edit
authorGuus Schreiber <guus.schreiber@vu.nl>
Mon, 11 Nov 2013 22:29:42 +0100
changeset 1275 448e21a7f284
parent 1274 bbf66fd678b3
child 1276 aa3d07fe437d
edit
rdf-primer/index.html
--- a/rdf-primer/index.html	Mon Nov 11 19:10:49 2013 +0100
+++ b/rdf-primer/index.html	Mon Nov 11 22:29:42 2013 +0100
@@ -218,7 +218,7 @@
 
     <section id="subsection-statement">
 
-    <h3>RDF Statement</h3>
+    <h3>Triples</h3>
     
     <p>RDF allows us to make statements about resources.
     The format of these statements is simple. It always
@@ -230,7 +230,10 @@
     make a statement about. The <strong>predicate</strong> represents
     the feature we want to make a statement about. The
     <strong>object</strong> represents the value of the feature
-    for this subject. Informally speaking, RDF allows us to make
+    for this subject.Because RDF statements consist of three elements they are called
+    <strong>triples</strong>.</p>
+
+    <p>Informally speaking, RDF allows us to make
     statements of the form:</p> 
 
     <pre class="example">
@@ -243,8 +246,7 @@
       &lt;This video document&gt; &lt;is about&gt; &lt;the Mona Lisa&gt;
     </pre>
 
-    <p>Because RDF statements consist of three elements they are called
-    <strong>triples</strong>.  Resources typically occur in multiple
+    <p>Resources typically occur in multiple 
     triples, for example Bob and the Mona Lisa painting in the examples above. We
     can therefore visualise triples as a connected <strong>graph</strong>. Graphs consists
     of nodes and arcs. The subjects and
@@ -417,41 +419,18 @@
     We give an overview of these various syntaxes below, and illustrate
     them using the example above.</p>
 
-    <section id="subsection-ntriples">
-
-      <h3>N-Triples</h3>
-
-      <p>N-Triples [[N-TRIPLES]]
-      provides a simple line-based, plain text way for serializing RDF graphs. Each line represents
-      an RDF triple. Its subject, predicate and object are separated by white space. Our example
-      can be represented in N-Triples as follows.</p>
-
-      <pre>
-&lt;http://example.org/bob#me&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt;.
-&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/knows&gt; &lt;http://example.org/alice#me&gt;.
-&lt;http://example.org/bob#me&gt; &lt;http://schema.org/birthDate&gt; "1990-07-04"^^&lt;http://www.w3.org/2001/XMLSchema#date&gt;.
-&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/topic_interest&gt; &lt;http://www.wikidata.org/entity/Q12418&gt;.
-&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt;.
-&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://xmlns.com/foaf/0.1/name&gt; "Leonardo da Vinci".
-&lt;http://www.wikidata.org/entity/Q12418&gt; &lt;http://purl.org/dc/terms/creator&gt; &lt;http://viaf.org/viaf/24604287/&gt;.
-&lt;http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619&gt; &lt;http://purl.org/dc/terms/subject&gt; &lt;http://www.wikidata.org/entity/Q12418&gt;.
-      </pre>
-
-      <p>N-Triples is often used for RDF examples, exchanging large RDF datasets, and processing large RDF graphs
-      with line-oriented text processing tools.</p>
-
-    </section>
-
     <section id="subsection-turtle">
 
       <h3>Turtle</h3>
 
       <p>Turtle [[TURTLE]] provides a convenient syntax for RDF graphs, introducing numerous
-      syntax shortcuts when compared with N-Triples, such as the support for namespaces, lists and shorthands for data-typed
-      literals. Turtle provides a good trade-off between ease of writing, ease of parsing and readability. Our example can be represented in
-      Turtle as follows.</p>
+      syntax shortcuts, such as the
+      support for namespaces, lists and shorthands for datatyped 
+      literals. Turtle provides a good trade-off between ease of
+      writing, ease of parsing and readability. Our single-graph example can be
+      represented in Turtle as follows.</p>
 
-      <pre>
+      <pre class="example" id="turtle-example">
 @base &lt;http://example.org/&gt; .
 @prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt; .
 @prefix xsd: &lt;http://www.w3.org/2001/XMLSchema#&gt; .
@@ -478,18 +457,167 @@
 
     </section>
 
+    <section id="subsection-trig">
+
+      <h3>TriG</h3>
+
+      <p>TriG [[TRIG]] is an extension to the Turtle syntax enabling
+      the exchange of multiple graphs in the form of RDF datasets. For example we could write 
+      our multi-graph example in TriG as follows.</p>
+
+      <pre class="example" id="trig-example">
[email protected] &lt;http://example.org/&gt; .
[email protected] foaf: &lt;http://xmlns.com/foaf/0.1/&gt; .
[email protected] xsd: &lt;http://www.w3.org/2001/XMLSchema#&gt; .
[email protected] schema: &lt;http://schema.org/&gt; .
[email protected] dcterms: &lt;http://purl.org/dc/terms/&gt; .
[email protected] wd: &lt;http://www.wikidata.org/entity/&gt; .
+
+&lt;http://example.org/bob&gt;
+  {
+    &lt;bob#me&gt;
+      a foaf:Person ;
+      foaf:knows &lt;alice#me&gt; ;
+      schema:birthDate "1990-07-04"^^xsd:date ;
+      foaf:topic_interest wd:Q12418 .
+  }
+
+&lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt;
+  {
+    &lt;http://viaf.org/viaf/24604287/&gt;
+      a foaf:Person ;
+      foaf:name "Leonardo da Vinci" .
+
+    wd:Q12418
+      dcterms:creator &lt;http://viaf.org/viaf/24604287/&gt; .
+
+    &lt;http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619&gt;
+      dcterms:subject wd:Q12418 .
+  }
+      </pre>
+
+    </section>
+
+    <section id="subsection-other-syntaxes">
+
+    <h3>Other concrete syntaxes for RDF</h3>
+
+    <dl>
+      <dt>RDFa</dt>
+      <dd>RDFa [[RDFA-PRIMER]] can be used to embed RDF data within
+      HTML documents. @@ extend, <a href="#rdfa-example">example</a></dd>
+
+      <dt>JSON-LD</dt>
+      <dd>JSON-LD [[JSON-LD]] provides a JSON syntax for RDF graphs and datasets.
+      JSON-LD can be used to transform JSON documents to RDF with
+      minimal changes, therefore bringing the benefits of RDF to the
+      JSON world. These benefits include universal identifiers for
+      JSON objects, a mechanism in which a JSON document can refer to 
+      an object described in another JSON document elsewhere on the
+      Web, as well as datatype and language handling. JSON-LD
+      [[JSON-LD]] also provides a way to serialize RDF datasets 
+      through the use of the <code>@graph</code> keyword.
+      We could write our dataset example in JSON-LD as follows.</dd>
+
+      <dt>N-Triples</dt>
+      <dd>N-Triples [[N-TRIPLES]]
+      provides a simple line-based, plain text way for serializing RDF graphs. Each line represents
+      an RDF triple. Its subject, predicate and object are separated
+      by white space. N-Triples is often used for RDF examples,
+      exchanging large RDF datasets, and processing large RDF graphs 
+      with line-oriented text processing tools.</dd>
+
+      <dt>N-Quads</dt>
+      <dd>N-Quads [[N-QUADS]] is
+      a simple extension to N-Triples enabling the exchange of RDF datasets. N-Quads adds a fourth
+      element to each line, capturing the graph IRI of the triple described on that line. For example
+      we could split our "Mona Lisa" example in two graphs <a
+      href="#subsection-graphs">as we did above</a> 
+      and serialize the resulting dataset in N-Quads as follows.</dd>
+
+      <dt>RDF/XML</dt>
+      <dd>RDF/XML [[RDF-SYNTAX-GRAMMAR]] provides an XML syntax for RDF
+      graphs. RDF/XML was the only normative syntax for RDF before the
+      RDF 1.1 set of recommendations introduced multiple 
+      syntaxes for RDF graphs. Our example can be represented in RDF/XML as follows.</dd>
+   </dl> 
+
+
+
+
+<section id="section-vocabulary">
+
+    <h2>RDF Data and Vocabularies</h2>
+
+    <p></p>
+
+</section>
+
+<section id="section-semantics">
+
+    <h2>RDF Graphs and what you can do with them</h2>
+
+    <p></p>
+
+</section>
+
+
+<section id="section-roadmap">
+  <h2>Document roadmap</h2>  
+</section>
+
+
+
+
+<section id="section-syntaxes" class="appendix">
+
+<p>In Sec. <a href="#section-graph-syntax">"Writing RDF Graphs"</a> the
+different concrete syntaxes of RDF are briefly described. Examples are
+given only of the Turtle and TriG syntax. This appendix lists
+corresponding examples for the other syntaxes listed. The
+single-graph examples encode the same information as the <a href="#turtle-example">Turtle
+example</a>; the mutiple-graphs examples encode the same information as the <a href="#trig-example">Trig
+example</a>. </p>
+
+
+      <section id="subsection-rdfa">
+   
+      <h3>RDFa</h3>
+
+      <p>Single-graph example:</p>
+
+      <pre class="example" id="rdfa-example">
+&lt;div prefix="
+  rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
+  foaf: http://xmlns.com/foaf/0.1/
+  wd: http://www.wikidata.org/entity/
+  dcterms: http://purl.org/dc/terms/
+  xsd: http://www.w3.org/2001/XMLSchema#"&gt;
+    &lt;div typeof="foaf:Person" about="http://example.org/bob#me"&gt;
+      &lt;p&gt;
+        Bob knows &lt;a rel="foaf:knows" href="http://example.org/alice#me"&gt;Alice&lt;/a&gt;
+        and was born on the &lt;span property="schema:birthDate" datatype="xsd:date"&gt;1990-07-04&lt;/span&gt;.
+      &lt;/p&gt;
+      &lt;p&gt;
+        Bob is interested in &lt;a rel="foaf:topic_interest" resource="wd:Q12418"&gt;the Mona Lisa&lt;/a&gt;.
+      &lt;/p&gt;
+      &lt;div about="wd:Q12418"&gt;
+        The Mona Lisa was painted by &lt;a rel="dcterms:creator" typeof="foaf:Person" href="http://viaf.org/viaf/24604287/"&gt;&lt;span property="foaf:name"&gt;Leonardo da Vinci&lt;/span&gt;&lt;/a&gt;
+        and is the subject of this &lt;a rev="dcterms:subject" href="http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619"&gt;video document&lt;/a&gt;.
+      &lt;/div&gt;
+  &lt;/div&gt;
+&lt;/div&gt;
+      </pre>
+
+    </section>
+
     <section id="subsection-jsonld">
 
       <h3>JSON-LD</h3>
 
-      <p>JSON-LD [[JSON-LD]] provides a JSON syntax for RDF graphs and datasets.
-      JSON-LD can be used to transform JSON documents to RDF with minimal changes, therefore bringing the benefits of RDF to the JSON
-      world. These benefits include universal identifiers for JSON objects, a mechanism in which a JSON document can refer to
-      an object described in another JSON document elsewhere on the Web, as well as datatype and language handling. Our example
-      can be represented in JSON-LD as follows.
-      </p>
+      Single-graph example:
 
-      <pre>
+      <pre class="example" id="json-ld-example-signle">
 {
   "@context": {
     "foaf": "http://xmlns.com/foaf/0.1/",
@@ -523,158 +651,9 @@
 }
       </pre>
 
-    </section>
-
-    <section id="subsection-rdfa">
-
-      <h3>RDFa</h3>
-
-      <p>RDFa [[RDFA-PRIMER]] can be used to embed RDF data within HTML documents. Our example
-      can be represented in RDFa as follows.
-      </p>
-
-      <pre>
-&lt;div prefix="
-  rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#
-  foaf: http://xmlns.com/foaf/0.1/
-  wd: http://www.wikidata.org/entity/
-  dcterms: http://purl.org/dc/terms/
-  xsd: http://www.w3.org/2001/XMLSchema#"&gt;
-    &lt;div typeof="foaf:Person" about="http://example.org/bob#me"&gt;
-      &lt;p&gt;
-        Bob knows &lt;a rel="foaf:knows" href="http://example.org/alice#me"&gt;Alice&lt;/a&gt;
-        and was born on the &lt;span property="schema:birthDate" datatype="xsd:date"&gt;1990-07-04&lt;/span&gt;.
-      &lt;/p&gt;
-      &lt;p&gt;
-        Bob is interested in &lt;a rel="foaf:topic_interest" resource="wd:Q12418"&gt;the Mona Lisa&lt;/a&gt;.
-      &lt;/p&gt;
-      &lt;div about="wd:Q12418"&gt;
-        The Mona Lisa was painted by &lt;a rel="dcterms:creator" typeof="foaf:Person" href="http://viaf.org/viaf/24604287/"&gt;&lt;span property="foaf:name"&gt;Leonardo da Vinci&lt;/span&gt;&lt;/a&gt;
-        and is the subject of this &lt;a rev="dcterms:subject" href="http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619"&gt;video document&lt;/a&gt;.
-      &lt;/div&gt;
-  &lt;/div&gt;
-&lt;/div&gt;
-      </pre>
-
-    </section>
-
-    <section id="subsection-rdfxml">
-
-      <h3>RDF/XML</h3>
-
-      <p>RDF/XML [[RDF-SYNTAX-GRAMMAR]] provides an XML syntax for RDF
-      graphs. RDF/XML was the only normative syntax for RDF before the RDF 1.1 set of recommendations introduced multiple
-      syntaxes for RDF graphs. Our example can be represented in RDF/XML as follows.</p>
-
-      <pre>
-&lt;?xml version="1.0" encoding="utf-8"?&gt;
-&lt;rdf:RDF
-   xmlns:dcterms="http://purl.org/dc/terms/"
-   xmlns:foaf="http://xmlns.com/foaf/0.1/"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:schema="http://schema.org/"
-   xmlns:wd="http://www.wikidata.org/entity/"
-   xmlns:xsd="http://www.w3.org/2001/XMLSchema#"&gt;
-  &lt;foaf:Person rdf:about="http://example.org/bob#me"&gt;
-    &lt;schema:birthDate rdf:datatype="http://www.w3.org/2001/XMLSchema#date"&gt;1990-07-04&lt;/schema:birthDate&gt;
-    &lt;foaf:knows rdf:resource="http://example.org/alice#me"/&gt;
-    &lt;foaf:topic_interest rdf:resource="http://www.wikidata.org/entity/Q12418"/&gt;
-  &lt;/foaf:Person&gt;
-  &lt;foaf:Person rdf:about="http://viaf.org/viaf/24604287/"&gt;
-    &lt;foaf:name&gt;Leonardo da Vinci&lt;/foaf:name&gt;
-  &lt;/foaf:Person&gt;
-  &lt;rdf:Description rdf:about="http://www.wikidata.org/entity/Q12418"&gt;
-    &lt;dcterms:creator rdf:resource="http://viaf.org/viaf/24604287/"/&gt;
-  &lt;/rdf:Description&gt;
-  &lt;rdf:Description rdf:about="http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619"&gt;
-    &lt;dcterms:subject rdf:resource="http://www.wikidata.org/entity/Q12418"/&gt;
-  &lt;/rdf:Description&gt;
-&lt;/rdf:RDF&gt;
-      </pre>
-
-    </section>
-
-</section>
-
-<section id="section-dataset-syntax">
+     <p>Multiple-graphs example:</p>
 
-    <h2>Writing RDF datasets</h2>
-
-    <p>Syntaxes are also available to serialize and exchange RDF datasets (collections of graphs).</p> 
-
-    <section id="subsection-nquads">
-
-      <h3>N-Quads</h3>
-
-      <p>N-Quads [[N-QUADS]] is
-      a simple extension to N-Triples enabling the exchange of RDF datasets. N-Quads adds a fourth
-      element to each line, capturing the graph IRI of the triple described on that line. For example
-      we could split our "Mona Lisa" example in two graphs <a href="#subsection-graphs">as we did above</a>
-      and serialize the resulting dataset in N-Quads as follows.</p>
-
-      <pre>
-&lt;http://example.org/bob#me&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt; &lt;http://example.org/bob&gt; .
-&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/knows&gt; &lt;http://example.org/alice#me&gt; &lt;http://example.org/bob&gt; .
-&lt;http://example.org/bob#me&gt; &lt;http://schema.org/birthDate&gt; "1990-07-04"^^&lt;http://www.w3.org/2001/XMLSchema#date&gt; &lt;http://example.org/bob&gt; .
-&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/topic_interest&gt; &lt;http://www.wikidata.org/entity/Q12418&gt; &lt;http://example.org/bob&gt; .
-&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt; &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
-&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://xmlns.com/foaf/0.1/name&gt; "Leonardo da Vinci" &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
-&lt;http://www.wikidata.org/entity/Q12418&gt; &lt;http://purl.org/dc/terms/creator&gt; &lt;http://viaf.org/viaf/24604287/&gt; &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
-&lt;http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619&gt; &lt;http://purl.org/dc/terms/subject&gt; &lt;http://www.wikidata.org/entity/Q12418&gt; &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
-      </pre>
-
-    </section>
-
-    <section id="subsection-trig">
-
-      <h3>TriG</h3>
-
-      <p>TriG [[TRIG]]
-      is an extension to the Turtle syntax enabling the exchange of RDF datasets. For example we could write
-      our example in TriG as follows.</p>
-
-      <pre>
[email protected] &lt;http://example.org/&gt; .
[email protected] foaf: &lt;http://xmlns.com/foaf/0.1/&gt; .
[email protected] xsd: &lt;http://www.w3.org/2001/XMLSchema#&gt; .
[email protected] schema: &lt;http://schema.org/&gt; .
[email protected] dcterms: &lt;http://purl.org/dc/terms/&gt; .
[email protected] wd: &lt;http://www.wikidata.org/entity/&gt; .
-
-&lt;http://example.org/bob&gt;
-  {
-    &lt;bob#me&gt;
-      a foaf:Person ;
-      foaf:knows &lt;alice#me&gt; ;
-      schema:birthDate "1990-07-04"^^xsd:date ;
-      foaf:topic_interest wd:Q12418 .
-  }
-
-&lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt;
-  {
-    &lt;http://viaf.org/viaf/24604287/&gt;
-      a foaf:Person ;
-      foaf:name "Leonardo da Vinci" .
-
-    wd:Q12418
-      dcterms:creator &lt;http://viaf.org/viaf/24604287/&gt; .
-
-    &lt;http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619&gt;
-      dcterms:subject wd:Q12418 .
-  }
-      </pre>
-
-    </section>
-
-    <section id="subsection-jsonld-dataset">
-
-      <h3>JSON-LD</h3>
-
-      <p>JSON-LD [[JSON-LD]] also provides a way to serialize RDF datasets
-      through the use of the <code>@graph</code> keyword.
-      We could write our dataset example in JSON-LD as follows.</p>
-
-      <pre>
+      <pre class="example" id="json-ld-example-multiple">
 {
   "@context": {
     "foaf": "http://xmlns.com/foaf/0.1/",
@@ -724,36 +703,88 @@
 
     </section>
 
-</section>
 
-<section id="section-vocabulary">
+<section id="subsection-ntriples">
 
-    <h2>RDF Data and Vocabularies</h2>
+      <h3>N-Triples</h3>
 
-    <p></p>
+      <p>Single-graph example: </p>
+
+      <pre class="example" id="n-triples-example">
+&lt;http://example.org/bob#me&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt;.
+&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/knows&gt; &lt;http://example.org/alice#me&gt;.
+&lt;http://example.org/bob#me&gt; &lt;http://schema.org/birthDate&gt; "1990-07-04"^^&lt;http://www.w3.org/2001/XMLSchema#date&gt;.
+&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/topic_interest&gt; &lt;http://www.wikidata.org/entity/Q12418&gt;.
+&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt;.
+&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://xmlns.com/foaf/0.1/name&gt; "Leonardo da Vinci".
+&lt;http://www.wikidata.org/entity/Q12418&gt; &lt;http://purl.org/dc/terms/creator&gt; &lt;http://viaf.org/viaf/24604287/&gt;.
+&lt;http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619&gt; &lt;http://purl.org/dc/terms/subject&gt; &lt;http://www.wikidata.org/entity/Q12418&gt;.
+      </pre>
+
+     </section>
+
+    <section id="subsection-nquads">
+
+      <h3>N-Quads</h3>
+
+      <pre class="example" id="n-quads-example">
+&lt;http://example.org/bob#me&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt; &lt;http://example.org/bob&gt; .
+&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/knows&gt; &lt;http://example.org/alice#me&gt; &lt;http://example.org/bob&gt; .
+&lt;http://example.org/bob#me&gt; &lt;http://schema.org/birthDate&gt; "1990-07-04"^^&lt;http://www.w3.org/2001/XMLSchema#date&gt; &lt;http://example.org/bob&gt; .
+&lt;http://example.org/bob#me&gt; &lt;http://xmlns.com/foaf/0.1/topic_interest&gt; &lt;http://www.wikidata.org/entity/Q12418&gt; &lt;http://example.org/bob&gt; .
+&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#type&gt; &lt;http://xmlns.com/foaf/0.1/Person&gt; &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
+&lt;http://viaf.org/viaf/24604287/&gt; &lt;http://xmlns.com/foaf/0.1/name&gt; "Leonardo da Vinci" &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
+&lt;http://www.wikidata.org/entity/Q12418&gt; &lt;http://purl.org/dc/terms/creator&gt; &lt;http://viaf.org/viaf/24604287/&gt; &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
+&lt;http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619&gt; &lt;http://purl.org/dc/terms/subject&gt; &lt;http://www.wikidata.org/entity/Q12418&gt; &lt;https://www.wikidata.org/wiki/Special:EntityData/Q12418&gt; .
+      </pre>
+
+    </section>
+
+    <section id="subsection-rdf-xml">
+
+    <h3>RDF/XML</h3>
+
+    <p>Single-graph example:</p>
+
+      <pre class="example" id="rdf-xml-example">
+&lt;?xml version="1.0" encoding="utf-8"?&gt;
+&lt;rdf:RDF
+   xmlns:dcterms="http://purl.org/dc/terms/"
+   xmlns:foaf="http://xmlns.com/foaf/0.1/"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:schema="http://schema.org/"
+   xmlns:wd="http://www.wikidata.org/entity/"
+   xmlns:xsd="http://www.w3.org/2001/XMLSchema#"&gt;
+  &lt;foaf:Person rdf:about="http://example.org/bob#me"&gt;
+    &lt;schema:birthDate rdf:datatype="http://www.w3.org/2001/XMLSchema#date"&gt;1990-07-04&lt;/schema:birthDate&gt;
+    &lt;foaf:knows rdf:resource="http://example.org/alice#me"/&gt;
+    &lt;foaf:topic_interest rdf:resource="http://www.wikidata.org/entity/Q12418"/&gt;
+  &lt;/foaf:Person&gt;
+  &lt;foaf:Person rdf:about="http://viaf.org/viaf/24604287/"&gt;
+    &lt;foaf:name&gt;Leonardo da Vinci&lt;/foaf:name&gt;
+  &lt;/foaf:Person&gt;
+  &lt;rdf:Description rdf:about="http://www.wikidata.org/entity/Q12418"&gt;
+    &lt;dcterms:creator rdf:resource="http://viaf.org/viaf/24604287/"/&gt;
+  &lt;/rdf:Description&gt;
+  &lt;rdf:Description rdf:about="http://data.europeana.eu/item/04802/243FA8618938F4117025F17A8B813C5F9AA4D619"&gt;
+    &lt;dcterms:subject rdf:resource="http://www.wikidata.org/entity/Q12418"/&gt;
+  &lt;/rdf:Description&gt;
+&lt;/rdf:RDF&gt;
+      </pre>
 
 </section>
 
-<section id="section-semantics">
+</section>
+   
+<section class="appendix" id="changes">
+  <h2>Changes from RDF 2004</h2>
 
-    <h2>RDF Graphs and what you can do with them</h2>
-
-    <p></p>
-
+  <ul>
+   <li>..</li>
+  </ul>
 </section>
 
-<section id="section=multiple-graphs">
-
-    <h2>Multiple graphs</h2>
-
-</section>
-
-
-<section id="section-roadmap">
-  <h2>Document roadmap</h2>  
-</section>
-
-<section id="section-Acknowledgments">
+  <section id="section-Acknowledgments" class-"appendix">
     <h2>Acknowledgments</h2>
 
     <p class="issue">This section does not yet list those who made
@@ -777,15 +808,6 @@
 </section>
 
 
-<section class="appendix informative" id="changes">
-  <h2>Changes from RDF 2004</h2>
-
-  <ul>
-   <li>..</li>
-  </ul>
-</section>
-
-
 <section id="references"></section>
 
   </body>