schema.org

schema.org provides well structured data model for linked data. They also tried to provide the model in RDF format here, but now it's no longer maintained. Instead, TopQuadrant seems to take over the role.

TopQuadrant proposed some modifications in perspective of conventions which will be suited for many RDF/OWL tools(link). But there is one remaining problem with inverseOf property which seems to have duplicated meaning with owl:inverseOf. This may cause confusion when the reasoning is needed following 'inverseOf' relation.

One more thing may cause confusion is about supersededBy property which indicates some of the properties are not recommended to use.

Following these considerations, I revised the model again based on TopQuadrant proposed, as follows:

• replace 'schema:inverseOf' to 'owl:inverseOf'
• remove all the properties which includes 'supersededBy' restriction.
• remove two annotation properties: 'schema:inverseOf' and 'schema:supersededBy'

Additionally, errors regarding of the declarations of some of the properties as follows:

• Illegal redeclarations of some of the properties are fixed (declared as ObjectProperty and DataProperty): schema:commentTime, schema:seasonNumber, schema:startDate, schema:pageStart, schema:position, schema:query, schema:dateModified, schema:photo, schema:estimatedFlightDuration, schema:episodeNumber, schema:artEdition, schema:endDate, schema:mainEntityOfPage, schema:clipNumber, schema:dateCreated, schema:volumeNumber, schema:pageEnd, schema:issueNumber, schema:petsAllowed

<!-- before -->
<owl:ObjectProperty rdf:about="http://schema.org/commentTime">
  <rdfs:domain rdf:resource="http://schema.org/UserComments"/>
  <rdfs:range>
      <owl:Class>
          <owl:unionOf rdf:parseType="Collection">
              <rdf:Description rdf:about="http://www.w3.org/2001/XMLSchema#date"/>
              <rdf:Description rdf:about="http://www.w3.org/2001/XMLSchema#dateTime"/>
          </owl:unionOf>
      </owl:Class>
  </rdfs:range>
</owl:ObjectProperty>

<owl:DatatypeProperty rdf:about="http://schema.org/commentTime"/>

<!-- after -->
<owl:DatatypeProperty rdf:about="http://schema.org/commentTime">
  <rdfs:domain rdf:resource="http://schema.org/UserComments"/>
  <rdfs:range>
      <rdfs:Datatype>
          <owl:unionOf rdf:parseType="Collection">
              <rdf:Description rdf:about="http://www.w3.org/2001/XMLSchema#date"/>
              <rdf:Description rdf:about="http://www.w3.org/2001/XMLSchema#dateTime"/>
          </owl:unionOf>
      </rdfs:Datatype>
  </rdfs:range>
</owl:DatatypeProperty>

• schema:loanTerm is modified to follow its superProperty, schema:duration

<!-- before -->
<owl:ObjectProperty rdf:about="http://schema.org/loanTerm">
  <rdfs:domain rdf:resource="http://schema.org/LoanOrCredit"/>
  <rdfs:range rdf:resource="http://schema.org/QuantitativeValue"/>
</owl:ObjectProperty>

<owl:DatatypeProperty rdf:about="http://schema.org/loanTerm">
  <rdfs:subPropertyOf rdf:resource="http://schema.org/duration"/>
</owl:DatatypeProperty>

<!-- after -->
<owl:DatatypeProperty rdf:about="http://schema.org/loanTerm">
  <rdfs:domain rdf:resource="http://schema.org/LoanOrCredit"/>
  <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#duration"/>
  <rdfs:subPropertyOf rdf:resource="http://schema.org/duration"/>
</owl:DatatypeProperty>

• Misuses of schema:sameAs are fixed

<!-- before -->
<owl:DatatypeProperty rdf:about="http://schema.org/sameAs">
   <rdfs:domain rdf:resource="http://www.w3.org/2002/07/owl#Thing"/>
   <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#anyURI"/>
</owl:DatatypeProperty>

<!-- after -->
<owl:AnnotationProperty rdf:about="http://schema.org/sameAs">
   <rdfs:domain rdf:resource="http://www.w3.org/2002/07/owl#Thing"/>
   <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#anyURI"/>
</owl:AnnotationProperty>

License

Licensed under the terms of service documented here, which follows CC BY-SA 3.0.