedAttributeConstructor"&gt;
    &lt;xsl:text&gt; attribute &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:tagName"/&gt;
    &lt;xsl:apply-templates select="xqx:tagNameExpr"/&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="xqx:valueExpr"/&gt;     
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:computedDocumentConstructor"&gt;
    &lt;xsl:text&gt; document {&lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:text&gt; }&lt;/xsl:text&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:computedTextConstructor"&gt;
    &lt;xsl:text&gt; text&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:computedCommentConstructor"&gt;
    &lt;xsl:text&gt; comment&lt;/xsl:text&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:piTargetExpr"&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


&lt;!-- Move value braces into computedPIConstructor template from this template, Bugzilla bug #3442 --&gt;
  &lt;xsl:template match="xqx:piValueExpr"&gt;
    &lt;xsl:apply-templates select="*"/&gt;
  &lt;/xsl:template&gt;


&lt;!-- Move value braces into this template from piValueExpr template, Bugzilla bug #3442 --&gt;
  &lt;xsl:template match="xqx:computedPIConstructor"&gt;
    &lt;xsl:text&gt; processing-instruction &lt;/xsl:text&gt;
    &lt;xsl:value-of select="xqx:piTarget"/&gt;
    &lt;xsl:apply-templates select="xqx:piTargetExpr"/&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:apply-templates select="xqx:piValueExpr"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:unorderedExpr"&gt;
    &lt;xsl:text&gt; unordered&lt;/xsl:text&gt;
        &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:text&gt; &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:text&gt; &lt;/xsl:text&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:orderedExpr"&gt;
    &lt;xsl:text&gt; ordered&lt;/xsl:text&gt;
        &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:text&gt; &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:text&gt; &lt;/xsl:text&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:versionDecl"&gt;
    &lt;xsl:text&gt; xquery version &lt;/xsl:text&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:version"/&gt;
    &lt;/xsl:call-template&gt;
    &lt;xsl:value-of select="$SEPARATOR"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:namespaceDecl"&gt;
    &lt;xsl:text&gt;declare namespace &lt;/xsl:text&gt;
    &lt;xsl:value-of select="xqx:prefix"/&gt;
    &lt;xsl:value-of select="$EQUAL"/&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:uri"/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:defaultNamespaceDecl"&gt;
    &lt;xsl:text&gt;declare default &lt;/xsl:text&gt;
    &lt;xsl:value-of select="xqx:defaultNamespaceCategory"/&gt;
    &lt;xsl:text&gt; namespace &lt;/xsl:text&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:uri"/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:defaultCollationDecl"&gt;
    &lt;xsl:text&gt;declare default collation &lt;/xsl:text&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="."/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:baseUriDecl"&gt;
    &lt;xsl:text&gt;declare base-uri &lt;/xsl:text&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="."/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;

  &lt;xsl:template match="xqx:constructionDecl"&gt;
    &lt;xsl:text&gt;declare construction &lt;/xsl:text&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:orderingModeDecl"&gt;
    &lt;xsl:text&gt;declare ordering &lt;/xsl:text&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:emptyOrderingDecl"&gt;
    &lt;xsl:text&gt;declare default order &lt;/xsl:text&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:copyNamespacesDecl"&gt;
    &lt;xsl:text&gt;declare copy-namespaces &lt;/xsl:text&gt;
    &lt;xsl:value-of select="xqx:preserveMode"/&gt;
    &lt;xsl:value-of select="$COMMA"/&gt;
    &lt;xsl:value-of select="xqx:inheritMode"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:optionDecl"&gt;
    &lt;xsl:text&gt;declare option &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:optionName"/&gt;
    &lt;xsl:value-of select="$SPACE"/&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:optionContents"/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:voidSequenceType"&gt;
    &lt;xsl:text&gt;empty-sequence()&lt;/xsl:text&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:occurrenceIndicator"&gt;
    &lt;xsl:value-of select="."/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:anyItemType"&gt;
    &lt;xsl:text&gt;item()&lt;/xsl:text&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:sequenceType"&gt;
    &lt;xsl:apply-templates select="*"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:singleType"&gt;
    &lt;xsl:apply-templates select="xqx:atomicType"/&gt;
    &lt;xsl:if test="xqx:optional"&gt;
      &lt;xsl:text&gt;?&lt;/xsl:text&gt;
    &lt;/xsl:if&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:typeDeclaration"&gt;
    &lt;xsl:text&gt; as &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="*"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:varDecl"&gt;
    &lt;xsl:text&gt;declare variable &lt;/xsl:text&gt;
    &lt;xsl:value-of select="$DOLLAR"/&gt;
    &lt;xsl:apply-templates select="xqx:varName"/&gt;
    &lt;xsl:apply-templates select="xqx:typeDeclaration"/&gt;
    &lt;xsl:if test="xqx:external"&gt;
      &lt;xsl:text&gt; external &lt;/xsl:text&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:if test="xqx:varValue"&gt;
      &lt;xsl:value-of select="$ASSIGN"/&gt;
      &lt;xsl:apply-templates select="xqx:varValue"/&gt;
    &lt;/xsl:if&gt;
  &lt;/xsl:template&gt;


&lt;!-- Part of fix for Bugzilla bug #3520 --&gt;
  &lt;xsl:template match="xqx:targetLocation"&gt;
    &lt;xsl:choose&gt;
      &lt;xsl:when test="position()=1"&gt; at &lt;/xsl:when&gt;
      &lt;xsl:otherwise&gt;,&amp;#xD;  &lt;/xsl:otherwise&gt;
    &lt;/xsl:choose&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="."/&gt;
    &lt;/xsl:call-template&gt;
  &lt;/xsl:template&gt;


&lt;!-- Modified to fix Bugzilla bug #3520 --&gt;
  &lt;xsl:template match="xqx:schemaImport"&gt;
    &lt;xsl:text&gt; import schema &lt;/xsl:text&gt;
    &lt;xsl:if test="xqx:defaultElementNamespace"&gt;
      &lt;xsl:text&gt; default element namespace &lt;/xsl:text&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:if test="xqx:namespacePrefix"&gt;
      &lt;xsl:text&gt; namespace &lt;/xsl:text&gt;
      &lt;xsl:value-of select="xqx:namespacePrefix"/&gt;
      &lt;xsl:value-of select="$EQUAL"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:targetNamespace"/&gt;
    &lt;/xsl:call-template&gt;
    &lt;xsl:apply-templates select="xqx:targetLocation"/&gt;
  &lt;/xsl:template&gt;


&lt;!-- Modified to fix Bugzilla bug #3520 --&gt;
  &lt;xsl:template match="xqx:moduleImport"&gt;
    &lt;xsl:text&gt; import module &lt;/xsl:text&gt;
    &lt;xsl:if test="xqx:namespacePrefix"&gt;
      &lt;xsl:text&gt; namespace &lt;/xsl:text&gt;
      &lt;xsl:value-of select="xqx:namespacePrefix"/&gt;
      &lt;xsl:value-of select="$EQUAL"/&gt;
    &lt;/xsl:if&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:targetNamespace"/&gt;
    &lt;/xsl:call-template&gt;
    &lt;xsl:apply-templates select="xqx:targetLocation"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:param"&gt;
    &lt;xsl:value-of select="$DOLLAR"/&gt;
    &lt;xsl:apply-templates select="xqx:varName"/&gt;
    &lt;xsl:apply-templates select="xqx:typeDeclaration"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:paramList"&gt;
    &lt;xsl:call-template name="parenthesizedList"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:functionBody"&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
    &lt;xsl:value-of select="$LBRACE"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
    &lt;xsl:apply-templates/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
    &lt;xsl:value-of select="$RBRACE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:functionDecl"&gt;
    &lt;xsl:text&gt;declare function &lt;/xsl:text&gt;
    &lt;xsl:apply-templates select="xqx:functionName"/&gt;
    &lt;xsl:apply-templates select="xqx:paramList"/&gt;
    &lt;xsl:apply-templates select="xqx:typeDeclaration"/&gt;
    &lt;xsl:apply-templates select="xqx:functionBody"/&gt;
    &lt;xsl:if test="xqx:externalDefinition"&gt;
      &lt;xsl:text&gt; external &lt;/xsl:text&gt;
    &lt;/xsl:if&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:queryBody"&gt;
    &lt;xsl:apply-templates select="*"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;

  &lt;xsl:template match="xqx:moduleDecl"&gt;
    &lt;xsl:text&gt; module namespace &lt;/xsl:text&gt;
    &lt;xsl:value-of select="xqx:prefix"/&gt;
    &lt;xsl:value-of select="$EQUAL"/&gt;
    &lt;xsl:call-template name="quote"&gt;
      &lt;xsl:with-param name="item" select="xqx:uri" /&gt;
    &lt;/xsl:call-template&gt;
    &lt;xsl:value-of select="$SEPARATOR"/&gt;
    &lt;xsl:value-of select="$NEWLINE"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:prolog"&gt;
    &lt;xsl:for-each select="*"&gt;
      &lt;xsl:apply-templates select="."/&gt;
      &lt;xsl:value-of select="$SEPARATOR"/&gt;
      &lt;xsl:value-of select="$NEWLINE"/&gt;
    &lt;/xsl:for-each&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:libraryModule"&gt;
    &lt;xsl:apply-templates select="xqx:moduleDecl"/&gt;
    &lt;xsl:apply-templates select="xqx:prolog"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:mainModule"&gt;
    &lt;xsl:apply-templates select="xqx:prolog"/&gt;
    &lt;xsl:apply-templates select="xqx:queryBody"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="xqx:module" priority="2"&gt;
    &lt;xsl:apply-templates select="*"/&gt;
  &lt;/xsl:template&gt;


  &lt;xsl:template match="/xqx:*"&gt;
   &lt;xsl:message terminate="yes"&gt;Incorrect XQueryX:
      The only top-level element permitted is xqx:module&lt;/xsl:message&gt;
  &lt;/xsl:template&gt;


&lt;/xsl:stylesheet&gt;
</pre></div>
</div>
<div class="xqueryx">
<div class="div1">
<h2><a id="xqueryx-id-mime-type" name="xqueryx-id-mime-type"></a>C
The <code>application/xquery+xml</code> Media Type</h2>
<p>This Appendix specifies the media type for XQueryX Version 1.0.
XQueryX is the XML syntax of a language, XQuery, for querying over
data from XML data sources, as specified in <a href=
"#xquery">[XQuery 1.0: An XML Query Language (Second
Edition)]</a>.</p>
<div class="note">
<p class="prefix"><b>Note:</b></p>
<p>Specification of media types is described in <a href=
"#RFC3023">[RFC 3023]</a>.</p>
</div>
<div class="div2">
<h3><a id="xqueryx-mime-introduction" name=
"xqueryx-mime-introduction"></a>C.1 Introduction</h3>
<p>This document, together with its normative references, defines
the XML syntax for the XML Query language XQuery Version 1.0. This
Appendix specifies the <code>application/xquery+xml</code> media
type, which is intended to be used for transmitting queries
expressed in the XQueryX syntax.</p>
<p>This media type is being submitted to the IESG for review,
approval, and registration with IANA.</p>
<p>This document was prepared by members of the W3C XML Query
Working Group. Please send comments to public-qt-comments@w3.org, a
public mailing list with archives at <a href=
"http://lists.w3.org/Archives/Public/public-qt-comments">http://lists.w3.org/Archives/Public/public-qt-comments</a>.</p>
</div>
<div class="div2">
<h3><a id="xqueryx-mime-registration" name=
"xqueryx-mime-registration"></a>C.2 Registration of MIME Media Type
<code>application/xquery+xml</code></h3>
<p>MIME media type name: <code>application</code></p>
<p>MIME subtype name: <code>xquery+xml</code></p>
<p>Required parameters: none</p>
<p>Optional parameters: <code>charset</code></p>
<p>This parameter has identical semantics to the
<code>charset</code> parameter of the <code>application/xml</code>
media type as specified in [RFC 3023].</p>
<div class="div3">
<h4><a id="xqueryx-mime-encoding" name=
"xqueryx-mime-encoding"></a>C.2.1 Encoding Considerations</h4>
<p>By virtue of XQueryX content being XML, it has the same
considerations when sent as "<code>application/xquery+xml</code>"
as does XML. See [RFC 3023], section 3.2.</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-security" name=
"xqueryx-mime-security"></a>C.2.2 Security Considerations</h4>
<p>Queries written in XQuery may cause arbitrary URIs or IRIs to be
dereferenced. Therefore, the security issues of [RFC3987] Section 8
should be considered. In addition, the contents of resources
identified by <code>file:</code> URIs can in some cases be
accessed, processed and returned as results. XQuery expressions can
invoke any of the functions defined in XQuery 1.0 and XPath 2.0
Functions and Operators, including <code>file-exists()</code>; a
<code>doc()</code> function also allows local filesystem probes as
well as access to any URI-defined resource accessible from the
system evaluating the XQuery expression.</p>
<p>XQuery is a full declarative programming language, and supports
user-defined functions, external function libraries (modules)
referenced by URI, and system-specific "native" functions.</p>
<p>Arbitrary recursion is possible, as is arbitrarily large memory
usage, and implementations may place limits on CPU and memory
usage, as well as restricting access to system-defined
functions.</p>
<p>The XML Query Working group is working on a facility to allow
XQuery expressions to be used to create and update persistent data.
Untrusted queries should not be given write access to data.</p>
<p>Furthermore, because the XQuery language permits extensions, it
is possible that application/xquery may describe content that has
security implications beyond those described here.</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-interoperability" name=
"xqueryx-mime-interoperability"></a>C.2.3 Interoperability
Considerations</h4>
<p>See <a href=
"http://www.w3.org/TR/xquery/#id-xquery-conformance">Section 5
Conformance</a><sup><small>XQ</small></sup>.</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-pubspec" name=
"xqueryx-mime-pubspec"></a>C.2.4 Published specification</h4>
<p>This media type registration is for XQueryX documents as
described by the XQueryX 1.0 specification, which is located at
<a href=
"http://www.w3.org/TR/xqueryx/">http://www.w3.org/TR/xqueryx/</a>.
It is also appropriate to use this media type with later versions
of the XQueryX language.</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-applications" name=
"xqueryx-mime-applications"></a>C.2.5 Applications That Use This
Media Type</h4>
<p>The public <a href="http://www.w3.org/XML/Query/">XQuery Web
page</a> lists more than two dozen implementations of the XQuery
language, both proprietary and open source. Some of these are known
to support XQueryX.</p>
<p>This new media type is being registered to allow for deployment
of XQueryX on the World Wide Web.</p>
<p>There is no experimental, vendor specific, or personal tree
predecessor to "application/xquery+xml", reflecting the fact that
no applications currently recognize it. This new type is being
registered in order to allow for the expected deployment of XQueryX
1.0 on the World Wide Web, as a first class XML application.</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-additional" name=
"xqueryx-mime-additional"></a>C.2.6 Additional Information</h4>
<div class="div4">
<h5><a id="xqueryx-mime-recognizing" name=
"xqueryx-mime-recognizing"></a>C.2.6.1 Recognizing XQuery Files
("Magic Numbers")</h5>
<p>Although no byte sequences can be counted on to consistently
identify XQueryX, XQueryX documents will have the sequence
"http://www.w3.org/2005/XQueryX" to identify the XQueryX namespace.
This sequence will normally be found in a namespace attribute of
the first element in the document.</p>
</div>
<div class="div4">
<h5><a id="xqueryx-mime-extensions" name=
"xqueryx-mime-extensions"></a>C.2.6.2 File Extensions</h5>
<p>The most common file extension in use for XQueryX is
<code>.xqx</code>.</p>
</div>
<div class="div4">
<h5><a id="xqueryx-mime-macfiletype" name=
"xqueryx-mime-macfiletype"></a>C.2.6.3 Macintosh File Type
Code(s)</h5>
<p>The appropriate Macintosh file type code is
<code>TEXT</code>.</p>
</div>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-author" name=
"xqueryx-mime-author"></a>C.2.7 Person and Email Address to Contact
For Further Information</h4>
<p>Jim Melton, Oracle Corp., <a href=
"mailto:jim.melton@oracle.com">jim.melton@oracle.com</a></p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-intended-usage" name=
"xqueryx-mime-intended-usage"></a>C.2.8 Intended Usage</h4>
<p>COMMON</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-restrictions" name=
"xqueryx-mime-restrictions"></a>C.2.9 Restrictions on usage</h4>
<p>The intended usage of this media type is for interchange of
XQueryX expressions.</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-owner" name="xqueryx-mime-owner"></a>C.2.10
Author/Change Controller</h4>
<p>XQuery was produced by, and is maintained by, the World Wide Web
Consortium's XML Query Working Group. The W3C has change control
over this specification.</p>
</div>
<div class="div3">
<h4><a id="xqueryx-mime-fragments" name=
"xqueryx-mime-fragments"></a>C.2.11 Fragment Identifiers</h4>
<p>For documents labeled as "<code>application/xquery+xml</code>",
the fragment identifier notation is exactly that for
"<code>application/xml</code>", as specified in [RFC 3023].</p>
</div>
</div>
</div>
</div>
<div class="div1">
<h2><a id="changelog" name="changelog"></a>D Changes since the
First Edition (Non-Normative)</h2>
<p>The changes made to this document, other than trivial editorial
changes, are described in detail in the <a href=
"http://www.w3.org/XML/2007/qt-errata/xqueryx-errata.html">Errata</a>
to the first edition. The rationale for each erratum is explained
in the corresponding Bugzilla database entry. The following table
summarizes the errata that have been applied.</p>
<table border="1" cellpadding="5" width="100%">
<thead>
<tr class="diff-add" title="Added for second edition">
<td>Erratum</td>
<td>Bugzilla</td>
<td>Category</td>
<td>Description</td>
</tr>
</thead>
<tbody>
<tr class="diff-add" title="XQX.E1">
<td>Erratum <a href=
"http://www.w3.org/XML/2007/qt-errata/xqueryx-errata.html#E1">E1</a></td>
<td><a href=
"http://www.w3.org/Bugs/Public/show_bug.cgi?id=4924">Arguably
incorrect element definition in XQueryX's Schema.</a></td>
<td>Editorial.</td>
<td>The published XQueryX 1.0 schema defined many elements using
anonymous complex types. That made it infeasible to extend the
content model of those elements in other specifications that define
XQueryX extensions corresponding perhaps to XQuery extensions.
While conceptually simple, a number of changes were required to
ensure that all elements are defined using named complex
types.</td>
</tr>
<tr class="diff-add" title="XQX.E2 and XQX.E3">
<td>Errata <a href=
"http://www.w3.org/XML/2007/qt-errata/xqueryx-errata.html#E2">E2</a>
and <a href=
"http://www.w3.org/XML/2007/qt-errata/xqueryx-errata.html#E3">E3</a></td>
<td><a href=
"http://www.w3.org/Bugs/Public/show_bug.cgi?id=4963">Removed
element xqx:parenthesizedExpr used in example.</a></td>
<td>Editorial.</td>
<td>The XQueryX solution to Example 4 incorrectly contained an
&lt;xqx:parenthesizedExpr&gt; element. That element was changed to
an &lt;xqx:sequenceExpr&gt; element. The XSLT stylesheet in
Appendix B contained a template for the transformation of
&lt;xqx:parenthesizedExpr&gt; elements that was unnecessary and
confusing; that template was deleted.</td>
</tr>
<tr class="diff-add" title="XQX.E4">
<td>Erratum <a href=
"http://www.w3.org/XML/2007/qt-errata/xqueryx-errata.html#E4">E4</a></td>
<td><a href=
"http://www.w3.org/Bugs/Public/show_bug.cgi?id=5323">Bug in XQueryX
applet</a></td>
<td>Editorial.</td>
<td>The XQueryX 1.0 Recommendation linked to an obsolete version of
the XQuery 1.0 grammar applet. The proper link has now been
used.</td>
</tr>
<tr class="diff-add" title="XQX.E5">
<td>Erratum <a href=
"http://www.w3.org/XML/2007/qt-errata/xqueryx-errata.html#E5">E5</a></td>
<td><a href=
"http://www.w3.org/Bugs/Public/show_bug.cgi?id=5343">Problem with
{{ and }} in a Namespace Declaration Attribute</a></td>
<td>Editorial.</td>
<td>The XSLT stylsheet in Appendix B contained a template for the
transformation of &lt;xqx:namespaceDeclaration&gt; elements that
failed to correctly "escape" curly braces in the same manner as
does the template for the transformation of
&lt;xqx:attributeConstructor&gt; elements. That template has been
corrected.</td>
</tr>
<tr class="diff-add" title="XQX.E6">
<td>Erratum <a href=
"http://www.w3.org/XML/2007/qt-errata/xqueryx-errata.html#E6">E6</a></td>
<td><a href=
"http://www.w3.org/Bugs/Public/show_bug.cgi?id=6377">[XQX]
non-normative notes</a></td>
<td>Editorial.</td>
<td>Added text in <a href="#Introduction"><b>1 Introduction</b></a>
to clarify that Notes are non-normative.</td>
</tr>
<tr class="diff-add">
<td>(None)</td>
<td>(None)</td>
<td>Editorial</td>
<td>Corrected typographical error in MIME appendix ("XSLT" should
have been "XQueryX").</td>
</tr>
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