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    <p>The short answer is that the data doesn't look quite like what your query expects it to look like. Let's look at the graph described by this RDF/XML snippet:</p> <pre class="lang-xml prettyprint-override"><code>&lt;rdf:RDF xml:base="http://example.org/" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:service="http://www.daml.org/services/owl-s/1.1/Service.owl#" xmlns:profile="http://www.daml.org/services/owl-s/1.1/Profile.owl#"&gt; &lt;profile:Profile rdf:ID="AddServiceName"&gt; &lt;service:presentedBy rdf:resource="AddServicePresenter"/&gt; &lt;profile:serviceName&gt;"ser"&lt;/profile:serviceName&gt; &lt;/profile:Profile&gt; &lt;/rdf:RDF&gt; </code></pre> <p>in Turtle format, which is much closer to the pattern language of SPARQL:</p> <pre class="lang-none prettyprint-override"><code>@prefix service: &lt;http://www.daml.org/services/owl-s/1.1/Service.owl#&gt; . @prefix rdf: &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt; . @prefix profile: &lt;http://www.daml.org/services/owl-s/1.1/Profile.owl#&gt; . &lt;http://example.org/#AddServiceName&gt; a profile:Profile ; profile:serviceName "\"ser\"" ; service:presentedBy &lt;http://example.org/AddServicePresenter&gt; . </code></pre> <p>In particular, note that an element in RDF/XML that corresponds to an subject or object in the RDF graph can use its XML element name as a shorthand for an <code>rdf:type</code> statement. So <code>&lt;profile:Profile rdf:ID="x"&gt;…&lt;/profile:Profile&gt;</code> says that the resource <code>&lt;...#x&gt;</code> has <code>rdf:type profile:Profile</code>. In Turtle and SPARQL, <code>a</code> is a shorthand for <code>rdf:type</code>, so <code>&lt;...#x&gt; a profile:Profile</code> means <code>&lt;...#x&gt; rdf:type profile:Profile</code>. The other properties of <code>&lt;...#x&gt;</code> are determined by the content of the element. In this case <code>&lt;...#AddServiceName&gt;</code> has two properties, one for <code>service:presentedBy</code> and one for <code>profile:serviceName</code>.</p> <p>To find profiles, their presenters, and names, you need a query like:</p> <pre><code>PREFIX rdfs: &lt;http://www.w3.org/2000/01/rdf-schema#&gt; PREFIX owl: &lt;http://www.w3.org/2002/07/owl#&gt; PREFIX rdf: &lt;http://www.w3.org/1999/02/22-rdf-syntax-ns#&gt; PREFIX service: &lt;http://www.daml.org/services/owl-s/1.1/Service.owl#&gt; PREFIX profile: &lt;http://www.daml.org/services/owl-s/1.1/Profile.owl#&gt; SELECT ?profile ?presenter ?name WHERE { ?profile a profile:Profile ; service:presentedBy ?presenter ; profile:serviceName ?name . } </code></pre> <p>The triple pattern could also be written in a more verbose form:</p> <pre><code>?profile rdf:type profile:Profile . ?profile service:presentedBy ?presenter . ?profile profile:serviceName ?name . </code></pre> <p>Running this query produces these results:</p> <pre><code>$ arq --query query.sparql --data data.rdf ----------------------------------------------------------------------------------------------- | profile | presenter | name | =============================================================================================== | &lt;http://example.org/#AddServiceName&gt; | &lt;http://example.org/AddServicePresenter&gt; | "\"ser\"" | ----------------------------------------------------------------------------------------------- </code></pre>
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    1. POparsing and querying OWL-S profile.owl file using Jena-2.5.7
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    1. USJoshua Taylor
    1. USJoshua Taylor
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    1. POparsing and querying OWL-S profile.owl file using Jena-2.5.7
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    1. COthank you a lot, but there is a problem in the syntax it may be related to the version of SPARQL or Jena or maybe both, the query didn't work.
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      1. USAws Dib
    2. COEven "profile:servicename" didn't work so I had to write the entire URI instead, and it's quiet frustrating
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    3. CO@AousDeeb URIs are case sensitive, so `profile:serviceName` is a different URI than `profile:servicename`.
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      1. USJoshua Taylor
 

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