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Migrate from quoted triples to triple terms
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‎spec/index.html

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@@ -7406,44 +7406,43 @@ <h5>TZ</h5>
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</section>
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<!-- QT -->
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<section id="func-quoted-triples">
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<h4>Functions on Quoted Triples</h4>
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<section id="func-triple-terms">
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<h4>Functions on Triple Terms</h4>
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<section id="func-triple">
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<h5>TRIPLE</h5>
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<pre class="prototype nohighlight">
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<span class="return">quoted triple</span> <span class="operator">TRIPLE</span> (<span class="type RDFterm">RDF term</span> <span class="name">subj</span>, <span class="type RDFterm">RDF term</span> <span class="name">pred</span>, <span class="type RDFterm">RDF term</span> <span
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<span class="return">triple term</span> <span class="operator">TRIPLE</span> (<span class="type RDFterm">RDF term</span> <span class="name">subj</span>, <span class="type RDFterm">RDF term</span> <span class="name">pred</span>, <span class="type RDFterm">RDF term</span> <span
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class="name">obj</span>)
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</pre>
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<pre class="query nohighlight">
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<span class="operator">&lt;&lt;</span> subj pred obj <span class="operator">&gt;&gt;</span>
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<span class="operator">&lt;&lt;(</span> subj pred obj <span class="operator">)&gt;&gt;</span>
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</pre>
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<p>
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If the 3-tuple (<code style="color:black">subj</code>,
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<code style="color:black">pred</code>,
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<code style="color:black">obj</code>)
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is an <a data-cite="RDF12-CONCEPTS#dfn-rdf-triple">RDF triple</a>
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(that is, <code style="color:black">subj</code> is an
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<a data-cite="RDF12-CONCEPTS#dfn-iri">IRI</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a> or
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<a data-cite="RDF12-CONCEPTS#dfn-iri">IRI</a> or
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<a data-cite="RDF12-CONCEPTS#dfn-blank-node">blank node</a>;
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<code style="color:black">pred</code> is an
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<a data-cite="RDF12-CONCEPTS#dfn-iri">IRI</a>;
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and <code style="color:black">obj</code> is an
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<a data-cite="RDF12-CONCEPTS#dfn-iri">IRI</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-blank-node">blank node</a> or
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<a data-cite="RDF12-CONCEPTS#dfn-literal">literal</a>)
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the function returns a quoted triple with these three elements.
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the function returns a triple term with these three elements.
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Otherwise, the function raises an error.
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</p>
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<p>
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As a shorthand notation, the <code>TRIPLE</code> function
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can also be written in the form of a
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<a href="#rExprQuotedTriple">quoted triple expression</a>
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using <code>&lt;&lt;</code> and <code>&gt;&gt;</code>. There is a
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<a href="#rExprQuotedTriple">triple term expression</a>
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using <code>&lt;&lt;(</code> and <code>)&gt;&gt;</code>. There is a
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syntax limitation to this shorthand form: the three elements of
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the quoted triple expression can only be variables and directly
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the triple term expression can only be variables and directly
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written RDF terms, not arbitrary expressions.
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In contrast, the function form, <code>TRIPLE</code>,
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can be used with arbitrary expressions.
@@ -7452,7 +7451,7 @@ <h5>TRIPLE</h5>
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PREFIX : &lt;http://example/&gt;
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SELECT ?s ?date {
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?s ?p ?o
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BIND( &lt;&lt; ?s ?p ?o &gt;&gt; AS ?qt )
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BIND( &lt;&lt;( ?s ?p ?o )&gt;&gt; AS ?qt )
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?qt :tripleAdded ?date
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}
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</pre>
@@ -7468,45 +7467,45 @@ <h5>TRIPLE</h5>
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<section id="func-subject">
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<h5>SUBJECT</h5>
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<pre class="prototype nohighlight"><span class="return">RDF term</span> <span class="operator">SUBJECT</span> (<span class="type RDFterm">quoted triple</span> <span class="name">quoted-triple</span>)</pre>
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<pre class="prototype nohighlight"><span class="return">RDF term</span> <span class="operator">SUBJECT</span> (<span class="type RDFterm">triple term</span> <span class="name">triple-term</span>)</pre>
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<p>
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If the argument is a
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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the function returns the
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<a data-cite="RDF12-CONCEPTS#dfn-subject">subject</a>
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of the quoted triple.
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of the triple term.
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If the argument is not a
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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an error is raised.
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</p>
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</section>
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<section id="func-predicate">
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<h5>PREDICATE</h5>
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<pre class="prototype nohighlight"><span class="return">RDF term</span> <span class="operator">PREDICATE</span> (<span class="type RDFterm">quoted triple</span> <span class="name">quoted-triple</span>)</pre>
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<pre class="prototype nohighlight"><span class="return">RDF term</span> <span class="operator">PREDICATE</span> (<span class="type RDFterm">triple term</span> <span class="name">triple-term</span>)</pre>
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<p>
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If the argument is a
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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the function returns the
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<a data-cite="RDF12-CONCEPTS#dfn-predicate">predicate</a>
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of the quoted triple.
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of the triple term.
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If the argument is not a
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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an error is raised.
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</p>
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</section>
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<section id="func-object">
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<h5>OBJECT</h5>
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<pre class="prototype nohighlight"><span class="return">RDF term</span> <span class="operator">OBJECT</span> (<span class="type RDFterm">quoted triple</span> <span class="name">quoted-triple</span>)</pre>
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<pre class="prototype nohighlight"><span class="return">RDF term</span> <span class="operator">OBJECT</span> (<span class="type RDFterm">triple term</span> <span class="name">triple-term</span>)</pre>
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<p>
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If the argument is a
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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the function returns the
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<a data-cite="RDF12-CONCEPTS#dfn-object">object</a>
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of the quoted triple.
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of the triple term.
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If the argument is not a
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<a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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<a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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an error is raised.
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</p>
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</section>
@@ -7515,7 +7514,7 @@ <h5>OBJECT</h5>
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<h5>isTRIPLE</h5>
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<pre class="prototype nohighlight"><span class="return">xsd:boolean</span> <span class="operator">isTRIPLE</span> (<span class="type RDFterm">RDF term</span> <span class="name">term</span>)</pre>
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<p>
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If the argument is a <a data-cite="RDF12-CONCEPTS#dfn-quoted-triple">quoted triple</a>,
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If the argument is a <a data-cite="RDF12-CONCEPTS#dfn-triple-term">triple term</a>,
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the function returns true.
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If the argument is any other kind of
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<a data-cite="RDF12-CONCEPTS#dfn-rdf-term">RDF term</a>,
@@ -11806,10 +11805,10 @@ <h2>Changes between SPARQL 1.1 Query Language and SPARQL 1.2 Query Language</h2>
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Normative changes:
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<ul>
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<li>Remove concepts of plain and simple literals, in favor of explicit mentions of xsd:string</li>
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<li>Update grammar for quoted triples and triple functions in <a href="#sparqlGrammar" class="sectionRef"></a></li>
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<li>Update grammar for triple terms and triple functions in <a href="#sparqlGrammar" class="sectionRef"></a></li>
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<li>Migrate XML Schema references to 1.1</li>
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<li>Update references to XPath from 2.0 to 3.1</li>
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<li>Add functions on quoted triples to <a href="#func-quoted-triples" class="sectionRef"></a></li>
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<li>Add functions on triple terms to <a href="#func-triple-terms" class="sectionRef"></a></li>
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</ul>
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</li>
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<li>

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