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    <title>W3C XML Query (XQuery)</title>
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    <div class="quote"><p><i>The un-queried life is not worth living</i><br />
      &#8212; <cite>Socrates (Plato, The Apology, 38a)</cite></p></div>

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    <h1>W3C XML Query (XQuery)</h1>

    <div class="toplinkgroup">
      <ul id="overviewlink">
	<li><a class="tlgleft forexecutives" href="#overview"><span class="forexecutives" title="High level overview">High level Overview</span></a></li>
	<li><a class="forarchitects" href="#architects"><span class="forarchitects" title="XQuery for the Systems Analyst or Architect">Architects &#38;&#160;Analysts</span></a></li>
	<li><a class="forusers" href="#learning"><span class="forusers" title="Getting Started With XQuery; Using XQuery; FAQ">For Users</span></a></li>
	<li><a class="forimplementers" href="#hardcore"><span class="forimplementers" title="Resources for Implementers">For Implementers</span></a></li>
	<li><a class="news" href="#news"><span title="What&apos;s New at W3C and in the Industry">What's New</span></a></li>
	<li><a class="fordocuments tlgright" href="#specs"><span class="fordocuments" title="The Working Group, Specifications, Implementations">Reference</span></a></li>
      </ul>
    </div>

    <div class="htmlsucks"><a name="overview" id="overview"> </a></div>
    <div class="topic overview forexecutives">
      <h2>30,000 Foot View</h2>
      <h3>XQuery: 30,000 foot view (CIO, CTO, Journalist)</h3>
      <p>XQuery is a standardized language for combining
      documents, databases, Web pages and almost anything
      else.  It is very widely implemented.  It is powerful
      and easy to learn.</p>

      <p>XQuery is replacing proprietary middleware languages and
      Web Application development languages.  XQuery is replacing
      complex Java or C++ programs with a few lines of code.
      XQuery is simpler to work with and easier to maintain
      than many other alternatives.</p>
      <p class="message">Do more with less.</p>
    </div>

    <div class="contents">
      <h2>Contents</h2>
      <ul>
	<li><a href="#news">News</a></li>
	<li><a href="#architects">XQuery for the Systems Analyst or Architect</a></li>
	<li><a href="#learning">Getting Started With XQuery; Using XQuery; FAQ</a></li>
	<li><a href="#hardcore">Resources for Implementers</a></li>
	<li><a href="#specs">Documents and Current Status: Specifications and Working Group Notes</a></li>
      </ul>
    </div>

    <div class="topics"><!--* needed for CSS *-->

    <div class="htmlsucks"><a name="architects" id="architects"> </a></div>
    <div class="topic forarchitects">
	<h2>Architects</h2>
	<h3>XQuery for the systems analyst or architect</h3>
	<p>The W3C XML Query Working Group worked with the W3C XML Schema Working
	Group and the W3C XSL Working Group to make a set of specifications that
	all work together.</p>
	<p>Use XQuery to take data from multiple databases, from
	XML files, from remote Web documents, even from CGI scripts,
	and to produce XML results that you can process with XSLT.</p>
	<p>Use XQuery on the back-end of a Web server, or to generate
	Enterprise-wide executive reports.
	<!--* [link to more information coming soon] *-->
	</p>

	<h3><a name="examples">Examples of XML Query In Action</a></h3>

	<p>Submit your entry by sending mail to liam at w3.org,
	with [XQuery site] in the subject. Remember to give the full
	URL, and remember that it must be public.</p>

	<!--* Alphabetical. using rel=nofollow for non-w3c-members *-->
	<!--* A *-->
	<p><a rel="nofollow" href="http://www.oxfordaasc.com/content/browse">Oxford
	  African American Studies Center</a> is a site published
	by Oxford University Press using an XQuery system.  See the
	Site Credits link there for more details.</p>

	<p><a rel="nofollow" href="http://www.learnalberta.ca/">Alberta learning Center</a>
	for education in the Canadian province of Alberta; e.g. see
	the Search link, which does not require registration.</p>

	<p><a rel="nofollow" href="http://authormapper.com/">AuthorMapper</a>
	shows authors of scientific papers and articles broken down
	by geography and subject.  The site is by Springer.</p>


	<!--* B *-->
	<p><a rel="nofollow" href="http://tools.businessweek.com/BSchool_Comparator/">Business Week Business School Comparator</a>
	is said to use XQuery to let users compare universities and
	business schools; it didn't seem to work for me, so maybe IE only?
	Or maybe I'm not cut out for business.</p>

	<p><a rel="nofollow" href="http://bx.businessweek.com/">Business Exchange</a>, another Business Week site, uses XQuery to drive a site where, it
	says, usiness professionals can collaborate and network
	around business topics.</p>


	<!--* C *-->

	<!--* W3C member: *-->
	<p><a rel="nofollow" href="http://www.cq.com/corp/show.do?page=products_legislativeimpact">CQ Legislative Impact</a> is
	a tool to explore how pending US legislation might affect
	existing laws.</p>

	<!--* D *-->
	<p><a rel="nofollow" href="http://www.gael.fr/drb/">Data Request Broker</a>,
	DRB, at Gael Consultant, is an open source Java API for processing
	heterogeneous data.  It includes XQuery and Scema support.  License is LGPL.</p>

	<p>The
	<a rel="nofollow" href="http://rotunda.upress.virginia.edu/dmde/">Dolley
	  Madison Digital Edition</a> by the University of Virginia Press.</p>

	<!--* F *-->
	<!--* participant: *-->
	<p><a href="http://www.fromoldbooks.org/">fromoldbooks.org</a>
	  has an
	  <a href="http://www.fromoldbooks.org/Search/">image search engine</a>
	  powered by XML Query; you can see the text of the queries
	  (follow the About link on the Search page). This is also used
	  by <a href="http://www.holoweb.net/~liam/">Liam Quin</a>'s
	  <a href="http://www.holoweb.net/~liam/pictures/Search/">Photograph
	      search page</a>.</p>

	<!--* M *-->

	<!--* Member and participant: *-->
	<p><a href="http://markmail.org/">MarkMail</a> is an XQuery-based
	application for searching and visualising mailing lists.</p>

	<!--* N *-->
	<p>The <a rel="nofollow" href="http://content.nejm.org/">New England Journal of Medicine</a>
	uses XQuery to search and retrieve comprehensive case summaries and
	graphical icons that identify available supplemental content such as
	lab reports, radiological scans, histopathology slides, and photos
	associated with a particular case record.</p>

	<!--* O *-->
	<p><a href="http://labs.oreilly.com/">O'Reilly Labs</a> use
	XQuery to power code search, image search,
	statistics and more.</p>

	<!--* P *-->
	<p><a rel="nofollow"
	  href="http://pop.greenwood.com/">Pop Culture Universe</a>
	is a Web site about American popular culture, including movies,
	books and music, with over 300
	publications indexed and searchable.</p>

	<!--* S *-->
	<p><a rel="nofollow" href="http://www.springerimages.com/">Springer
	    Images</a> uses XQuery
	to search and retrieve scientific images, photos, tables, charts etc. for researchers.</p>
	<p><a rel="nofollow" href="http://springerexemplar.com/">Springer Exemplar</a>
	provides a full-text interface to large numbers of scientific
	and technical journals, together with tools for narrowing down
	search results.</p>

	<!--* W *-->
	<p><a rel="nofollow" href="http://www.customselect.wiley.com/">Wiley
	  Custom Select</a> is a Web site for creating custom course books.</p>

	<p><a rel="nofollow" href="http://www.worldcolor.com/">Worldcolor</a>
	has a custom publishing system using XQuery; they have
	a <a href="http://www.worldcolor.com/uploadedfiles/wcp_demo-9.swf">Flash demo.</a></p>


	<p>Have you got a Web site that's powered by XML Query?
	A success story to share?  Contact liam at w3.org.</p>
      </div>

    <div class="htmlsucks"><a name="learning" id="learning"> </a></div>
      <div class="topic forusers">
	<h2>Users</h2>
	<h3>XQuery: choosing an implementation</h3>
	<p>There are over 40 different software packages that
	support XML Query in some way.  Things to look for
	include availability of support, platforms, price,
	performance, all the usual issues, but you should also
	ask whether the software supports the final syntax from
	the W3C Recommendation or implements an earlier draft.
	Another XML Query specific feature is support for
	XML files, for fetching documents via HTTP, and for
	connecting to relational (or other) data sources: that is,
	whether the package lives up to the XML Query promise of
	unifying access to many different forms of information.</p>
	<p><a href="#implementations">List of XQuery Implementations</a></p>
	<h3>Learning</h3>
	<p>There are some books listed; there are also people
	offering training and tutorials.  If there is anything
	you found particular helpful, <a href="#contact">let us know</a>!</p>
	<p>There are also some mailing lists devoted to XML
	and to XML Query.  You should look at the archives of each list
	before posting; you'll also need to subscribe to the list before
	you can post to it in most cases.</p>
	<dl>
	  <dt><a href="http://lists.w3.org/Archives/Public/www-ql/">www-ql</a></dt>
	  <dd><p>This is the W3C public mailing list on query languages, including (but not
	    limited to) discussion on the XML Query project.
	    Do not use this to send comments on the specification, such as errata or feature
	    requests; see the Status section in each specification for instructions on
	    how to send comments to the Working Group.</p></dd>
	    <dt><a href="http://x-query.com/mailman/listinfo/talk">xquery-talk</a></dt>
	    <dd><p>A mailing list hosted at x-query.com, especially for discussing XQuery.</p></dd>
	    <dt><a href="http://lists.xml.org/">xml-dev</a></dt>
	    <dd><p>Probably the most widely-known list for discussing XML.</p></dd>
	</dl>
	<h3>Reading the Specs</h3>
	<p>W3C Specifications are aimed first and foremost
	at programmers writing implementations of them.
	We also try to make them readable for people trying
	to learn the language&#8212;but given a choice between
	making a standard precise and making it easy to read,
	we have to make it precise.</p>
	<p>If you are fairly technical, you could start by
	reading the XML Query specification, and the
	XQuery Use Cases document has some examples.
	Many people would rather look for a book or tutorial.</p>
	<!--* <p>[link to FAQ]</p> *-->
      </div>

    <div class="htmlsucks"><a name="hardcore" id="hardcore"> </a></div>
      <div class="topic forimplementers">
	<h2>Implementers</h2>
	<h3>XQuery for the implementer: hard core query</h3>
	<p>Implementers: what would you most like to see here?
	What would have helped you the most?</p>

	<h3>The XQuery Test Suite</h3>
	<p>The <a href="test-suite/">XQuery Test Suite</a> was
	developed primarily to help the XML Query Working Group show that
	the specification could be implemented in such a way that queries
	would work on multiple systems - that is, <em>interoperably</em>.
	We are not currently doing active work on the test suite, but
	implementers continue to find it useful.  It is <em>not</em> a
	conformance test suite: implementers are responsible for producing
	their own statements of conformance, and W3C does not have the
	resources to test or verify those statements.</p>

    <h3>Related Test Suites</h3>
    <p>There are additional test suites associated with XPath and XQuery.
    </p>
    <p>&mdash; <a href="http://dev.w3.org/2007/xquery-update-10-test-suite/">XQuery Update Facility 1.0 Test Suite</a></p>
    <p>&mdash; <a href="http://dev.w3.org/2007/xpath-full-text-10-test-suite/">XQuery and XPath Full Text 1.0 Test Suite</a> (Joint)</p>

	<h3>Static Typing and Formal Semantics</h3>
	<p>XPath 2 has <i>typed values</i>; that is, the language
	associates a value type with each expression, variable or
	function.  The set of possible types is that defined by
	W3C XML Schema, augmented by user-defined types derived from
	those basic Schema types using an external schema.  The way
	in which an XPath or XQuery system derives and checks the type of
	an expression is defined formally, using a mathematical notation,
	in the <a href="/TR/xquery-semantics/">XQuery 1.0 and XPath 2.0 Formal Semantics</a> Recommendation.</p>

	<p>Note that both external W3C Schema support and static typing
	are optional features, so not all implementations support them.</p>

	<h3>Conformance Statements</h3>
	<p>You will often see things in the specifications marked as
	being <i>implementation defined</i>.  You must document
	what your implementation does for each of these.</p>
      </div>

    <div class="htmlsucks"><a name="specs" id="specs"> </a></div>
      <div id="documents" class="topic fordocuments">
	<div class="docpicture"><!--* work round CSS limitation *-->
	<h2>Documents</h2>
	<h3>Specifications and Working Group Notes</h3>
	<p>The W3C XML Query Working Group has published a lot
	of documents.  Many of these were done together with the
	<a href="http://www.w3.org/Style/XSL/">XSL Working Group</a> and
	are marked Joint.</p>
	<p>Both of these Working Groups also met with the
	<a href="http://www.w3.org/XML/Schema">W3C XML Schema Working Group</a>,
	to make sure our specifications all work together.</p>

	<div class="specgroup">
	  <p>First, the main XML Query documents:</p>
	  <div class="spec"><p><a href="/TR/xquery/"><cite>XQuery 1.0: An XML Query Language</cite></a> (W3C Recommendation)</p></div>
	  <div class="spec"><p><a href="/TR/xqueryx/"><cite>XML Syntax for XQuery 1.0 (XQueryX)</cite></a> (W3C Recommendation)</p></div>
	  <div class="spec"><p><a href="/TR/xquery-requirements/"><cite>XML Query (XQuery) 1.0 Requirements</cite></a> (W3C Working Group Note)</p></div>
	  <div class="spec"><p><a href="/TR/xquery-use-cases/"><cite>XML Query 1.0 Use Cases</cite></a> (W3C Working Group Note)</p></div>

	  <div class="spec"><p><a href="/TR/xquery-xpath-parsing/"><cite>Building a Tokenizer for XPath or XQuery</cite></a> (Joint Note)</p></div>
	</div>

	<div class="specgroup">
	  <p>XSLT 2.0 shares a lot of the same functionality:</p>
	  <div class="spec"><p><a href="/TR/xslt20/"><cite>XSL Transformations (XSLT) Version 2.0</cite></a> (by the XSL Working Group)</p></div>
	</div>

	<div class="specgroup">
	  <p>XQuery 1.0 and XSLT 2.0 both use XPath 2.0:</p>
	  <div class="spec"><p><a href="../../TR/xpath20/"><cite>XML Path Language (XPath) 2.0</cite></a> (W3C Recommendation; Joint)</p></div>
	  <div class="spec"><p><a href="/TR/xpath20req/"><cite>XPath Requirements Version 2.0</cite></a> (Joint)</p></div>
	</div>

	<div class="specgroup">
	  <p>XPath in turn is built on a number of Joint specifications :</p>
	  <div class="spec"><p><a href="/TR/xpath-datamodel/"><cite>XQuery 1.0 and XPath 2.0 Data Model</cite></a> (W3C Recommendation; Joint) </p></div>
	  <div class="spec"><p><a href="/TR/xslt-xquery-serialization/"><cite>XSLT 2.0 and XQuery 1.0 Serialization</cite></a> (W3C Recommendation; Joint)</p></div>
	  <div class="spec"><p><a href="/TR/xquery-semantics/"><cite>XQuery 1.0 and XPath 2.0 Formal Semantics</cite></a> (W3C Recommendation; Joint)</p></div>
	  <div class="spec"><p><a href="/TR/xpath-functions/"><cite>XQuery 1.0 and XPath 2.0 Functions and Operators</cite></a> (W3C Recommendation; Joint)</p></div>
	</div>

	<div class="specgroup">
	  <p>The XML Query and XSL Working Groups are developing Full-Text Search for XPath 2.0 and, of course, XQuery 1.0;
	  when finished, this will then be available for use in XQuery and XSLT:</p>
	  <div class="spec"><p><a href="/TR/xpath-full-text-10-requirements/"><cite>XML Query and XPath Full-Text Requirements</cite></a> (Joint)</p>
	  </div>
	  <div class="spec"><p><a href="/TR/xpath-full-text-10-use-cases/"><cite>XML Query and XPath Full-Text Use Cases</cite></a> (Joint)</p>
	  </div>
	  <div class="spec"><p><a href="/TR/xpath-full-text-10/"><cite>XQuery 1.0 and XPath 2.0 Full-Text</cite></a> (Joint)</p>
	  </div>
	</div>

	<div class="specgroup">
	    <p>The XML Query Working Group is developing an update facility
	    for XQuery; this
	  lets you write Query expressions that change documents and perhaps save the result.</p>
	  <div class="spec"><p><a href="/TR/xquery-update-10/"><cite>XQuery Update Facility</cite></a></p></div>
	  <div class="spec"><p><a href="/TR/xquery-update-10-requirements/"><cite>XQuery Update Facility Requirements</cite></a></p>
	  </div>
	  <div class="spec"><p><a href="/TR/xquery-update-10-use-cases/"><cite>XQuery Update Facility Use Cases</cite></a></p></div>
	</div>

	<div class="specgroup">
	  <p>The XML Query Working Group is working on the next
	  version of XML Query, XQuery 1.1.</p>
	  <div class="spec"><p><a href="/TR/xquery-11-requirements/"><cite>XML Query (XQuery) 1.1 Requirements</cite></a></p></div>
	  <div class="spec"><p><a href="/TR/xquery-11-use-cases/"><cite>XML Query (XQuery) 1.1 Use Cases</cite></a></p></div>
	  <div class="spec"><p><a href="/TR/xquery-11/"><cite>XML Query (XQuery) 1.1</cite></a></p></div>
	</div>

	<div class="specgroup" id="xquery-sx">
	    <!--* href="http://2006.xmlconference.org/proceedings/38/presentation.pdf">XQueryP: An XML Application Development Language *-->
	    <p>The XML Query Working Group is working on <a name="xquery-sx">Scripting Extensions for XQuery</a>.
	The goal is to investigate whether adding imperative (procedural)
	features such as variable assigment and explicit sequencing to
	XQuery makes the language significantly more powerful or
	easier to use.</p>
	  <div class="spec"><p><a href="/TR/xquery-sx-10"><cite>XQuery Scripting Extension 1.0</cite></a></p></div>
	  <div class="spec"><p><a href="/TR/xquery-sx-10-requirements/"><cite>XQuery Scripting Extension 1.0 Requirements</cite></a></p></div>
	  <div class="spec"><p><a href="/TR/xquery-sx-10-use-cases/"><cite>XQuery Scripting Extension 1.0 Use Cases</cite></a></p></div>
	</div>

    </div></div> <!--* workaround *-->
    </div>

    <div class="news">
      <h2><a id="news" name="news">News</a></h2>
      <div id="newsintro">
	<h3>Recently added...</h3>
	<p>Send your XQuery-related news item to
	liam&#64;w3.org, with [XQuery] in the Subject.
	Note, I am sorry that sometimes I miss announcements.
	I get hundreds, sometimes thousands, of messages in a day.
	If your announcement does not appear within one week,
	send it again and please accept my apologies!</p>
	<p class="message">
	<a href="Overview.rss">Subscribe</a> to the RSS feed.</p>
      </div>

      <!--*
      <div class="item" id="ni20100724">
	<h3>title</h3>
	<div class="date">Sat, 24 Jul 2011</div>
	<p><a rel="details" href="uri">item</a> desc</p></div>
    *-->

      <div class="item" id="ni20111023">
	<h3>BaseX 7.0.01 Released</h3>
	<div class="date">Sun, 23 Oct 2011</div>
	<p><a rel="details" href="http://www.basex.org/">BaseX 7.0.01</a> has been released;
	BasX 7 can store fils of any format, is said to be faster,
	includes support for JSON, accessing SQL databases, digital signagures,
	and more language support for Full Text searching.</p></div>

      <div class="item" id="ni20110815">
	<h3>W3C Java Applets updated</h3>
	<div class="date">Thu, 15 Sep 2010</div>
	<p><a rel="details" href="http://www.w3.org/2011/08/qt-applets/">W3C Java Applets</a>
	have been updated to incorporate the latest versions of the specifications for
	the XPath and XQuery 3.0 drafts as well as for the
	1.0 documents.</p>
      </div>

      <div class="item" id="ni20110121">
	<h3>CBCL Releases XQSharp 2.0</h3>
	<div class="date">Fri, 21 Jan 2011</div>
	<p><a rel="details" href="http://www.xqsharp.com/">XQSharp 2.0</a> released.  This version brings full XSLT 2.0 support to the .NET Framework.
	XQSharp is an XSLT 2.0 and XQuery 1.0 processor for the .NET Framework.</p></div>

      <div class="item" id="ni20110117">
	<h3>BaseX 6.5 Released</h3>
	<div class="date">Mon, 17 Jan 2011</div>
	<p><a rel="details" href="http://www.basex.org/">BaseX 6.5</a> has been released;
	many new features from the XQuery 3.0 draft, Full Text,
	function libraries, text compression, enhanced collection suppoer.</p></div>

      <div class="item" id="ni20110112">
	<h3>title</h3>
	<div class="date">Wed, 12 Jan 2011</div>
	<p>OxygenXML released <a rel="details" href="http://www.oxygenxml.com/download_oxygenxml_editor.html"> &lt;oXygen&gt; XML Editor and Author version 12.1</a>, with improvements to XQuery and XSLT debuggers, including XSLT 2.0 and XQuery Types in Variables and XWatch Views and enhanced XSLT Context Information., amongst many other changes.</p></div>

      <div class="item" id="ni20101027">
	<h3>Qizx 4.1 released</h3>
	<div class="date">Wed, 27 Oct 2010</div>
	<p><a rel="details" href="http://www.xmlmind.com/qizx/">Qizx 4.1</a>
	includes more of the features from the draft for
	XQuery 1.1 [now called XQuery 3.0], support for non-XML
	documents, and can store over 1,000 Gigabytes of XML.</p></div>

      <div class="item" id="ni20100907">
	<h3>XQSharp 1.5 Released</h3>
	<div class="date">Tue, 07 Sep 2010</div>
	<p>CBCL Released <a rel="details" href="http://www.xqsharp.com/">XQSharp 1.5</a> which
	includes large performance improvements especially for recursive functions.</p></div>

      <div class="item" id="ni20100728">
	<h3>Zorba 1.4 released</h3>
	<div class="date">Wed, 28 Jul 2010</div>
	<p><a rel="details" href="http://www.zorba-xquery.com/index.php/zorba-14-released/">Zorba 1.4 (XQuery Processor)</a> has been released.
	This release comes with an
	<a href="http://www.zorba-xquery.com/doc/zorba-latest/zorba/xqdoc/xhtml/">extended function library</a> and support for the
	<a href="http://www.w3.org/TR/xquery-11/#id-switch">[draft] XQuery 1.1 switch expression</a>.</p></div>

      <div class="item" id="ni20100724">
	<h3>MarkLogic XQJ API released</h3>
	<div class="date">Sat, 24 Jul 2010</div>
	<p><a rel="details" href="http://www.xqjapi.com/marklogic/">MarkLogic XQJ API</a> has been released.</p></div>

      <div class="item" id="ni20100720">
	<h3>Sedna XDIB released</h3>
	<div class="date">Tue, 20 Jul 2010</div>
	<p><a rel="details" href="https://addons.mozilla.org/en-US/firefox/addon/199900/">XDIB</a>
	(XQuery In a Browser) is a build of the Firefox Web browser
	that incorporated XQuery support using sedna.</p></div>

      <div class="item" id="ni20100616">
	<h3>Qizx 4.0 released</h3>
	<div class="date">Wed, 16 Jun 2010</div>
	<p><a rel="details" href="http://www.xmlmind.com/qizx/">Qizx 4.0</a>
	is now available; new features include HTTP server,
	some initial scripting support, and XQuery Services.</p></div>

      <div class="item" id="ni20100301">
	<h3>W3C Java Applets updated</h3>
	<div class="date">Mon, 01 Mar 2010</div>
	<p><a rel="details" href="http://www.w3.org/2010/02/qt-applets/">W3C Java Applets</a>
	have been updated to incorporate the latest versions of the specifications for
	XPath 2.1, XQuery 1.1, Full Text and Update.</p>
      </div>

      <div class="item" id="ni20101211">
	<h3>BaseX 6.0 Released</h3>
	<div class="date">Sun, 11 Jan 2009</div>
	<p><a rel="details" href="http://basex.org/">BaseX 6.0</a>
	has been released.  New features include
	an
	implementation of XQuery Update, enhanced client/server architecture
	and extended XQuery Full Text features</p>
      </div>

      <div class="item" id="ni20091230">
	<h3>IBM XML Feature Pack Released</h3>
	<div class="date">Fri, 11 Dec 2009</div>
	<p>IBM announced support for XPath 2.0, XSLT 2.0, and XQuery 1.0 via the <a rel="details" href="http://www-01.ibm.com/software/webservers/appserv/was/featurepacks/xml/">WebSphere Application Server V7.0 Feature Pack for XML 1.0.0.0</a> -
	IBM says that this release fully supports the W3C standards,
	introduces a Java API that unifies all three languages,
	and is optimized for performance and reliability in
	application server environments.
	See also the <a href="http://webspherecommunity.blogspot.com/2009/11/websphere-xml-feature-pack-v10-released.html">WebSphere announcement.</a></p>
      </div>
      <div class="item" id="ni20091110">
	<h3>XQuantum 1.50 released</h3>
	<div class="date">Tue, 10 Nov 2009</div>
	<p><a rel="details" href="http://www.cogneticsystems.com/">Cognetic Systems</a> - XQuantum Server 1.50 - released for Windows and Linux
	Features include XQuery 1.0 conformance,
	static typing, query modules, and full-text search based on
	a subset of the draft standard.  The server uses XML indexing and query
	optimization to access large XML data stores.</p>
      </div>
      <div class="item" id="ni20090915b2">
	<h3>XQuantum 1.5 beta released</h3>
	<div class="date">Tue, 15 Sep 2009</div>
	<p><a rel="details" href="http://www.cogneticsystems.com/">Cognetic Systems</a>
	say they have released a beta version of XQuantum 1.5, with
	some full-text support, static typing, and modules.</p>
      </div>

      <div class="item" id="ni20090915a">
	<h3>XQJ for Sedna</h3>
	<div class="date">Tue, 15 Sep 2009</div>
	<p>An
	<a rel="details" href="http://www.cfoster.net/sedna/xqj/">XQJ driver for Sedna</a>
	has been released, conforming to
	the XQuery API for Java Test Compatibility Kit.</p>
      </div>

      <div class="item" id="ni20090914">
	<h3>XQSharp Released</h3>
	<div class="date">Tue, 15 Sep 2009</div>
	<p><a href="http://www.cbcl.co.uk/cbcl/">CBCL UK</a> has released
	<a rel="details" href="http://www.xqsharp.com/xqsharp/">XQSharp</a>
	for the .NET framework.
	All optional XQuery 1.0 features are supported,
	including modules, static typing, full namespace axis
	and schema import.</p>
      </div>

      <div class="item" id="ni20090901">
	<h3>BaseX 5.7 Released</h3>
	<div class="date">Wed, 02 Sep 2009</div>
	<p><a rel="details" href="http://basex.org/">BaseX 5.7</a>
	has been released.  New features include
	support for the XQuery Full Text draft,  improved XQuery and index
	performance, enhanced XQuery editing facilities and improved
	client/server stability</p>
      </div>

      <div class="item" id="ni20090522">
	<h3>Qizx 3.0 released</h3>
	<div class="date">Fri, 22 May 2009</div>
	<p><a rel="details" href="http://www.xmlmind.com/qizx/">Qizx 3.0</a>
	is now available, with XQuery Full-Text support as
	well as speedups and memory improvements.</p></div>

      <div class="item" id="ni20090403">
	<h3>Qizx 3.0-beta released</h3>
	<div class="date">Fri, 03 Apr 2009</div>
	<p><a rel="details" href="http://www.xmlmind.com/qizx/">Qizx Beta 3</a>
	is now available. new features include extensive Full-Text
	support as well as performance enhancements.</p></div>

      <div class="item" id="ni20090202">
	<h3>XBird added</h3>
	<div class="date">Fri, 02 Jan 2009</div>
	<p><a rel="details" href="http://code.google.com/p/xbird/">XBird</a>
	light-weight embeddable
	open source Java implementation
	added to the list of implementations.</p></div>

      <div class="item" id="ni20081229">
	<h3>BaseX 5.0 Released</h3>
	<div class="date">Fri, 19 Dec 2008</div>
	<p><a rel="details" href="http://basex.org/">BaseX 5.0</a>
	has been released.  New features include Full-Text support,
	improved XQuery conformance, XQJ (XQuery for Java) and
	XAPI (XML:DB) APIs, as well as GUI improvements for
	interactions and visualizations.</p></div>

      <div class="item" id="ni20081203">
	<h3>Qizx and Qizx/open 2.2 released</h3>
	<div class="date">Tue, 02 Dec 2008</div>
	<p><a rel="details" href="http://www.xmlmind.com/qizx/">Qizx</a>
	Free Engine and Qizx/open 2.2 released;
	Qizx is an embeddable, high-speed, native XML
	index-based XML Query engine written in the Java language.
	New features in 2.2 include support of the draft XQuery 1.1
	<i>group by</i> and <i>for . . . window</i> features, and
	a more liberal licensing scheme.  The source code is also
	now available for purchase.</p>
      </div>

      <div class="item" id="ni20081023">
	<h3>oXygen 10.0 released</h3>
	<div class="date">Thu, 23 Oct 2008</div>
	<p><a rel="details" href="http://www.oxygenxml.com/">oXygen XML Editor and Author version 10.0</a>
	has been released, and now includes the schema-aware XSLT 2.0 and XQuery processor from Saxonica, a new XML instance generator,
	tag completion based on schemas and XSLT stylesheets,
	integration of the Intel XML Software Suite, and more.
	Supports MarkLogic 4.0, Oracle 11g R1, SQL Server 2008, DB2 9.5,
	XHive 8, and Subversion 1.5.</p>
      </div>

      <div class="item" id="ni20081008">
	<h3>MarkLogic Server 4.0 Released</h3>
	<div class="date">Wed, 08 Oct 2008</div>
	<p><a href="http://www.marklogic.com/">MarkLogic</a> announced their
	<a href="http://developer.marklogic.com/pubs/4.0/">MarkLogic Server 4.0</a>,
	inlcuding full support for XQuery 1.0 as well as the draft
	Update and Full-Text specifications.
	New features include geospatial search, additional content analytics,
	alerting, and entity extraction.</p>
      </div>

      <div class="item" id="ni20080724">
	<h3>XQuery 1.1 First Public Working Draft</h3>
	<div class="date">Sat, 24 May 2008</div>
	<p>The <a href="http://www.w3.org/XML/Query/">W3C XML Query Working Group</a>
	has released a First Public Working Draft of
	<a rel="detals" href="http://www.w3.org/TR/xquery-11/">XQuery 1.1</a>.</p>
      </div>

	<!--* [older news]
      <div class="item" id="ni20080529b">
	<h3>XQuery Development Tools</h3>
	<div class="date">Thu, 29 May 2008</div>
	<p>An <a rel="details" href="http://www.xqdt.org/">Eclipse Plugin</a>
	for XQuery, currently limited to mxquery and Zorba.</p>
      </div>

      <div class="item" id="ni20080529a">
	<h3>FLWOR Foundation releases Zorba 0.9.2</h3>
	<div class="date">Thu, 29 May 2008</div>
	<p>The FLWOR Foundation has released
	<a rel="details" href="http://www.zorba-xquery.com/">Zorba</a>
	beta version 0.9.2,
	with XQuery modules, math functions,
	and also some experimental syntax from
	a possible XQuery 1.1 draft.</p>
      </div>

      <div class="item" id="ni20080524">
	<h3>Qizx/db 2.1 Released</h3>
	<div class="date">Fri, 23 May 2008</div>
	<p><a href="http://www.xmlmind.com/">XMLmind</a> has released
	<a rel="details" href="http://www.xmlmind.com/qizx/">Qizx/db 2.1</a>,
	an embeddable, high-speed, Java-based native XML database engine
	with XQuery support, including full-text and now Update;
	there is a commercial product and also a free engine, limited
	to "small" databases of under a gigabyte.</p>
      </div>

      <div class="item" id="ni20080328b">
	<h3>XQuery Scripting Extension 1.0 First Public Working Draft Published</h3>
	<div class="date">Fri, 28 Mar 2008</div>
	<p><a rel="details" href="http://www.w3.org/TR/2008/WD-xquery-sx-10-20080328/">XQuery Scripting Extension 1.0 First Public Working Draft Published</a> published as a
	first public working draft.
	The XQuery Scripting Extensions introduce some procedural
	exstensions to the (otherwise declarative and functional)
	XQuery language.</p>
      </div>

      <div class="item" id="ni20080328a">
	<h3>XQuery Scripting Extension 1.0 Use Cases Published</h3>
	<div class="date">Fri, 28 Mar 2008</div>
	<p><a rel="details" href="http://www.w3.org/TR/2008/WD-xquery-sx-10-use-cases-20080328/">XQuery Scripting Extension 1.0 Use Cases</a> published as a
	first public working draft.</p>
      </div>

      <div class="item" id="ni20080327">
	<h3>XML Query (XQuery) 1.1 Use Cases published</h3>
	<div class="date">Thu, 27 Mar 2008</div>
	<p><a rel="details" href="http://www.w3.org/TR/2008/WD-xquery-11-use-cases-20080327/">XML Query (XQuery) 1.1 Use Cases</a> published as a
	first working draft.</p>
      </div>

      <div class="item" id="ni20080314">
	<h3>XQuery Update Now A W3C Candidate Recommendation</h3>
	<div class="date">Fri, 14 Mar 2008</div>
	<p><a rel="details" href="http://www.w3.org/TR/2008/CR-xquery-update-10-20080314/">XQuery Update Facility 1.0</a> is now a
	W3C Candidate Recommendation; this means that the XML Query Working
	Group is asking for feedback, especially from implementers.</p>
      </div>

      <div class="item" id="ni20080201">
	<h3>GCX XQuery implementation listed</h3>
	<div class="date">Fri, 01 Feb 2008</div>
	<p><a rel="details" href="http://dbis.informatik.uni-freiburg.de/index.php?project=GCX">GCX</a>,
	a streaming in-memory open source XQuery engine with static and
	dynamic buffer minimzation, added to list of implementations</p>
      </div>

      <div class="item" id="ni20080115">
	<h3>Qizx/db 2.0 Released</h3>
	<div class="date">Tue, 15 Jan 2008</div>
	<p><a href="http://www.xmlmind.com/">XMLmind</a> has released
	<a rel="details" href="http://www.xmlmind.com/qizx/">Qizx/db 2.0</a>,
	an embeddable, high-speed, Java-based native XML database engine
	with XQuery support, including full-text.</p>
      </div>

      <div class="item" id="ni20080108b">
	<h3>BaseX 4.0 Released</h3>
	<div class="date">Tue, 08 Jan 2008</div>
	<p><a rel="details" href="http://basex.org/">BaseX 4.0</a>
	has been released.  New features include indexes,
	(partial) Full-Text support, GUI support for XML Updates,
	and more user interface items.</p>
      </div>

      <div class="item" id="ni20080102">
	<h3>DataDirect XQuery 3.1</h3>
	<div class="date">Wed, 02 Jan 2008</div>
	<p><a rel="details" href="http://www.xquery.com/products/whatsnew.html">DataDirect XQuery 3.1</a>
	has been released.  New features include
	performance enhancements,
	database support for database support for DB2 v9.1 for z/OS, MySQL Enterprise and
	Community servers, Oracle 11g, Informix, PostgreSQ,
	ODF support,
	EDI and flat file generation support,
	an Eclipse plugin, and more.</p>
      </div>

      <div class="item" id="ni20071107">
	<h3>XQuery Showcase: Examples</h3>
	<div class="date">Wed, 07 Nov 2007</div>
	<p>The list of
	<a rel="details" href="http://www.w3.org/XML/Query/#examples">example Web sites using XQuery</a>
	has been expanded.</p>
      </div>

      <div class="item" id="ni20071105">
	<h3>oXygen 9.0 released</h3>
	<div class="date">Mon, 05 Nov 2007</div>
	<p><a rel="details" href="http://www.oxygenxml.com">oXygen Editor 9.0</a>
	now includes an outline view for XQuery, improved
	support for using W3C XML Schema and XSL, drag-and-drop
	XML editing and many other features.</p>
      </div>

      <div class="item" id="ni20071017">
	<h3>W3C Java Applets updated</h3>
	<div class="date">Wed, 17 Oct 2007</div>
	<p><a rel="details" href="http://www.w3.org/2007/01/applets/">W3C Java Applets</a>
	updated for the January Recommendations, also for the latest Update and Full Text drafts.</p>
      </div>

      <div class="item" id="ni20071016">
	<h3>An XQuery Wikibook</h3>
	<div class="date">Tue, 16 Oct 2007</div>
	<p><a rel="details" href="http://en.wikibooks.org/wiki/XQuery">An XQuery Wikibook</a>
	by Chris Wallace, Dan Mcreary and Kurt Cagle</p>
      </div>

      <div class="item" id="ni20070831">
	<h3>XQilla 1.1.0 released</h3>
	<div class="date">Fri, 31 Aug 2007</div>
	<p><a rel="details" href="http://xqilla.sourceforge.net/HomePage">XQilla</a> version 1.1.0 released; this includes support for the
	Last Call Working Draft of XQuery Update.</p>
      </div>

      <div class="item" id="ni20070829">
	<h3>XQuery Update Facility Last Call for Comments</h3>
	<div class="date">Wed, 29 Aug 2007</div>
	<p>The <a href="http://www.w3.org/XML/Query/">XML Query Working Group</a>
	has published a
	<a rel="details" href="http://www.w3.org/TR/2007/WD-xquery-update-10-20070828/">Last Call Working Draft of the XQuery Update Facility 1.0</a>.
	Comments are welcome through 31 October.
	The corresponding
	<a href="http://www.w3.org/TR/2007/WD-xquery-update-10-requirements-20070828/">XQuery Update Facility 1.0 Requirements</a> and
	<a href="http://www.w3.org/TR/2007/WD-xquery-update-10-use-cases-20070828/">XQuery Update Facility 1.0 Use Cases</a> were also updated.</p>
      </div>

      <div class="item" id="ni20070809">
	<h3>Conference Talk about Choosing an XQuery Implementation</h3>
	<div class="date">Thu, 09 Aug 2007</div>
	<p><a rel="details" href="http://www.w3.org/2007/Talks/0808-quin-extreme-query/">Communicating Query</a>
	by
	<a href="http://www.holoweb.net/~liam/">Liam Quin</a>,
	with a paper at
	<a href="http://www.idealliance.org/papers/extreme/proceedings/html/2007/Quin01/EML2007Quin01.html">Extreme Markup</a>.</p>
      </div>

      <div class="item" id="ni20070711b">
	<h3>XQilla added</h3>
	<div class="date">Wed, 11 Jul 2007</div>
	<p><a rel="details" href="http://xqilla.sourceforge.net/HomePage">XQilla</a> added to the
	<a href="http://www.w3.org/XML/Query/#implementations">list of XQuery implementations</a>.</p>
      </div>

      <div class="item" id="ni20070711a">
	<h3>BaseX XQuery test results published</h3>
	<div class="date">Wed, 11 Jul 2007</div>
	<p><a rel="details" href="http://www.basex.org/">baseX</a>
	submitted
	<a href="http://www.w3.org/XML/Query/test-suite/XQTSReportSimple.html">test results</a> for their large-file implementation of XML Query.</p>
      </div>

      <div class="item" id="ni20070521">
	<h3>DataDirect XQuery 3.0 Released</h3>
	<div class="date">Mon, 21 May 2007</div>
	<p><a rel="details" href="http://www.datadirect.com/">DataDirect</a>
	DataDirect XQuery 3.0.  The new version includes support for
	the W3C XQuery Update draft, and also adds Web Services support.</p>
      </div>

      <div class="item" id="ni20070507">
	<h3>oXygen 8.2 supports XQuery</h3>
	<div class="date">Mon, 07 May 2007</div>
	<p><a rel="details" href="http://www.oxygenxml.com">oXygen Editor 8.2</a>
	includes an XQuery debugger for MarkLogic users, and has support for
	XQuery modules.  You can also edit, run, debug and profile both
	XSLT and XQuery using Saxon.  Multiple platforms supported.</p>
      </div>

      <div class="item" id="ni20070323b">
	<h3>XQuery Scripting Extension 1.0 Requirements</h3>
	<div class="date">Fri, 23 Mar 2007</div>
	<p><a rel="details" href="http://www.w3.org/TR/2007/WD-xquery-sx-10-requirements-20070323">XQuery Scripting Extension 1.0 Requirements</a>
	were published,
	a new work item for the XML Query Working Group, defining
	procedural extensions to XQuery.</p>
      </div>

      <div class="item" id="ni20070323a">
	<h3>XML Query (XQuery) 1.1 Requirements</h3>
	<div class="date">Fri, 23 Mar 2007</div>
	<p><a rel="details" href="http://www.w3.org/TR/2007/WD-xquery-11-requirements-20070323">XML Query (XQuery) 1.1 Requirements</a> were published
	as the XML Query Working Group begins a new phase of work.</p>
      </div>

      <div class="item" id="ni20070124">
	<h3>Ipedo</h3>
	<div class="date">Wed, 24 Jan 2007</div>
	<p><a rel="details" href="http://www.ipedo.com/html/news_releases/news_release_012407.html">Ipedo Launches Enhanced XQuery Views</a>,
	a new version of their XQuery implementation that brings
	them up right to date with the W3C Recommendation.</p>
      </div>
      [older] *-->


      <div class="item" id="ni20070123">
	<h3>W3C Recommendations!</h3>
	<div class="date">Tue, 23 Jan 2007</div>
	<p>W3C Recommendation Status for
	<a href="/TR/2007/REC-xquery-20070123/">XQuery 1.0: An XML Query Language</a>,
	<a href="/TR/2007/REC-xqueryx-20070123">XML Syntax for XQuery 1.0 (XQueryX)</a>
	and
	<a href="/TR/2007/REC-xpath20-20070123/">XML Path Language (XPath) 2.0</a>, as well as the supporting specifications,

	<a href="/TR/2007/REC-xpath-functions-20070123/" shape="rect">XQuery 1.0 and XPath 2.0 Functions and Operators</a>,
	<a href="/TR/2007/REC-xpath-datamodel-20070123/" shape="rect">XQuery 1.0 and XPath 2.0 Data Model (XDM)</a>,
	<a href="/TR/2007/REC-xslt-xquery-serialization-20070123/" shape="rect">XSLT 2.0 and XQuery 1.0 Serialization</a> and of course
	<a href="/TR/2007/REC-xquery-semantics-20070123/" shape="rect">XQuery 1.0 and XPath 2.0 Formal Semantics</a>.
	In addition,
	<a href="/TR/2007/REC-xslt20-20070123/">XSL Transformations (XSLT) Version 2.0</a> by the XSL Working Group is also a W3C Recommendation.
	</p></div>

	<div class="item" id="ni20061203">
	  <div class="date">Sun, 03 Dec 2006</div>
	  <h3>Micro XQuery Engine 0.1</h3>
	  <p><a rel="details" href="#mxquery">Micro XQuery Engine 0.1</a>
	  was released.</p></div>

	<div class="item" id="ni20061120">
	  <div class="date">Mon, 20 Nov 2006</div>
	  <h3>oXygen Editor 8.0</h3>
	  <p><a rel="details" href="http://www.oxygenxml.com/">oXygen editor 8.0</a>
	  includes debugging support for both XML Query and XSLT,
	  with support for Berkeley XML DB, IBM DB2 Pure XML,
	  eXist XML Database, MarkLogic, Microsoft SQLServer 2005,
	  Oracle 10g R2, RainingData TigerLogic XDMS, SoftwareAG Tamino
	  and XHive XML Database.</p></div>
      [older] *-->

    </div> <!--* end of news *-->

    <div class="content patents">
      <h2><a name="patents">Patent Disclosures</a></h2>
      <p>The XML Query Working Group operates under the Royalty Free
      terms of the W3C Patent policy.
      Patent disclosures relevant to the specifications produced by the XML Query
      working group can be found
      in the Implementation of the W3C Patent Policy (IPP)
      <a href="http://www.w3.org/2004/01/pp-impl/18797/status">XML Query IPP status page</a> and, for XSL and joint specifications the
      <a href="http://www.w3.org/2004/01/pp-impl/19552/status">XSL WG IPP status page</a>.
      Older disclosures are
      on the XML Query Working Group's patent disclosure
      page at <a href="http://www.w3.org/2002/08/xmlquery-IPR-statements">http://www.w3.org/2002/08/xmlquery-IPR-statements</a>.</p>
      <p>
      Specifications that are joint work with the XSL working group have also the
      additional patent disclosures provided by the XSL wg at <a href="http://www.w3.org/Style/XSL/Disclosures">http://www.w3.org/Style/XSL/Disclosures</a>.</p>

      <h2><a name="discussion">Discussion/Feedback:</a></h2>
      <ul>
	<li><em>Email</em>: use <a href="mailto:member-query-feedback&#64;w3.org">member-query-feedback&#64;w3.org</a> to comment/suggest new content for this page, or if for some reasons you need to directly contact the W3C XQuery responsibles; otherwise, please use the mailing lists listed below</li>
	<li><em>Mailing lists</em>:
	<dl>
	  <dt><a href="mailto:www-ql&#64;w3.org">www-ql&#64;w3.org</a></dt>
	  <dd>The public mailing list on query languages, including (but not
	  limited to) discussion on the XML Query project. This list
	  originated from the <a href="http://www.w3.org/TandS/QL/QL98/">QL'98</a> w3c-ql&#64;w3.org
	  mailing list, and has now become a public list (see the <a href="http://lists.w3.org/Archives/Public/www-ql/1999JulSep/0001.html">migration
	    announcement</a>). <em>Only subscribed users can post to this
	    list</em>. Subscription is open to everybody: to subscribe or
	  unsubscribe just send a message to <a href="mailto:www-ql-request&#64;w3.org">www-ql-request&#64;w3.org</a> with
	  your request. The list is publicly archived at <a href="http://lists.w3.org/Archives/Public/www-ql/">http://lists.w3.org/Archives/Public/www-ql/</a>.</dd>
	  <dt>&nbsp;</dt>
	  <dt><a href="mailto:public-qt-comments&#64;w3.org">public-qt-comments&#64;w3.org</a></dt>
	  <dd><p>Note: before posting to this mailing list, be sure
	  to read the <b>Status</b> section in the document on which you are
	  commenting.  Most of our documents now ask you to send
	  comments using bugzilla.</p>
	  <p>
	  This public mailing list is used to submit comments on the
	  publications of the XML Query and XSL working groups. <em>This is
	    not a discussion list (use <a href="mailto:www-ql&#64;w3.org">www-ql&#64;w3.org</a> instead)</em>, and so
	  <em>you shouldn't subscribe</em>: this list is just a way for
	  people to provide their comments to the XML Query and XSL WGs, and
	  for the WGs to reply. The list is publicly archived at <a href="http://lists.w3.org/Archives/Public/public-qt-comments/">http://lists.w3.org/Archives/Public/public-qt-comments/</a>.</p>
	  </dd>
	</dl>
	</li>
      </ul>

      <div class="topic forimplementers implementations">
      <h2><a name="products">Implementations</a></h2>
      <h3><a name="implementations">XML Query Implementations</a></h3>

      <!--* for the future
      <p>This page lists only implementations that sent us test results, or that are
      produced by participants in the Working Group; there is also a full list
      on the <a href="implementations">XQuery Implementations Page</a>.</p>
      **-->
      <p>If your implementation is not here, or if you know of an
      implementation that is not listed, send liam&#64;w3.org
      the details!</p>

      <p>Software that implements the <a name="xpath2fulltextimplementations">XQuery 1.0 and XPath 2 Full Text Facility</a> is so marked in this list.
      There is a separate list of
      <a href="#xpath2implementations">XPath 2</a> implementations.</p>

      <ol>
	<!--* 2011-09-15 w3c OK *-->
	<li>The W3C
	<a href="http://www.w3.org/2011/08/qt-applets/">XPath 2 and XQuery 1 Grammar Test Page</a>
	features Java applets that read expressions and show the resulting parse tree.</li>

	<!--* 2008-02-15: abacus dbxquery OK *-->
	<!--* 2011-03-25: abacus dbxquery ok but not active *-->
	<li>Abacus Systems'
	<a name="abacus" rel="nofollow" href="http://sourceforge.net/projects/dbxquery/">Relational XQuery</a>
	supports both relational data (via JDBC) and other sources
	including XML files, and
	also claims XQJ (XQuery for Java API) conformance.  Includes
	a GUI for creating and editing queries.  30 day evaluation.<br />
	[2011-03-25: Last update July 2009; project homepage is gone.</li>

	<!--* 2008-02-15: altova OK *-->
	<li>Altova GmbH <a rel="nofollow" href="http://www.altova.com/features_xslxpath.html">XMLSpy 2006</a>
	includes an XQuery Debugger, a code generator for mapping between
	Schemas, and <a rel="nofollow" href="http://www.altova.com/altovaxml.html">AltovaXML
	  Query Processor</a> which handles both XSLT 2 and XML Query 1.0
	[30-day free trial]
	</li>

	<!--* 2008-02-15: apple OK *-->
	<li>Apple's <a rel="nofollow" href="http://developer.apple.com/macosx/sherlock/">Sherlock</a>
	for Mac OS X; see also their
	<a rel="nofollow" href="http://developer.apple.com/documentation/AppleApplications/Conceptual/Sherlock/Concepts/ScriptExtensions.html#//apple_ref/doc/uid/20001085-160986-BAJFIAGE">XML Query Extension functions</a>.
	</li>

	<li>BEA's
	<!--* 2008-02-15: OK *-->
	<a href="http://www.oracle.com/bea/">Oracle Data Services Platform</a>
	[90-day free trial].
	<span class="kudos">BEA was an active participant in the XML Query Working Group;
	    the company was bought by Oracle, also an active participant.</span>
	</li>

	<!--* 2011-03-25: OK *-->
	<li>Berkeley Lab's
	<a name="p5" rel="nofollow" href="http://dsd.lbl.gov/nux/">Nux</a>, an open source
	Java in-memory toolkit for XML, XQuery, XPath, schema validation,
	fuzzy fulltext similarity search and related technologies
	using Saxon, XOM, Xerces and JAXB
	[open source under a BSD-style license].
	<span class="update">Implements the XQuery Update Facility</span>;
	<span class="fulltext">Full-Text Support</span>;
	latest release seems to be June 2006.</li>

	<!--* 2011-03-25: OK *-->
	<li>Bluestream Database Software Corp.'s <a rel="nofollow" href="http://www.bluestream.com/products/xstreamdb32">XStreamDB</a>,
	a native XML database server and full text support,
	aimed primarily at DITA.
	[commercial with trial download]
	</li>

	<!--* 2008-02-15: OK *-->
	<li id="xq2xml">David Carlisle's <a name="xq2xml" rel="nofollow" href="http://monet.nag.co.uk/xq2xml/">xq2xml</a>
	converts XQuery to XML, to XQueryX and to XSLT.
	</li>

	<!--* 2005-11-05: OK *-->
	<!--* 2007-02-01: FAIL (no reply) *-->
	<!--* 2008-02-15: FAIL (no reply) *-->
	<li>Cerebra Inc.'s
	Cerebra Server
	supports XQuery, OWL-DL and RDF, and can connect to external databases,
	but their Web server no longer responds.</li>

	<!--* 2009-09-15: OK *-->
	<li>Cognetic Systems's <a rel="nofollow" href="http://www.cogneticsystems.com/">XQuantum</a>
	implements XML Query 1.0 in an XML-native indexed data store.
	They have a Web page demonstrating the XQuery Use Cases, and
	support static typing and modules as well as some
	full-text extensions.
	[Windows and Linux; 30-day evaluation]
	<span class="fulltext">Full-Text Support</span>
	</li>

	<!--* 2008-02-15: OK *-->
	<li>DataDirect's <a name="pddxq" href="http://www.datadirect.com/products/xquery/">DataDirect XQuery (tm)</a>,
	an embeddable component for XQuery that implements the
	XQuery for Java(tm) API (XQJ)
	[Java; 15-day trial download].
	<span class="kudos">DataDirect participates in the XML Query Working Group.</span>
	</li>

	<!--* 2008-02-15: OK *-->
	<li>DataDirect's <a href="http://www.stylusstudio.com/">Stylus Studio 5.0</a> (XQuery, XML Schema and XSLT IDE).
	<span class="kudos">DataDirect participates in the XML Query Working Group.</span>
	</li>

	<!--* 2009-08-02 OK *-->
	<li>EMC's <a href="https://community.emc.com/community/edn">xDB</a>;
	this was formerly X-Hive, and EMC also owns Documentum.
	Their xDB product claims to be a native XML database in Java,
	with full XQuery support. [commercial, free evaluation download]</li>

	<!--* 2008-02-15: OK *-->
	<li><a rel="nofollow" href="http://exist.sourceforge.net/">eXist</a> has
	a Java-based native XML database with an XQuery interface.
	[Open source, GNU LGPL.]
	<span class="update">Implements the XQuery Update Facility</span>
	</li>

	<!--* 2008-02-15: OK *-->
	<li> The open source
	<a rel="nofollow" href="http://dbis.informatik.uni-freiburg.de/index.php?project=GCX/">GCX</a>,
	a streaming in-memory XQuery engine with static and
	dynamic buffer minimzation developed originally at Saarland University
	[open source]</li>

	<!--* 2008-02-15: OK *-->
	<li><a name="mxquery" href="http://www.mxquery.org/">MXQuery</a> from ETH,
	a research project; the <a href="http://sourceforge.net/projects/mxquery/">sourceforge page</a>
	says, The Micro XQuery Engine is a low-footprint, extensible
	implementation of XQuery 1.0 including extensions like the XQuery Update
	and XQueryP. It supports streaming execution and runs on all devices
	support CLDC 1.0 upwards.  [Open source, BSD/Apache license].
	<span class="kudos">ETH is an active participant in the XML Query Working Group.</span>
	<span class="update">Implements the XQuery Update Facility</span>
	</li>

	<!--* 2011-03-25: OK *-->
	<li>Fatdog Software's <a rel="nofollow" href="http://xqengine.sourceforge.net/">XQEngine</a>
	Java.
	[Open source: GPL or as negotiated].
	<span class="fulltext">Full-Text Support</span>
	[last update 2009-07-18]
	</li>

	<!--* 2008-02-15: OK *-->
	<li>GAEL's <a rel="nofollow" href="http://www.gael.fr/derby/">Derby</a>
	provides a Java API via their Data Request Broker.
	There is extensive support for data analysis, including
	plotting graphs and making tables.
	</li>

	<!--* 2008-02-15: OK *-->
	<li><a href="http://www.galaxquery.org/">Galax</a>.
	Open-source (in OCAML), with a <a href="http://www.galaxquery.com/galatex/">Galatex</a> full text search implementation.
	<span class="kudos">The authors of Galax include a number of
	  active participants in the XML Query Working Group, both
	  psat and present.</span>
	<span class="fulltext">Full-Text Support</span>
	</li>

	<!--* 2008-02-15: OK *-->
	<li>GNU's <a href="http://www.gnu.org/software/qexo/">Qexo (Kawa-Query)</a>
	by Per Bothner.
	Compiles XQuery on-the-fly to Java bytecodes.
	Based on and part of the
	<!--* 2008-02-15: OK *-->
	<a rel="nofollow" href="http://www.gnu.org/software/kawa/">Kawa</a> framework.
	Qexo implements
	the optional XQuery static typing feature.
	[Open-source under the GPL-like Kawa License].</li>

	<!--* 2009-10-21: OK *-->
	<li><a href="http://lambda.uta.edu/HXQ/">HXQ</a>,
	a compiler from XQuery to Haskell; appears to be an imcomplete
	research project, but said to be already useful. Open source,
	license terms unclear from the Web page.</li>

	<!--* 2008-02-15: OK *-->
	<li><a rel="nofollow" href="http://www.ipedo.com/">Ipedo</a>'s
	<!--* 2008-02-15: OK *-->
	<a rel="nofollow" href="http://www.ipedo.com/html/products.html">XIP</a>
	includes a "dual core" SQL + XML Query engine (XMLDB).</li>

	<li>IBM's <a href="http://www-01.ibm.com/software/webservers/appserv/was/featurepacks/xml/">WebSphere Application Server Feature Pack for XML</a>
	supports
	XPath 2.0, XSLT 2.0, and XQuery 1.0,
	with a Java API that unifies all three languages.
	[Free download; requires WebSphere Application Server, which
	is commercial]</li>

	<!--* 2008-02-15: OK *-->
	<li>IBM's <a href="http://www.alphaworks.ibm.com/tech/xqnsta">xqnsta</a>:
	XQuery Normalizer and Static Analyzer (XQNSTA) is a Java API and GUI
	for normalizing and computing the static type of XQuery expressions.
	<span class="kudos">IBM is an active participant in the XML Query Working Group.</span>
	</li>

	<!--* 2008-02-20: OK *-->
	<li>IBM's
	<a href="http://www.ibm.com/developerworks/db2/library/techarticle/dm-0602saracco/">DB2 9</a> stores XML in its native format and provides support
	for
	<a href="http://www.alphaworks.ibm.com/tech/xqexplorer">XQuery</a>.</li>

	<!--* 2005-11-05: OK *-->
	<!--* 2011-03-25: link broken? *-->
	<li>IPSI's <a href="http://www.ipsi.fraunhofer.de/oasys/projects/ipsi-xq/index_e.html">IPSI-XQ</a>
	[java; free download]; this seems to have moved to
	<a href="http://sourceforge.net/projects/ipsi-xq/">sourceforge</a>. Last update 2001-11-29.
	</li>

	<!--* 2005-11-05: OK *-->
	<li>Ispras Modis' <a href="http://www.modis.ispras.ru/Development/sedna.htm">Sedna</a>.
	Native XML DBMS in C/C++ and Scheme; partial support for XML Query.
	Includes an Apache HTTP module, and APIs for .NET, Python and
	Chicken Scheme.  There is also a Firefox extension,
	<a href="https://addons.mozilla.org/en-US/firefox/addon/5515">XqUSEme</a>,
	and a special build of firefox,
	<a href="https://addons.mozilla.org/en-US/firefox/addon/199900/">XDIB</a>
	(XQuery In a Browser), for unning client-side XQuery scripts.
	[Open source under the Apache License].</li>

	<!--* 2008-10-08: OK *-->
	<li>MarkLogic's <a href="http://developer.marklogic.com/download/">MarkLogic Server 4.0</a> (formerly known as Content Interaction Server).
	There is also a
	<a href="http://developer.marklogic.com/pubs/4.0/">technical overview document</a>.  Commercial, with free download restricted to 100 Megaybytes of data.  A limited duration trial license is also available, limited
	to 1G of content.
	<span class="fulltext">Full-Text Support</span>.
	<span class="update">Implements the XQuery Update Facility</span>.
	<span class="kudos">MarkLogic is an active participant in the XML Query Working Group.</span>
	</li>

	<!--* 2005-11-05: OK *-->
	<li>Microsoft's <a name="p4" href="http://www.microsoft.com/sql/express/">SQL Server 2005 Express</a>,
	with XML Schema, XPath 2, and XML Query support. Later versions of SQL Server continue to support
	XQuery.
	<span class="kudos">Microsoft is an active participant in the XML Query Working Group.</span>
	</li>

	<!--* 2011-03-25: OK *-->
	<li><a name="monetdbxquery">CWI</a>'s
	<a href="http://monetdb.cwi.nl/XQuery/">MonetDB/XQuery</a> is
	an XQuery system that also supports
	XQUF updates.
	It is based on the Pathfinder compiler developed at TU Munich,
	and aims at achieving high performance.
	Open Source (adapting the Mozilla Public License).
	<span class="update">Implements the XQuery Update Facility</span>.</li>

	<!--* 2005-11-05: OK *-->
	<li>OpenLink Software's <a href="http://demo.openlinksw.com:8890/xqdemo">Virtuoso Universal Server</a>
	claims to support XSLT 1.2 (?! their link points to the
	XSLT 1.1 draft), XQuery and SQLX.
	</li>

	<!--* 2007-08-17: OK *-->
	<li><a href="http://www.oracle.com/database/berkeley-db/xml/index.html">Oracle Berkeley DB XML 2.0</a>, formerly Sleepycat's,
	an embeddable native XML database with support
	for XQuery 1.0 (July 2004 draft), implemented in C++, with
	interfaces for Java, Python, Perl and PHP. Open source.
	<span class="kudos">Oracle is an active participant in the XML Query Working Group.</span>
	<span class="fulltext">Full-Text Support</span>
	</li>

	<!--* 2005-11-05: OK *-->
	<!--* 2007-12-22: OK *-->
	<li>Oracle's<a href="http://otn.oracle.com/tech/xml/xquery">Oracle XQuery</a>
	implementation
	is part of the Oracle Database product
	[multi-platform; seems to be a free binary download].
	<span class="kudos">Oracle is an active participant in the XML Query Working Group.</span>
	</li>

	<!--* 2007-06-21: OK *-->
	<li><a href="http://patternist.sourceforge.net/">Patternist</a>,
	an XQuery 1.0, XSL-T 2.0 and XPath 2.0 implementation that provices a C++ API
	(open source under GPL, uses TrollTech's Qt library)</li>

	<!--* 2005-11-05: OK *-->
	<li><a href="http://sourceforge.net/projects/phpxmlclasses/">PHP XML Classes</a>
	includes XqueryLite, a PHP implementation from 2002.
	[open source]</li>

	<!--* 2005-11-05: OK *-->
	<li>Politecnico di Milano's <a href="http://dbgroup.elet.polimi.it/xquery/">XQBE and other XQuery products</a></li>

	<!--* 2005-11-05: OK *-->
	<li>QuiLogic's <a href="http://www.quilogic.cc/">SQL/XML-IMDB</a>
	supports a mixure of SQL statements and XQuery expressions.
	[Free trial requires a restart every hour]
	</li>

	<!--* 2005-11-05: OK *-->
	<li>RainingData's <a href="http://www.rainingdata.com/products/tl/">TigerLogic XDMS
	  XML Data Management Server</a>
	for Sun Solaris and Microsoft Windows
	[free trial].</li>

	<!--* 2005-11-05: OK *-->
	<li>Renmin University of China's <a href="http://idke.ruc.edu.cn/OrientX/">OrientX</a>,
	a native XML database system in C/C++
	developed under Renmin University of China.
	[open source]
	</li>

	<!--* 2009-04-07: OK *-->
	<li>Saarland University Database Group's
	FluXQuery [no longer maintained], an extension of the XQuery language, FluX, that supports event-based query processing and the conscious handling of main memory buffers.
	Obsoleted by GCX, but the web page is still
	<a href="http://www.cs.cornell.edu/~koch/www.infosys.uni-sb.de/home/scherzin/FluXQuery.html">mirrored</a> at Cornell.</li>

	<li>Saxonica's <a href="http://saxonica.com/">Saxon</a> implements both
	XML Query and XSLT 2.0.
	Available in a schema-aware version as a commercial
	product, and without schema support as open source.
	<span class="kudos">Saxonica is an active participant in the XML Query Working Group.</span></li>

	<!--* 2005-11-05: OK *-->
	<li>Software AG's
	<ul>
	    <li><a href="http://www.tamino.com/">Tamino XML Server</a>
	<span class="fulltext">Full-Text Support</span>
	    </li>

	  <li><a href="http://tamino.demozone.softwareag.com/demoXQuery/index.html">Tamino XML Query Demo</a></li>
	</ul>
	</li>

	<!--* 2005-11-05: OK *-->
	<li>Sonic Software's
	<a href="http://www.sonicsoftware.com/products/sonic_xml_server">Sonic XML Server</a>
	[30-day trial]
	</li>

	<!--* 2010-01-10: OK *-->
	<li>The Universit&#228;t Konstanz's Database and Information
	Systems Group's
	<a href="http://www.basex.org/">BaseX</a> (open source/GPL)
	<span class="update">Implements the XQuery Update Facility</span>;
	<span class="fulltext">Full-Text Support</span></li>

	<!--* 2005-11-05: OK *-->
	<li>The University of Texas at Arlington Computer Science Department
	has people working on <a href="http://lambda.uta.edu/xqp/">XQP</a>:
	XQuery Processing on a P2P System.
	[Java; open source]</li>

	<!--* 2009-09-02 OK but no download *-->
	<li><a name="blixem">The Univerisity of Antwerp</a>'s
	<a href="http://adrem.ua.ac.be/wiki/Blixem">Blixem LiXQuery engine</a>
	implements a subset of XQuery intended for teaching
	(the download link no longer works, as of September 2009).</li>

	<!--* 2009-09-02: OK *-->
	<li>Worcester Polytechnic Institute's <a href="http://davis.wpi.edu/dsrg/PROJECTS/rainbow/">RainbowCore</a>.
	[Java.  available at no charge and without warranty].</li>


	<li><a href="http://code.google.com/p/xbird/">XBird</a>,
	a light-weight embeddable
	XQuery processor and database system written in Java,
	with a distributed XQuery processor.
	[open source]</li>


	<!--* 2010-06-11: OK *-->
	<li><a href="http://www.xmlmind.com/">XMLmind</a>'s
	<a href="http://www.xmlmind.com/qizx/">Qizx</a> comes
	in three versions: (1) an open source one (Qizx/open);
	(2) a commercial implementation, Qizx/db,
	with an indexed native XML database and full-text support,
	and (3) Qizx/db Free Engine, a freely downloadable version of Qizx/db
	but that has a database size limit of approximately
	one gigabyte of XML.
	<span class="update">Implements the XQuery Update Facility</span>;
	<span class="fulltext">Full-Text Support</span></li>

	<!--* 2005-11-05: OK *-->
	<li>Xpriori's <a href="http://www.xpriori.com/">NeoCore XMS</a>
	native XML database, with XPath2.0/XQuery access language support
	[.Net on Linux and MS Windows;
	free unlimited download for development purposes.]</li>

	<!--* 2005-11-05: OK *-->
	<li>XQuare Group and Universite' de Versailles Saint-Quentin's: <a href="http://forge.objectweb.org/project/showfiles.php?group_id=78">XQuare
	  Fusion and XQuare Bridge</a>,
	open-source, used to be called xQuark
	(see also the
	<!--* 2005-11-05: OK *-->
	<a href="http://xquare.objectweb.org/">Xquare home page</a>)</li>

	<!--* 2009-09-02 OK *-->
	<li><a href="http://www.xqib.org/">XQIB</a>, XQuery In the Browser,
	an XQuery plugin for Microsoft Internet Explorer
	[open source]</li>

	<!--* 2007-07-11: OK *-->
	<li><a href="http://xqilla.sourceforge.net/HomePage">XQilla</a>,
	C++ implementation based on pathan and Xerces-C.
	Open source (BSD/Sleepycat license).
	<span class="kudos">Sleepycat (Oracle) is an active participant in the XML Query Working Group.</span></li>

	<!--* 2009-09-15: OK *-->
	<li><a href="http://www.xqsharp.com/xqsharp/">XQSharp</a>,
	XQuery for the .NET framework, from
	<a href="http://www.cbcl.co.uk/cbcl/">CBCL</a>.
	Includes Schema support and static typing.
	XQSharp was previously known as Anglo.
	[commercial; free for non-commercial use]
	<span class="kudos">CBCL is an active participant in the XML Query Working Group.</span></li>

	<li>Xyleme's <a href="http://www.xyleme.com/lcms">Xyleme LCMS</a>
	[commercial]</li>

	<!--* 2008-08-25: OK *-->
	<li><a href="http://www.zorba-xquery.com/">Zorba</a>, an open
	source portable embeddable C++ implementation of XQuery.
	There are also Python
	and Ruby APIs. See also xqib. [open source, Apache licence]</li>

      </ol>

      <h3>Unconfirmed Implementations</h3>
      <p>Please send liam&#64;w3.org any information about these;
      I have tried to contact people where possible.</p>
      <ul>
	<!--* 2005-11-03: actuate OK *-->
	<li>Actuate's
	<a href="http://www.actuate.com/corporate/news/pressrelease.asp?ArticleId=6554">Actuate 8</a>
	incorporates Nimble's XQuery implementation.
	The Summary of New Features requires a registration (!) so
	I cannot be sure if this still implements XML Query.</li>

	<!--* 2009-08-02: Blackpearl OK *-->
	<li>ACL's <a name="p2" href="http://www.blackpearl.com/products/blackpearl_4.html">Blackpearl 4 platform</a>,
	supposedly with an embedded XQuery engine but this is not
	mentioned on their Web site as far as I can tell.
	The rights to Blackpearl were bought by <a href="http://www.acl.com/">ACL</a>,
	who also do not seem to talk about XML Query.
	</li>

	<!--* 2005-11-03: AGiLiENCE OK *-->
	<li>AGiLiENCE's <a href="http://www.xpeerion.com/">XPeerion</a>;
	AGiLiENCE is a spin-off from Siemens AG.  The Web page
	seems not to mention XML Query.</li>

	<!--* 2005-11-03: ats OK *-->
	<!--* 2008-02-01: ats fail *-->
	<!--* was: http://www.atssoft.com/products/bizquery.htm *-->
	<li>ATS' BizQuery [30-day free trial; no product link]</li>

	<!--* 2005-11-03: Axyana OK *-->
	<li>Axyana Software's <a href="http://www.axyana.com/qizxopen/">Qizx/Open</a>
	is now marketed by <a href="http://www.xmlmind.com/">XMLmind</a>;
	[Java, open source under the Mozilla Public License].
	<span class="fulltext">Full-Text Support</span></li>

	<!--* 2005-10-15: OK *-->
	<!--* 2008-02-01: not clear if it still includes XQuery:
	* http://svn.myrealbox.com/source/trunk/mcs/class/Mono.Xml.Ext/README
	*-->
	<li>The <a href="http://www.mono-project.com/Main_Page">Mono Project</a>
	implements a draft of XML Query, although this may
	not be active. [open source]</li>

	<!--* 2009-09-02 OK but no XQuery? *-->
	<li><a href="http://www.xenos.com/">Xenos</a> purchesed
	XML Global in 2003, and it is not clear from their
	Web page whether they still have XQuery support.</li>


	<!--* 2005-11-03: xquench OK *-->
	<li><a href="http://xquench.sourceforge.net/">XQuench</a> has
	not released any files since 2001 and is probably defunct.</li>
      </ul>


      <h3><a name="xpath2implementations">XPath 2 Implementations</a></h3>
      <p>Software that implements XPath 2.0, but not XML Query or XSLT 2</p>
      <ul>
	<li><a href="http://www.ditchnet.org/aquapath/">AquaPath</a>
	by Todd Ditchendorf
	is a free Cocoa-based developer tool for Mac OS X Tiger that allows
	you to evaluate XPath 2.0 expressions against any XML document and view
	the result sequence in a dynamic tree representation.</li>

	<!--* 2006-04-21: NSXML OK *-->
	<li>The <a href="http://www.mono-project.com/Main_Page">Mono Project</a>
	implements a draft of XPath 2.0 and XQuery. [open source]</li>

	<li><a href="http://developer.apple.com/documentation/Cocoa/Conceptual/NSXML_Concepts/index.html">NSXML</a> from Apple Computers
	includes support for XQuery 1.0 and XPath 2.0; it is part of Cocoa.</li>

	<!--* 2006-04-21: pathan OK *-->
	<li><a href="http://software.decisionsoft.com/pathanIntro.html">Pathan</a>
	from Decision Soft [open source, uses Xerces-C]</li>

	<li><a href="http://wiki.eclipse.org/PsychoPathXPathProcessor">PsychoPath</a> is an
	open source XML Schema Aware XPath 2.0 Processor written in Java
	under the EPL license, as part of the
	<a href="http://wiki.eclipse.org/XSLT_Project">Eclipse XSLT Project</a>.</li>

	<li><a href="http://www.saxonica.com/">Saxon</a> can also be used
	as a standalone XPath 2 engine, both on Java and .NET
	[open source]</li>

	<!--* 2005-11-05: OK *-->
	<li>Microsoft's <a name="p4" href="http://www.microsoft.com/sql/express/">SQL Server 2005 Express</a>,
	has XML Schema, XPath 2 and XML Query support. [commercial]</li>

	<!--* 2006-04-21: Virtual XML Garden OK *-->
	<li><a href="http://www.alphaworks.ibm.com/tech/virtualxml">Virtual XML Garden</a>
	from IBM has XPath 2.0 support and also supports some of XQuery.
	[commercial; source available]</li>

	<!--* 2006-04-21: altova OK *-->
	<li>Altova GmbH <a href="http://www.altova.com/features_xslxpath.html">XMLSpy</a>
	includes an XQuery Debugger, a code generator for mapping between
	Schemas, and <a href="http://www.altova.com/altovaxml.html">AltovaXML
	  Query Processor</a> which handles both XSLT 2 and XML Query 1.0
	[30-day free trial]
	</li>

	<!--* 2005-11-03: apple OK *-->
      </ul>

      <h3><a name="related">Related Products and Resources</a></h3>

      <p>The following is a (non-comprehensive) list of announcements of products
      that will include some support for XQuery, or that are of related nature:</p>
      <ul>
	<!--* 2008-07-07: OK *-->
	<li><a href="http://www.xqdt.org/">XQDT</a>, a plugin to
	add XQuery support to the Eclipse environment.</li>
	<li>The <a href="http://www.adrem.ua.ac.be/~wellenslepage/features.php">jEdit XQuery adapter plugin</a></li>
	<li>The <a href="http://jmvanel.free.fr/vim/">VIM Syntax coloring</a> for
	XQuery</li>
	<li>The <a href="http://www.xquery.com/bumblebee/">BumbleBee test
	  platform</a> for XQuery engines</li>
	<li>Java Specification Request for an <a href="http://www.jcp.org/en/jsr/detail?id=225">XQuery API for Java
	  (XQJ)</a></li>
	<li>A <a href="http://www.xqueryfunctions.com">set of reusable XQuery function examples</a>
	from Priscilla Walmsley that she plans to grow over time;
	includes descriptions of the built-in functions from her book (see below).      </li>
	<li>NIST's <a href="http://xw2k.sdct.itl.nist.gov/brady/xmlQuery.zip">XQuery Functions
	  and Operators test suite</a></li>
	<li>Sourceforge's JXQuery: <a href="http://sourceforge.net/projects/jxquery">http://sourceforge.net/projects/jxquery</a>.
	Open-source.</li>
	<li>Sourceforge's Kweelt: <a href="http://kweelt.sourceforge.net/">http://kweelt.sourceforge.net/</a>.
	Implementation of Quilt, an earlier query language. Open-source.</li>
      </ul>
    </div>


      <h2><a name="books">Publications</a></h2>

      <h3><a name="books">Books</a></h3>

      <p>I have tried to indicate where authors participated in
      the XML Query Working Group, sent comments on the specifications,
      or have written implementations themselves.  This does not
      necessarily make them good writers, but it may help you to
      understand their point of view and their connection with
      XML Query.</p>

      <p>Books that I have received more recently are at the top of the list.</p>

      <ul>
	<li><p><a href="http://en.wikibooks.org/wiki/XQuery">An XQuery Wikibook</a>
	by Chris Wallace, Dan Mcreary and Kurt Cagle</p></li>
	<li>
	<p><em><a href="http://books.elsevier.com/us/mk/us/subindex.asp?isbn=1558607110">Querying XML : XQuery, XPath, and SQL/XML in context</a></em>
	by Jim Melton and Stephen Buxton;
	The
	Morgan Kaufmann
	Series in Data Management Systems, 2006.
	The book also has its own
	<a href="http://xqzone.marklogic.com/queryingxmlbook/">Querying XML Web page</a>.
	[Both authors have participated heavily in the development
	of XML Query; Jim Melton is currently the co-chair of the
	W3C XML Query Working Group. - Liam]</p>
	</li>

	<li><p><i>XQuery: The XML Query Language</i>
	by Michael Brundage; Addison-Wesley Professional, February 2004.
	With a foreword by Michael Rys.
	Book web site at
	<a href="http://www.qbrundage.com/xquery/">www.qbrundage.com/xquery/</a>.
	[The first half of the book is an introduction to XQuery,
	including an interesting chapter on Idioms.  The second half
	is a reference. - Liam]</p></li>

	<li><p><i>XQuery from the Experts</i>
	edited by Howard Katz, with chapters by
	Don Chamberlin, Denise Draper, Mary Fernandez, Michael Kay, Jonathan Robie, Michael Rys, Jerome Simeon, Jim Tivy and Philip Wadler.
	Addison-Wesley Professional, September 2003.
	There are two chapters online at
	<a href="http://www.fatdog.com/">www.fatdog.com</a>.
	[Although this book is older, the text is a very
	happy mix of tutorials, design rationale and examples.
	The authors have been heavily involved in the
	design of XML Query, and most have been active memebers
	of the W3C XML Query Working Group; the editor, Howard Katz,
	has also made his own open-source implementation. - Liam]</p></li>
      </ul>

      <p>I have not seen the following books:</p>
      <ul>

	<li><i>XQuery</i> by Priscilla Walmsley.
	O'Reilly; expected late 2006. The first half is available through their "Rough Cuts" program (at
	<a href="http://www.oreilly.com/catalog/xquery/">http://www.oreilly.com/catalog/xquery/</a>) and at
	Priscilla's information page at <a href="http://www.datypic.com/books/xquery">http://www.datypic.com/books/xquery</a>.
	[I have not seen this book. Priscilla made many helpful comments on the specifications - Liam]</li>

	<li><p><i>XQuery Kick Start</i> by James McGovern, Per Bothner,
	Kurt Cagle, James Linn and Vaidyanathan Nagarajan; Sams, September 2003.
	[I have not seen this book.  Per Bothner made many helpful
	public comments on the specifications - Liam]</p></li>

	<li><p><i>Early Adopter XQuery</i>
	by Dan Maharry, Rogerio Saran, Kurt Cagle, Mark Fussell and
	Nalleli Lopez.
	Wrox Press; January, 2002.
	[This book was probably too early to be of use today, although
	I have not seen it to be sure.  I am listing it for
	completeness.  Michael Brundage has written that it is out of date, but
	that it reviewed some XQuery APIs - Liam]</p></li>

	<li><p><i>Querying XML with XQuery (Advances in Database Systems)</i>
	by Yannis Papakonstantinou and Ioana Manolescu.
	Springer; March 2006
	[forthcoming, I assume.
	Ioana participates in the XML Query Working Group. - Liam]</p></li>

	<li><p><i>XQuery - Grundlagen und fortgeschrittene Methoden</i>
	by Wolfgang Lehner.  dpunkt.verlag, January 2004; this book
	is downloadable from Amazon for US$30.</p></li>
      </ul>

      <h3><a name="tutorials">Tutorials</a></h3>

      <p>A Google search for
      <a href="http://www.google.com/search?hl=en&#38;q=%28%22XQuery+tutorial%22%7C%22XML+Query+tutorial%22%29">"(XQuery tutorial"|"XML Query tutorial")</a>
      produced over 150 matches (Google actually said <i>about 30,500</i>
      but this turned out to mean <i>exactly 153</i>).
      </p>


      <h2><a name="other">Other Pointers</a></h2>

      <p>To suggest a new pointer,
      send an email to member-query-feedback&#64;w3.org.</p>

      <ul>
	<li><a href="http://www.research.ibm.com/journal/sj45-2.html">IBM Systems Journal Vol 45, No. 2, 2006 - Celebrating 10 Years of XML</a> has a number of articles on
	or relating to XML Query.</li>
	<li><a href="http://www.w3.org/2006/Talks/0525-www2006-Kay.pdf">Choosing Between XSLT 2.0 and XML Query 1.0</a> by Mike Kay (Saxonica),
	a talk given
	at the WWW 2006 conference in May 2006.</li>
	<li><a href="http://www.w3.org/2006/Talks/FlorescuWWW06.pdf">An
	  XML based architecture for Web 2.0 applications</a>
	by Daniela Florescu (Oracle Corp.),
	a talk given
	at the WWW 2006 conference in May 2006.</li>
	<li><a href="http://jonathanbruceconnects.com/jonathan_bruce">Jonathan Bruce's blog</a> covering XQuery topics from the perspective
	of .NET and Java developers, including some XQJ coverage. </li>
	<li><a href="http://blogs.datadirect.com/jonathan_robie/">Jonathan Robie's XQuery Blog</a></li>
	<li>Oxygen XML's &lt;oXygen/&gt; editor includes an <a href="http://www.oxygenxml.com/xquery_debugger.html">XQuery debugger</a>
	that relies on Saxon.  The editor is in Java and
	runs on Linux and Unix as well as on Microsoft Windows and Mac OS X.
	</li>
	<li><a name="acmupdate20051220" id="acmupdate20051220">A brief article,</a>
	<a href="http://www.sigmod.org/sigmod/record/issues/0512/p78-column-eisenberg-melton.pdf">XQuery 1.0 is Nearing Completion</a> by
	Andrew Eisenberg and Jim Melton,
	ACM SIGMOD Record, Vol. 34, No. 4, December 2005.</li>
	<li><a href="http://www.stylusstudio.com/xquery_flwor.html">Blooming FLWOR - An Introduction to the XQuery FLWOR Expression</a>, a tutorial
	by Dr. Michael Kay, the sequel to
	<i>Learn XQuery in 10 Minutes</i> (see next item).</li>
	<li><a name="sskay" href="http://www.stylusstudio.com/xquery_primer.html">Learn XQuery In 10 Minutes</a> by <a href="http://www.saxonica.com/">Dr. Michael H. Kay</a></li>
	<li><a href="http://www.datypic.com/services/xquery/intro.html">Introduction to XQuery</a>,
	a tutorial by Priscilla Walmsley (updated to align with June 2006 CR documents)</li>
	<li><a name="p7" href="http://www.yukonxml.com/articles/xquery/">Essential XQuery - The XML Query Language</a>, tutorial, 2004.</li>
	<li><a name="p6" href="http://www.adrem.ua.ac.be/~adrem/biborb/bibs/ADReM/papers/hidders02xqueryintro.pdf">A Light but Formal Introduction to XQuery</a>, research/educational article, Dec 2004.</li>
	<li><a name="p1" href="http://www.pietsieg.com/sections/XQuery/ArtXQueryBeg.aspx">Using XQuery in ASP.NET</a> article/tutorial by Pieter Siegers, Aug 2004.</li>
	<li><a href="http://www.amazon.com/exec/obidos/ASIN/0764569104/">XPath 2.0 Programmer's Reference</a> book by Wrox, Aug 2004.</li>
	<li><a href="http://www.qbrundage.com/xquery/">XQuery: The XML Query
	  Language</a>, book by Addison-Wesley, Feb 2004</li>
	<li><a href="http://www.topxml.com/xquery/default.asp">Learn XQuery and
	  ASP.NET Tutorial</a>, Jan 2004.</li>
	<li><a href="http://www.xml.com/pub/a/2003/10/01/xquery.html">XQuery
	  Implementation</a>, Oct 2003.</li>
	<li><a href="http://www.datadirect.com/news/whatsnew/xquerybook/index.ssp">XQuery: A
	  Guided Tour</a>, Sep 2003.</li>
	<li><a href="http://www.awprofessional.com/catalog/product.asp?product_id=%7BC4E463B7-6CD6-4EA1-A920-3617A2B453A1%7D">XQuery
	  from the Experts: A Guide to the W3C XML Query Language</a>, book by
	Addison-Wesley, Sep 2003.</li>
	<li><a href="http://www.softwareag.com/xml/tools/xquery_primer.pdf">XQuery
	  1.0: Primer</a>, Jul 2003.</li>
	<li><a href="http://www.devx.com/codemag/Article/16124/0/page/1">XQuery,
	  the Query Language of the Future</a>, Jul 2003.</li>
	<li><a href="http://www.xml.com/pub/a/2003/06/11/qexo.html">Writing and
	  Debugging XQuery Web Apps with Qexo</a>, Jun 2003.</li>
	<li><a href="http://www.xml.com/pub/a/2003/05/14/xquery.html">Interactive
	  Web Applications with XQuery</a>, May 2003.</li>
	<li><a href="http://otn.oracle.com/oramag/oracle/03-may/o33devxml.html">X
	  Is for XQuery</a>, May 2003.</li>
	<li><a href="http://www.devx.com/xml/Article/15618/">Five Practical XQuery
	  Applications</a>, May 2003.</li>
	<li><a href="http://www.xml.com/pub/a/2003/04/09/xquery.html">Processing
	  RSS</a>, April 2003.</li>
	<li><a href="http://www.amazon.com/exec/obidos/ASIN/0672324792/ref%3Dcm%5Fcustrec%5Fgl%5Frec/104-218595/002-8755837-4740844">XQuery
	  Kick Start</a>, book by Sams (2003).</li>
	<li><a href="http://www.acm.org/sigmod/record/issues/0212/AndrewEJimM.pdf">An
	  Early Look at XQuery</a>, SIGMOD record, vol.31, n.4, 2002.</li>
	<li><a href="http://www.research.ibm.com/journal/sj/414/chamberlin.pdf">XQuery:
	  An XML query language</a>, tutorial overview, IBM Systems Journal 41(4),
	2002.</li>
	<li><a href="http://www.amazon.com/exec/obidos/tg/detail/-/1861006950/104-2185952-034/002-8755837-4740844">Early
	  Adopter XQuery</a>, book by Wrox (2002).</li>
	<li><a href="http://www.xml.com/pub/a/2002/12/19/datamodel.html">A Data
	  Model for Strongly Typed XML</a>, December 2002.</li>
	<li><a href="http://www-105.ibm.com/developerworks/education.nsf/xml-onlinecourse-bytitle/874EFD6F6BAB2A1F86256C37004CC797?OpenDocument">Process
	  XML using XML Query</a>, tutorial, 2002.</li>
	<li><a href="http://www.gnu.org/software/qexo/XQuery-Intro.html">What is
	  Xquery?</a>, introductory article, 2002.</li>
	<li><a href="http://www.w3.org/2002/Talks/www2002-xpath-xquery/">Presentation on
	  XPath and XQuery</a> held at the 11<sup>th</sup> International World Wide
      Web Conference<!--* (<a href="http://www2002.org">WWW2002</a>)*-->, Hawaii, May,
	2002.</li>
	<li><a href="http://www.xml.com/pub/a/2002/03/20/xpath2.html">What's new in
	  XPath 2.0</a>, introductory article, March, 2002.</li>
	<li><a href="http://www.w3.org/2002/01/xquery-unicode.pdf">Presentation on
	  XML Query</a> held at the 20<sup>th</sup> Unicode Conference, Washington,
	January, 2002.</li>
	<li><a href="http://www.acm.org/sigmod/record/issues/0109/SPECIAL/fankhauser2.pdf">XQuery
	  Formal Semantics State and Challenges</a>, SIGMOD record, vol.30, n.3,
	2001.</li>
	<li><a href="http://www.w3.org/Talks/2001/04/www10-query/">Presentation on
	  XML Query</a> held at the 10<sup>th</sup> International World Wide Web
	Conference (<a href="http://www10.org">WWW10</a>), Hong Kong, May,
	2001.</li>
	<li><a href="http://www.w3.org/2000/Talks/www9-xmlquery/">Presentation on
	  XML Query</a> held at the 9<sup>th</sup> International World Wide Web
	Conference (<a href="http://www9.org">WWW9</a>), Amsterdam, May 19,
	2000.</li>
	<li>Where it all started: the <a href="http://www.w3.org/TandS/QL/QL98/"><strong>Query Languages'98
	    (QL'98)</strong></a> workshop, with its unique collection of contributed
	works.</li>
	<li>The <a href="../Activity.html">XML Activity Statement</a> also explains
	the W3C's work on query language, </li>
	<li>The XML Query <a href="http://www.w3.org/XML/2009/02/query-charter.html">charter</a>.</li>
	<li>The <a href="/XML/Group/Query">XML Query Working Group page (W3C
	  members only)</a></li>
      </ul>

      <div class="topic">
	<h3><a name="contact">Contacting Us</a></h3>
	<p>To contact the XML Query and XSL Working Groups,
	you can send email to public-qt-comments at w3.org</p>
	<p>To report errors
	in the specification please use bugzilla, as described in the
	Status section at the start of each specification.</p>
	<p>To comment on this page, send mail to
	<a href="http://www.holoweb.net/~liam/">liam at w3 dot org</a></p>
      </div>

      <hr />
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	</a>
	<small>First created by Massimo Marchiori on April 2000.<br />
	    Page redesigned in 2007 by
	    <a href="http://www.holoweb.net/~liam/">Liam</a>;
	    images from
	    <a href="http://www.fromoldbooks.org/">www.fromoldbooks.org</a>
	    used by permission.<br />
	  Page maintained by
	  <a href="http://www.w3.org/People/Quin/">Liam Quin</a>.<br />
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      </address>

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