index.html 28.3 KB

Raw Blame History Permalink

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>SPARQL Query Results XML Format</title>
<style type="text/css">
/*<![CDATA[*/
span.cvs-id     {color: gray; font-size:80%}

.toc {
    text-indent: 0;
}
DIV.toc UL UL, DIV.toc OL OL {margin-left: 0}
DIV.toc UL UL UL, DIV.toc OL OL OL {margin-left: 1em}
DIV.toc UL UL UL UL, DIV.toc OL OL OL OL {margin-left: 0}
LI.tocline1 {font-weight: bold}
LI.tocline2 {font-weight: normal}
LI.tocline4 {font-style: italic}
/* DIV.subtoc UL, DIV.subtoc OL {list-style: none} */
/* The border in the following rule crashes NN4 on fonts.html :-(
DIV.subtoc {padding: 1em; border: solid black thin; margin: 1em 0;
    background: #ddd}
*/
DIV.toc, UL.index, DT {
    text-align: left
}

PRE.xmlresult {
  margin: 1em 4em 1em 4em;
  color: black;
  background-color: #eee;
  padding: 0.5em;
  border-color: #006;
  border-width: 1px;
  border-style: dotted;
}

DIV.mime {
  margin: 1em 4em 1em 4em;
  color: black;
  background-color: white;
  padding: 0.5em;
  border-color: black;
  border-width: 1px;
  border-style: solid;
}

.defn		{ /*border: double 1px #888888; *//* Buggy */
                  border: 2px solid #888888;
                  padding: 1ex 2ex 0.5ex 2ex ; /* top, right, bottom, left */
                  margin: 1em 6em 1em 2em ;
                  page-break-inside: avoid ;
                  background-color: #F0F8F8 ; }
div.defn p	{ margin-top: 1ex ; margin-bottom: 1.5ex ;}
div.defn ul	{ margin-top: 1ex ; margin-bottom: 1.5ex ;}
span.definedTerm	{font-weight: bold;}

.issue          { color: #ff3f3f }
ul.issue        {}
.note           { margin-left: 2.5em; margin-right: 4ex ; font-size: 85% ; font-style: italic ; }

/*]]>*/
</style>
<link rel="stylesheet" type="text/css" href="http://www.w3.org/StyleSheets/TR/W3C-REC" />
</head>
<body>

  <div class="head">
    <p><a href="http://www.w3.org/"><img src=
    "http://www.w3.org/Icons/w3c_home" alt="W3C" height="48" width=
    "72" /></a></p>

    <h1 id="main">SPARQL Query Results XML Format</h1>

    <h2><a name="w3c-doctype" id="w3c-doctype">W3C Recommendation 15 January 2008</a></h2>

    <dl>
      <dt>This version:</dt>
        <dd><a href="http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115/">http://www.w3.org/TR/2008/REC-rdf-sparql-XMLres-20080115/</a></dd>
      <dt>Latest version:</dt>
        <dd><a href="http://www.w3.org/TR/rdf-sparql-XMLres/">http://www.w3.org/TR/rdf-sparql-XMLres/</a></dd>
      <dt>Previous version:</dt>
        <dd><a href="http://www.w3.org/TR/2007/PR-rdf-sparql-XMLres-20071112/">http://www.w3.org/TR/2007/PR-rdf-sparql-XMLres-20071112/</a></dd>

      <dt>Editors:</dt>
	<dd><a href="http://purl.org/net/dajobe/">Dave Beckett</a>, <a href="http://www.ilrt.bris.ac.uk/">Institute for Learning and Research Technology (ILRT)</a>, <a href="http://www.bristol.ac.uk/">University of Bristol</a></dd>
	<dd><a href="http://wwwis.win.tue.nl/~jbroekst/">Jeen Broekstra</a>, <a href="http://wwwis.win.tue.nl/">Information Systems Group</a>, <a href="http://www.tue.nl/">Eindhoven University of Technology</a></dd>
    </dl>

<p>Please refer to the <a href="http://www.w3.org/2001/sw/DataAccess/XMLres-errata"><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=sparql-XMLres"><strong>translations</strong></a>.</p>

<p class="copyright"><a href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">  Copyright</a> &#xa9;2007 <a href="http://www.w3.org/"><acronym title="World Wide Web Consortium">W3C</acronym></a><sup>&#xae;</sup>  (<a href="http://www.csail.mit.edu/"><acronym title="Massachusetts Institute of Technology">MIT</acronym></a>, <a href="http://www.ercim.org/"><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 title="Separator for header" />

  <div>
    <h2 class="notoc"><a id="abstract" name="abstract">Abstract</a></h2>

    <p>RDF is a flexible, extensible way to represent information
    about World Wide Web resources. It is used to represent, among
    other things, personal information, social networks, metadata
    about digital artifacts like music and images, as well as
    provide a means of integration over disparate sources of
    information.  A standardized query language for RDF data with
    multiple implementations offers developers and end users a way
    to write and to consume the results of queries across this wide
    range of information.</p>

    <p>This document describes an XML format for the variable binding
    and boolean results formats provided by the
    <acronym title="Simple Protocol And RDF Query Language">SPARQL</acronym>
    query language for RDF, developed by the
    <a href="http://www.w3.org/2001/sw/DataAccess/">W3C RDF Data Access
    Working Group</a> (DAWG), part of the
    <a href="http://www.w3.org/2001/sw/">Semantic Web Activity</a>
    as described in the
    <a href="http://www.w3.org/2001/sw/Activity">activity statement</a> .</p>

  </div>

<div>
<h2 id="status">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 a <a href="http://www.w3.org/2005/10/Process-20051014/tr.html#RecsW3C">W3C Recommendation</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>Comments on this document should be sent to <a href="mailto:public-rdf-dawg-comments@w3.org">public-rdf-dawg-comments@w3.org</a>, a mailing list with a <a href="http://lists.w3.org/Archives/Public/public-rdf-dawg-comments">public archive</a>. Questions and comments about SPARQL that are not related to this specification, including extensions and features, can be discussed on the mailing list <a href="mailto:public-sparql-dev@w3.org">public-sparql-dev@w3.org</a>, (<a href="http://lists.w3.org/Archives/Public/public-sparql-dev">public archive</a>).</p>

<p>This document was produced by the <a href="http://www.w3.org/2001/sw/DataAccess/">RDF Data Access Working Group</a>, which is part of the <a href="http://www.w3.org/2001/sw/Activity">W3C Semantic Web Activity</a>. The first release of this document as a Working Draft was
21 Dec 2004
 and the Working Group has
addressed a number of <a href="http://lists.w3.org/Archives/Public/public-rdf-dawg-comments/">comments received</a> and <a href="http://www.w3.org/2001/sw/DataAccess/issues">issues</a> since then. The media type <code>application/sparql-results+xml</code> has been approved since the publication of the <a href="http://www.w3.org/TR/2007/PR-rdf-sparql-XMLres-20071112/">November 2007 Proposed Recommendation</a>.</p>

<p id="implExp">The Working Group's
<a href="http://www.w3.org/2001/sw/DataAccess/impl-report-xml">SPARQL Query Results XML Format Implementation Report</a>
 demonstrates that the goals for interoperable
implementations, set in the
<a href="http://www.w3.org/TR/2007/CR-rdf-sparql-XMLres-20070925">September 2007 Candidate Recommendation</a>
, were achieved.</p>

<p><span class="postponed">The Data Access Working Group has postponed 12 issues, including <a href="http://www.w3.org/2001/sw/DataAccess/issues#countAggregate">aggregate functions</a>, and <a href="http://www.w3.org/2001/sw/DataAccess/issues#update">an update language</a>.</span></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 rel="disclosure" href="http://www.w3.org/2004/01/pp-impl/35463/status">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>
  <hr />

  <div class="toc">
    <h2><a id="contents" name="contents">Table of Contents</a></h2>

    <ul class="toc">
      <li class="tocline1">
        <a href="#introduction" class="tocxref">1. Introduction</a>
      </li>
      <li class="tocline1">
        <a href="#definition" class="tocxref">2. Definition</a>
      </li>
      <li class="tocline2">
        <a href="#docElement" class="tocxref">2.1. Document Element</a>
      </li>
      <li class="tocline2">
        <a href="#head" class="tocxref">2.2. Header</a>
      </li>
      <li class="tocline2">
        <a href="#results" class="tocxref">2.3. Results</a>
      </li>
      <li class="tocline1">
        <a href="#examples" class="tocxref">3. Examples</a>
      </li>
      <li class="tocline1">
        <a href="#schemas" class="tocxref">4. XML Schemas</a>
      </li>
      <li class="tocline1">
        <a href="#mime" class="tocxref">5. Internet Media Type, File Extension and Macintosh File Type</a>
      </li>
      <li class="tocline1">
        <a href="#references" class="tocxref">6. References</a>
      </li>
    </ul>
  </div>

  <h2>1. <a id="introduction" name="introduction">Introduction</a></h2>

<p>The
<cite><a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/">SPARQL Query Language for RDF</a></cite>
<a href="#ref-sparql-query">[SPARQL-QUERY]</a>
defines several <em>Query Result Forms</em>
(<a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/#QueryForms">SPARQL Query section 10</a>).
This document defines a <a href="#defn-srd">SPARQL Results Document</a>
that encodes
the variable binding query results from <code>SELECT</code> queries
(<a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/#select">SPARQL Query section 10.2</a>)
and boolean query results from <code>ASK</code> queries
(<a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/#ask">SPARQL Query section 10.5</a>)
in
<cite><a href="http://www.w3.org/TR/2004/REC-xml-20040204/">XML</a></cite>
<a href="#ref-xml">[XML]</a>.
</p>


  <h2><a id="definition" name="definition">2. Definition</a></h2>

  <div class="defn">
    <p>
      <b>Definition:</b>
      <a name="defn-srd">SPARQL Results Document</a>
    </p>
    <p>A <span class="definedTerm">SPARQL Results Document</span> is an
    XML document that is valid with respect to either the
    RELAX NG XML Schema or the W3C XML Schema in
    <a href="#schemas">Section 4.</a>
   </p>
  </div>


  <h3><a id="docElement" name="docElement">2.1. Document Element</a></h3>

<p>The <a href="#defn-srd">SPARQL Results Document</a>
begins with <code>sparql</code> document element in the
<code>http://www.w3.org/2005/sparql-results#</code> namespace,
written as follows:</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"&gt;
 ...
&lt;/sparql&gt;
</pre>

<p>Inside the <code>sparql</code> element are two sub-elements,
<code>head</code> and
a results element (either <code>results</code> or <code>boolean</code>)
which must appear in that order.
</p>


<h3><a id="head" name="head">2.2. Header</a></h3>

<p>The <code>head</code> element is the first child element of
the <code>sparql</code> element.</p>

<p>For a variable binding query result, <code>head</code> must contain a
sequence of elements describing the set of
<a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/#defn_QueryVariable">Query Variable</a>
names in the
<a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/#defn_sparqlSolutionSequence">Solution Sequence</a>
(here called query results).</p>

<p>The order of the variable names in the sequence is the order of
the variable names given to the argument of the <code>SELECT</code>
statement in the SPARQL query.  If <code>SELECT *</code> is used, the
order of the names is undefined.</p>

<p>Inside the <code>head</code> element, the ordered sequence of
variable names chosen are used to create empty child elements
<code>variable</code> with the variable name as the value of an
attribute <code>name</code> giving a document like this:</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"&gt;

  &lt;head&gt;
    &lt;variable name="x"/&gt;
    &lt;variable name="hpage"/&gt;
    &lt;variable name="name"/&gt;
    &lt;variable name="mbox"/&gt;
    &lt;variable name="blurb"/&gt;
  &lt;/head&gt;
...
&lt;/sparql&gt;
</pre>

<p>For a boolean query result, no elements are required inside
<code>head</code> and <code>variable</code> must not be present.</p>


<p>For any query result, <code>head</code> may also contain
<code>link</code> child elements with an <code>href</code> attribute
containing a relative URI that provides a link to some additional
metadata about the query results.  The relative URI is resolved
against the in-scope base URI which is usually the query results
format document URI.  <code>link</code> elements must appear after
any <code>variable</code> elements that are present.</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"&gt;

  &lt;head&gt;
    ...
    &lt;link href="metadata.rdf"/&gt;
  &lt;/head&gt;
...
&lt;/sparql&gt;
</pre>


<h3><a id="results" name="results">2.3. Results</a></h3>

<p>The second child-element of <code>sparql</code>
must appear after <code>head</code> and is either
<code>results</code> or <code>boolean</code>.
It is written even if the query results are empty.</p>

<h3><a id="vb-results" name="vb-results">2.3.1. Variable Binding Results</a></h3>

<p>The <code>results</code> element contains the complete sequence of
query results.</p>

<p>For each
<a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/#defn_sparqlSolutionMapping">Query Solution</a>
in the query results, a <code>result</code>
child-element of <code>results</code> is added giving
a document like:</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"&gt;
  ...  head ...

  &lt;results&gt;
    &lt;result&gt;...
    &lt;/result&gt;
    &lt;result&gt;...
    &lt;/result&gt;
    ...
  &lt;/results&gt;

&lt;/sparql&gt;
</pre>

<p>Each <code>result</code> element corresponds to one <em>Query
Solution</em> in a result and contains child elements (in no particular order) for each <em>Query
Variable</em> that appears in the solution. It
is used to record how the query variables bind to <a
href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/#defn_RDFTerm">RDF
Term</a>s.
</p>

<p>Each binding inside a solution is written as an element
<code>binding</code> as a child of <code>result</code> with the query
variable name as the value of the <code>name</code> attribute.  So for a
result binding two variables <em>x</em> and <em>hpage</em> it would
look like:</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"&gt;
  &lt;head&gt;
    &lt;variable name="x"/&gt;
    &lt;variable name="hpage"/&gt;
  &lt;/head&gt;

  &lt;results&gt;
    &lt;result&gt;
      &lt;binding name="x"&gt; ... &lt;/binding&gt;
      &lt;binding name="hpage"&gt; ... &lt;/binding&gt;
    &lt;/result&gt;

    &lt;result&gt;
      &lt;binding name="x"&gt; ... &lt;/binding&gt;
      &lt;binding name="hpage"&gt; ... &lt;/binding&gt;
    &lt;/result&gt;
    ...
  &lt;/results&gt;

&lt;/sparql&gt;
</pre>

<p>The value of a query variable binding, which is an <em>RDF Term</em>, is
included as the content of the <code>binding</code> as follows:</p>

<dl>
<dt>RDF URI Reference <em>U</em><br /></dt>
<dd><code>&lt;binding&gt;&lt;uri&gt;</code><em>U</em><code>&lt;/uri&gt;&lt;/binding&gt;</code></dd>

<dt>RDF Literal <em>S</em><br /></dt>
<dd><code>&lt;binding&gt;&lt;literal&gt;</code><em>S</em><code>&lt;/literal&gt;&lt;/binding&gt;</code></dd>

<dt>RDF Literal <em>S</em> with language <em>L</em><br /></dt>
<dd><code>&lt;binding&gt;&lt;literal
xml:lang="</code><em>L</em><code>"&gt;</code><em>S</em><code>&lt;/literal&gt;&lt;/binding&gt;</code></dd>

<dt>RDF Typed Literal <em>S</em> with datatype URI <em>D</em><br /></dt>
<dd><code>&lt;binding&gt;&lt;literal
datatype="</code><em>D</em><code>"&gt;</code><em>S</em><code>&lt;/literal&gt;&lt;/binding&gt;</code></dd>

<dt>Blank Node label <em>I</em><br /></dt>
<dd><code>&lt;binding&gt;&lt;bnode&gt;</code><em>I</em><code>&lt;/bnode&gt;&lt;/binding&gt;</code></dd>

</dl>
<p>
If, for a particular solution, a variable is <em>unbound</em>, no
<code>binding</code> element for that variable is included in the
<code>result</code> element.
</p>
<p><strong>Note:</strong> The blank node label <em>I</em> is scoped
to the result set XML document and need not have any association to
the blank node label for that RDF Term in the query graph.</p>

<p>An example of a query solution encoded in this format is as follows:</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"&gt;

  &lt;head&gt;
    &lt;variable name="x"/&gt;
    &lt;variable name="hpage"/&gt;
    &lt;variable name="name"/&gt;
    &lt;variable name="age"/&gt;
    &lt;variable name="mbox"/&gt;
    &lt;variable name="friend"/&gt;
  &lt;/head&gt;

  &lt;results&gt;

    &lt;result&gt;
      &lt;binding name="x"&gt;
	&lt;bnode&gt;r2&lt;/bnode&gt;
      &lt;/binding&gt;
      &lt;binding name="hpage"&gt;
	&lt;uri&gt;http://work.example.org/bob/&lt;/uri&gt;
      &lt;/binding&gt;
      &lt;binding name="name"&gt;
	&lt;literal xml:lang="en"&gt;Bob&lt;/literal&gt;
      &lt;/binding&gt;
      &lt;binding name="age"&gt;
	&lt;literal datatype="http://www.w3.org/2001/XMLSchema#integer"&gt;30&lt;/literal&gt;
      &lt;/binding&gt;
      &lt;binding name="mbox"&gt;
	&lt;uri&gt;mailto:bob@work.example.org&lt;/uri&gt;
      &lt;/binding&gt;
    &lt;/result&gt;

    ...
  &lt;/results&gt;

&lt;/sparql&gt;
</pre>


<h3><a id="boolean-results" name="boolean-results">2.3.2. Boolean Results</a></h3>

<p>A boolean result is written as the element content of a
<code>boolean</code> child-element of the <code>sparql</code>
element directly after a <code>head</code>,
containing either <code>true</code> or <code>false</code> as follows:</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"&gt;
  ...  head ...

  &lt;boolean&gt;true&lt;/boolean&gt;

&lt;/sparql&gt;
</pre>


  <h2><a id="examples" name="examples">3. Examples</a></h2>

  <h2><a id="vb-examples" name="vb-examples">3.1. Variable Binding Results Examples</a></h2>

  <p>An example <code>SELECT</code> SPARQL Query in
  <a href="example.rq">example.rq</a> operating
  on query graph Turtle/N3 data in <a href="data.n3">data.n3</a>
  providing ordered variable binding query results written in XML
  in <a href="output.srx">output.srx</a>.
  </p>

  <p>This XML can be transformed into XHTML using the
  sample XML Query script <a href="result-to-html.xq">result-to-html.xq</a>
  giving <a href="output-xquery.html">output-xquery.html</a> or with
  XSLT sheet <a href="result-to-html.xsl">result-to-html.xsl</a>
  giving <a href="output-xslt.html">output-xslt.html</a></p>


  <h2><a id="boolean-examples" name="boolean-examples">3.2. Boolean Results Examples</a></h2>

  <p>An example <code>ASK</code> SPARQL Query in
  <a href="example2.rq">example2.rq</a> operating
  on query graph Turtle/N3 data in <a href="data.n3">data.n3</a>
  provides a boolean query result written in XML
  in <a href="output2.srx">output2.srx</a>.
  </p>

  <p>This XML can be transformed into XHTML using the
  sample XML Query script <a href="result-to-html.xq">result-to-html.xq</a>
  giving <a href="output-xquery2.html">output-xquery2.html</a> or with
  XSLT sheet <a href="result-to-html.xsl">result-to-html.xsl</a>
  giving <a href="output-xslt2.html">output-xslt2.html</a></p>


  <h2><a id="schemas" name="schemas">4. XML Schemas</a></h2>

  <p>There are normative XML schemas provided in the following formats:</p>

   <ol>
   <li>RELAX NG<a href="#ref-relaxng">[RELAXNG]</a> Compact<a href="#ref-relaxng-nx">[RELAXNG-COMPACT]</a> in <a href="http://www.w3.org/2007/SPARQL/result.rnc">result.rnc</a></li>
   <li>RELAX NG XML in <a href="http://www.w3.org/2007/SPARQL/result.rng">result.rng</a></li>
   <li>W3C XML Schema<a href="#ref-xmlschema-1">[XMLSCHEMA-1]</a> in <a href="http://www.w3.org/2007/SPARQL/result.xsd">result.xsd</a><br />
   Note: this schema is machine-generated from the RELAX NG XML schema.</li>
   </ol>

<p>If W3C XML Schema is used, an <code>xsi:schemaLocation</code>
attribute can be used pointing to the schema as follows:</p>

<pre class="xmlresult">
&lt;?xml version="1.0"?&gt;
&lt;sparql xmlns="http://www.w3.org/2005/sparql-results#"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:schemaLocation="http://www.w3.org/2007/SPARQL/result.xsd"&gt;

  ...

&lt;/sparql&gt;
</pre>


  <h2><a id="mime" name="mime">5. Internet Media Type, File Extension and Macintosh File Type</a></h2>

<p>The Internet Media Type / MIME Type for the SPARQL Query Results XML
Format is "application/sparql-results+xml".</p>

<p>It is recommended that result files have the extension ".srx" (all
lowercase) on all platforms.</p>

<p>It is recommended that result files stored on Macintosh HFS file
systems be given a file type of "TEXT".</p>

<p>This information that follows has been <a href="http://www.w3.org/mid/20060309080030.GR412@w3.org">submitted to the IESG</a> for review,
approval, and registration with IANA. The IESG has not responded as of the publication date of this document.</p>

<div class="mime">

<h3><a id="mime-form" name="mime-form">Internet Media Type Registration Form</a></h3>

<p>To: ietf-types@iana.org<br />
Subject: Registration of media type application/sparql-results+xml
</p>

<dl>
<dt>Type name:<br /></dt>
<dd>  application
</dd>

<dt>Subtype name:<br /></dt>
<dd>  sparql-results+xml
</dd>

<dt>Required parameters:<br /></dt>
<dd>  None
</dd>

<dt>Optional parameters:<br /></dt>
<dd>  "charset": This parameter has identical semantics to the charset
             parameter of the "application/xml" media type as
             specified in <a href="#mime-rfc-3023">[RFC3023]</a>, section 3.2.
</dd>

<dt>Encoding considerations:<br /></dt>
<dd>  Identical to those of "application/xml" as specified in <a href="#mime-rfc-3023">[RFC3023]</a>,
  section 3.2.
</dd>

<dt>Security considerations:<br /></dt>
<dd>
<p>SPARQL query results uses URIs.  See Section 7 of <a href="#mime-rfc-3986">[RFC3986]</a>.
</p>

<p>SPARQL query results uses IRIs.  See Section 8 of <a href="#mime-rfc-3987">[RFC3987]</a>.
</p>

<p>As this media type uses the "+xml" convention, it shares the same
  security considerations as described in <a href="#mime-rfc-3023">[RFC3023]</a>, section 10.
</p>
</dd>

<dt>Interoperability considerations:<br /></dt>
<dd>  There are no known interoperability issues.
</dd>

<dt>Published specification:<br /></dt>
<dd>  This specification.
</dd>

<dt>Applications which use this media type:<br /></dt>
<dd>  No known applications currently use this media type.
</dd>

<dt>Additional information:<br /></dt>
<dt>Magic number(s):<br /></dt>
<dd>  As specified for "application/xml" in <a href="#mime-rfc-3023">[RFC3023]</a>, section 3.2.
</dd>

<dt>File extension(s): <br /></dt>
<dd>  ".srx"
</dd>

<dt>Fragment identifiers:<br /></dt>
<dd>  Identical to that of "application/xml" as described in RFC 3023
  <a href="#mime-rfc-3023">[RFC3023]</a>, section 5.
</dd>

<dt>Base URI:<br /></dt>
<dd>  As specified in <a href="#mime-rfc-3023">[RFC3023]</a>, section 6.
</dd>

<dt>Macintosh file type code(s):<br /></dt>
<dd>  "TEXT"
</dd>

<dt>Person &amp; email address to contact for further information:<br /></dt>
<dd>  Dave Beckett, Eric Prud'hommeaux &lt;public-rdf-dawg-comments&#064;w3&#046;org&gt;
</dd>

<dt>Intended usage:<br /></dt>
<dd>  COMMON
</dd>

<dt>Restrictions on usage:<br /></dt>
<dd>  None
</dd>

<dt>Author/Change controller:<br /></dt>
<dd>  The SPARQL specification is a work product of the World Wide Web
  Consortium's RDF Data Access Working Group.  The W3C has change
  control over these specifications.
</dd>

</dl>

<h3><a id="mime-references" name="mime-references">References</a></h3>

<p><a name="mime-rfc-3023">[RFC3023]</a> Murata, M., St. Laurent, S., and D. Kohn, "XML Media Types",
          RFC 3023, January 2001.
</p>

<p><a name="mime-rfc-3986">[RFC3986]</a> Berners-Lee, T., Fielding, R., and L. Masinter, "Uniform
          Resource Identifier (URI): Generic Syntax", STD 66, RFC
          3986, January 2005.
</p>

<p><a name="mime-rfc-3987">[RFC3987]</a> Duerst, M. and M. Suignard, "Internationalized Resource
          Identifiers (IRIs)", RFC 3987, January 2005.
</p>

</div>


  <h2><a id="references" name="references">6. References</a></h2>

  <dl class="bib">

  <dt>
  <a id="ref-xml" name="ref-xml">[XML]</a>
  </dt>
  <dd>
  <cite><a href="http://www.w3.org/TR/2004/REC-xml-20040204/">Extensible Markup Language (XML) 1.0, Third Edition</a></cite>, T. Bray, J. Paoli, C.M. Sperberg-McQueen, E. Maler, F. Yergeau, Editors, W3C Recommendation, 4 February 2004.  This document is http://www.w3.org/TR/2004/REC-xml-20040204 .  The <a href="http://www.w3.org/TR/REC-xml/" title="Latest version of XML">latest version</a> is available at http://www.w3.org/TR/REC-xml .
  </dd>

  <dt>
  <a id="ref-sparql-query" name="ref-sparql-query">[SPARQL-QUERY]</a>
  </dt>
  <dd>
  <cite><a href="http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/">SPARQL Query Language for RDF</a></cite>, E. Prud'hommeaux, A. Seaborne, Editors, W3C Recommendation, 15 January 2008. This document is http://www.w3.org/TR/2008/REC-rdf-sparql-query-20080115/ .  The <a href="http://www.w3.org/TR/rdf-sparql-query/" title="Latest version of SPARQL Query Language for RDF">latest version</a> is available at http://www.w3.org/TR/rdf-sparql-query/ .
  </dd>

  <dt>
    <a id="ref-relaxng" name="ref-relaxng">[RELAXNG]</a>
  </dt>
  <dd><cite><a href="http://www.oasis-open.org/committees/relax-ng/spec-20011203.html">RELAX NG Specification</a></cite>, James Clark and MURATA Makoto, Editors, OASIS Committee Specification, 3 December 2001.  This document is http://www.oasis-open.org/committees/relax-ng/spec-20011203.html .  The <a href="http://www.oasis-open.org/committees/relax-ng/spec.html" title="Latest version of RELAX NG Specification">latest version</a> is available at http://www.oasis-open.org/committees/relax-ng/spec.html .</dd>

  <dt>
    <a id="ref-relaxng-nx" name="ref-relaxng-nx">[RELAXNG-COMPACT]</a>
  </dt>
  <dd><cite><a href="http://www.oasis-open.org/committees/relax-ng/compact-20021121.html">RELAX NG Compact Syntax</a></cite>, James Clark, Editor. OASIS Committee Specification, 21 November 2002.  This document is http://www.oasis-open.org/committees/relax-ng/compact-20021121.html .</dd>

  <dt>
    <a name="ref-xmlschema-1" id="ref-xmlschema-1">[XMLSCHEMA-1]</a>
  </dt>
  <dd>
    <cite>      <a href="http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/">XML Schema Part 1: Structures Second Edition</a></cite>, D. Beech, N. Mendelsohn, M. Maloney, H. S. Thompson,  Editors, W3C Recommendation, 28 October 2004.  This document is http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/ . The <a href="http://www.w3.org/TR/xmlschema-1/" title="Latest version of XML Schema Part 1: Structures Second Edition">latest version</a> is available at http://www.w3.org/TR/xmlschema-1/ .</dd>
  </dl>

</body>
</html>