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OSLC Core Appendix B: RDF/XML Representation Examples DRAFT

By: The OSLC Core Workgroup

Overview

In this appendix we introduce a fictional service with two resource types and then provide examples representations of those resources, a Resource Shape, a Query Resource Shape, a Service Provider and query results in RDF/XML format. These example representations conform to the OSLC Core rules for RDF/XML representations.

Example Resources: fictional OSLC Blog Service

For the sole purpose of providing representation examples, we will define a fictional OSLC Blog Service with two resources: Blog Comment and Blog Comment. Each resource has a small set of required properties and each Comment is associated with an Entry. We will use these definitions in the RDF/XML examples in this appendix and in the JSON, Atom XML and Turtle examples that follow.

For example, we will define the blog entry and blog comment resources as follows:

  • Name: Entry
  • Namespace URI: http://open-services.net/xmlns/bogus/blogs#
  • Type URI: http://open-services.net/xmlns/bogus/bogus/blogs#Entry
  • Properties:
    • dc:title (XML Literal, exactly-one) title of Podcast
    • dc:modified (DateTime, exactly-one) - date/time that comment was created
    • dc:creator (Local In-Line Resource of type foaf:Person, exactly-one) - name of comment author
    • dc:content (XML Literal, exactly-one) - content of the comment

  • Name: Comment
  • Namespace URI: =http://open-services.net/xmlns/bogus/blogs=
  • Type URI: http://open-services.net/xmlns/bogus/blogs#Comment
  • Properties:
    • dc:modified (DateTime, exactly-one) - date/time that comment was created
    • dc:creator (In-Line Resource of type foaf:Person, exactly-one) - name of comment author
    • dc:content (XML Literal, exactly-one) - content of the comment
    • blog:entry (Resource, exactly-one of type blog:Entry) - link to the Blog Entry

Next, the RDF/XML examples for the key resources in our fictional OSLC Blog Service.

Resources

Below is an example RDF/XML representation of a blog entry.

Click HERE to see RDF/XML validation results, triples and RDF graph. 

<oslc_blog:Entry
   rdf:about="http://example.com/blogs/entry/42"
   xmlns:oslc_blog="http://open-services.net/xmlns/oslc-core/bogus/blogs#" 
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:foaf="http://http://xmlns.com/foaf/0.1/"
   xmlns:dc="http://purl.org/dc/elements/1.1/">

   <rdf:type 
      rdf:resource="http://open-services.net/xmlns/oslc-core/bogus/blogs#Entry" />

   <dc:title>I love trash</dc:title>
   <dc:modified>2002-10-10T12:00:00-05:00</dc:modified>
   <dc:content>
      Anything dirty or dingy or dusty. 
      Anything ragged or rotten or rusty.
   </dc:content>
   <dc:creator>
      <foaf:Person>
          <foaf:name>Oscar T. Grouch</foaf:name>
      </foaf:Person>
   </dc:creator>

</oslc_blog:Entry>

Below is an example RDF/XML representation of a blog comment.

Click HERE to see RDF/XML validation results, triples and RDF graph. 

<oslc_blog:Comment 
   rdf:about="http://example.com/comments/883"
   xmlns:oslc_blog="http://open-services.net/xmlns/oslc-core/bogus/blogs#" 
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:foaf="http://http://xmlns.com/foaf/0.1/"
   xmlns:dc="http://purl.org/dc/elements/1.1/" >

   <oslc_blog:entry rdf:resource="http://example.com/blogs/entry/42" />
   <dc:content>LOL! Tell us how you really feel, Oscar.</dc:content>
   <dc:modified>2002-10-10T12:12:23-05:00</dc:modified>
   <dc:creator>
      <foaf:Person>
          <foaf:name>William B. Bird</foaf:name>
      </foaf:Person>
   </dc:creator>

</oslc_blog:Comment>

Shape Resources

Below is an example RDF/XML representation of a Resource Shape for the Blog Comment resource defined above.

Click HERE to see RDF/XML validation results, triples and RDF graph. 

<oslc:Shape
   rdf:about="http://example.com/shapes/commentshape"
   xmlns:oslc="http://open-services.net/xmlns/oslc-core#" 
   xmlns:oslc_blog="http://open-services.net/xmlns/oslc-core/bogus/blogs#" 
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:foaf="http://http://xmlns.com/foaf/0.1/"
   xmlns:dc="http://purl.org/dc/elements/1.1/">

     <dc:title>Blog Comment Shape</dc:title>
     <rdf:type rdf:resource="http://open-services.net/xmlns/oslc#Shape" />

     <oslc:name>Comment</oslc:name>
     <oslc:namespace rdf:resource="http://open-services.net/xmlns/bogus/blog#" />
     <oslc:describes rdf:resource="http://open-services.net/xmlns/bogus/blog#Comment" />

     <oslc:property>
         <oslc:Property>
             <oslc:name>modified</oslc:name>
             <oslc:occurs>exactly-one</oslc:occurs>
             <oslc:namespace rdf:resource="http://purl.org/dc/terms#" />
             <rdf:type rdf:resource="http://purl.org/dc/terms#modified" />
             <oslc:valueType rdf:resource="http://www.w3.org/2001/XMLSchema#dateTime" />
         </oslc:Property>
     </oslc:property>

     <oslc:property>
         <oslc:Property>
             <oslc:name>creator</oslc:name>
             <oslc:occurs>exactly-one</oslc:occurs>
             <oslc:namespace rdf:resource="http://purl.org/dc/terms#"/>
             <rdf:type rdf:resource="http://purl.org/dc/terms#creator" />
             <oslc:valueType rdf:resource="http://open-service.net/xmlns/oslc-core/resource-types#LocalInlineResource" />
             <oslc:shape rdf:resource="http://example.com/blogs/personshape" />
         </oslc:Property>
     </oslc:property>

     <oslc:property>
         <oslc:Property>
             <oslc:name>content</oslc:name>
             <oslc:namespace rdf:resource="http://purl.org/dc/terms#" />
             <rdf:type rdf:resource="http://purl.org/dc/terms#content" />
             <oslc:valueType rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral" />
             <oslc:occurs>exactly-one</oslc:occurs>
         </oslc:Property>
     </oslc:property>

     <oslc:property>
         <oslc:Property>
             <oslc:name>entry</oslc:name>
             <oslc:namespace rdf:resource="http://purl.org/dc/terms#" />
             <rdf:type rdf:resource="http://purl.org/dc/terms#content" />
             <oslc:valueType rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#XMLLiteral" />
             <oslc:occurs>exactly-one</oslc:occurs>
         </oslc:Property>
     </oslc:property>

</oslc:Shape>

Query Shape Resource

Below is a Resource Shape that specifies a Query Resource that can have blog entry and blog comment values.

Click HERE to see RDF/XML validation results, triples and RDF graph. 

<oslc:Shape
     rdf:about="http://example.com/shapes/blogquery"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:dc="http://purl.org/dc/terms#"
     xmlns:oslc="http://open-services.net/xmlns/oslc#">

     <dc:title>Blog Query Shape</dc:title>
     <rdf:type rdf:resource="http://open-services.net/xmlns/oslc#Shape" />

     <oslc:name>BlogQuery</oslc:name>
     <oslc:namespace rdf:resource="http://open-services.net/xmlns/bogus#" />
     <oslc:describes rdf:resource="http://open-services.net/xmlns/bogus#BlogQuery" />

     <oslc:property>
         <oslc:Property>
             <oslc:name>entry</oslc:name>
             <oslc:namespace rdf:resource="http://open-services.net/xmlns/blog#" />
             <oslc:occurs>zero-or-many</oslc:occurs>
             <oslc:shape rdf:resource="http://example.com/blogs/entryshape" />
             <rdf:type rdf:resource="http://open-services.net/xmlns/blog#Entry" />
             <oslc:valueType rdf:resource="http://open-service.net/xmlns/oslc-core/resource-types#InlineResource" />
             <oslc:isMemberProperty>true</oslc:isMemberProperty>
         </oslc:Property>
     </oslc:property>

     <oslc:property>
          <oslc:Property>
             <oslc:name>comment</oslc:name>
             <oslc:namespace rdf:resource="http://open-services.net/xmlns/blog#" />
             <oslc:occurs>zero-or-many</oslc:occurs>
             <oslc:shape rdf:resource="http://example.com/blogs/commentshape" />
             <rdf:type rdf:resource="http://open-services.net/xmlns/blog#Comment" />
             <oslc:isMemberProperty>true</oslc:isMemberProperty>
             <oslc:valueType rdf:resource="http://open-service.net/xmlns/oslc-core/resource-types#InlineResource" />
         </oslc:Property>
     </oslc:property>
 
     <oslc:property>
          <oslc:Property>
             <oslc:name>responseInfo</oslc:name>
             <oslc:namespace rdf:resource="http://open-services.net/xmlns/oslc#" />
             <oslc:occurs>zero-or-one</oslc:occurs>
             <oslc:shape rdf:resource="http://example.com/blogs/responseInfoShape" />
             <rdf:type rdf:resource="http://open-services.net/xmlns/oslc#ResponseInfo" />
             <oslc:valueType rdf:resource="http://open-service.net/xmlns/oslc-core/resource-types#InlineResource" />
         </oslc:Property>
     </oslc:property>
 
  </oslc:Shape>

Service Provider Resource

Below is an RDF/XML representation of a Service Provider resource for the fictional Blog Service.

Click HERE to see RDF/XML validation results, triples and RDF graph. 

<oslc:ServiceProvider 
   rdf:about="http://example.com/service-provider"
   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
   xmlns:dc="http://purl.org/dc/terms#" 
   xmlns:oslc="http://open-services.net/xmlns/oslc#"
   xml:lang="en">

   <dc:title>Blogging Service</dc:title>  
   <dc:description>Example OSLC Blog Service</dc:description>

   <dc:contributor>
      <oslc:Contributor>
         <dc:title>OSLC Core Workgroup documentation department</dc:title>
         <dc:identifier>com.example.oslc.blogservice</dc:identifier>
         <oslc:icon rdf:resource="http://example.com/icons/blogservice.ico" />
      </oslc:Contributor>
   </dc:contributor>
   
   <oslc:namespaceDefinition>
      <oslc:NamepaceDefintion>
         <oslc:prefix>rdf</oslc:prefix>
         <oslc:namespaceURI>http://www.w3.org/1999/02/22-rdf-syntax-ns#</oslc:namespaceURI>
      </oslc:NamepaceDefintion>
   </oslc:namespaceDefinition>

   <oslc:namespaceDefinition>
      <oslc:NamepaceDefintion>
         <oslc:prefix>dc</oslc:prefix>
         <oslc:namespaceURI>http://purl.org/dc/terms#</oslc:namespaceURI>
      </oslc:NamepaceDefintion>
   </oslc:namespaceDefinition>

   <oslc:namespaceDefinition>
      <oslc:NamepaceDefintion>
         <oslc:prefix>oslc</oslc:prefix>
         <oslc:namespaceURI>http://open-services.net/xmlns/oslc#</oslc:namespaceURI>
      </oslc:NamepaceDefintion>
   </oslc:namespaceDefinition>

   <oslc:namespaceDefinition>
      <oslc:NamepaceDefintion>
         <oslc:prefix>oslc_blog</oslc:prefix>
         <oslc:namespaceURI>http://open-services.net/xmlns/bogus/blogs#</oslc:namespaceURI>
      </oslc:NamepaceDefintion>
   </oslc:namespaceDefinition>

   <oslc:service>
      <oslc:Service>
         <oslc:domain>http://example.com/xmlns/example-cm#</oslc:domain>

         <oslc:creationFactory>
            <oslc:CreationFactory>
               <dc:title>Location for creation of Blog Entries</dc:title>
               <oslc:label>Blog Entries</oslc:label>
               <oslc:creation rdf:resource="http://example.com/creation/entries" />
               <oslc:shape rdf:resource="http://example.com/shapes/blogentry" />
            </oslc:CreationFactory>
         </oslc:creationFactory>

         <oslc:creationFactory>
            <oslc:CreationFactory>
               <dc:title>Location for creation of Blog Comments</dc:title>
               <oslc:label>Blog Comments</oslc:label>
               <oslc:creation rdf:resource="http://example.com/creation/comments" />
               <oslc:shape rdf:resource="http://example.com/shapes/blogcomment" />
            </oslc:CreationFactory>
         </oslc:creationFactory>

         <oslc:queryCapability>
            <oslc:QueryCapability>
               <dc:title>Blog Entry and Comment Query</dc:title>
               <oslc:label>blogquery</oslc:label>
               <oslc:queryBase rdf:resource="http://example.com/query" />
               <oslc:shape rdf:resource="http://example.com/shapes/blogquery" />
            </oslc:QueryCapability>
         </oslc:queryCapability>

      </oslc:Service>
   </oslc:service>

</oslc:ServiceProvider>

Query Resource

Below is an example query resource, one which would be returned by the below query on our

Click HERE to see RDF/XML validation results, triples and RDF graph. 

<oslc_blog:BlogQuery
     rdf:about="http://example.com/query;"
     xmlns:oslc_blog="http://open-services.net/xmlns/bogus/blogs#"
     xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:dc="http://purl.org/dc/terms#"
     xmlns:oslc="http://open-services.net/xmlns/oslc#">

    <oslc:responseInfo>
        <oslc:ResponseInfo>
            <dc:title>Blog Service Query Results for term [remote]</dc:title>
            <oslc:self rdf:resource="http://example.com/query?oslc.from [...] entry/42&gt;" />
        </oslc:ResponseInfo>
    </oslc:responseInfo>

    <oslc_blog:comment rdf:resource="http://example.com/blogs/comment/346" />
    <oslc_blog:comment rdf:resource="http://example.com/blogs/comment/344" />
    <oslc_blog:comment rdf:resource="http://example.com/blogs/comment/673" />
    <oslc_blog:comment rdf:resource="http://example.com/blogs/comment/232" />
    <oslc_blog:comment rdf:resource="http://example.com/blogs/comment/333" />

    <!-- etc. etc. -->

</oslc_blog:BlogQuery>
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Topic revision: r1 - 07 May 2010 - 16:35:41 - ScottBosworth
Main.OslcCoreSpecDRAFTRDFXMLRepresentationExamples moved from Main.OSLCCoreSpecDRAFTRDFXMLRepresentationExamples on 07 May 2010 - 16:35 by ScottBosworth - put it back
 
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