Historically NCI Thesaurus has been published in the OWL 1 format.  Within the next few months EVS will switch to the current w3 standard OWL format known as OWL2 (https://www.w3.org/OWL/).  

Changes:
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Most data type specifications have been removed.

owl 1
<P108 rdf:datatype="http://www.w3.org/2001/XMLSchema#string">Blood</P108>

owl 2
<P108>Blood</P108>

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Annotation properties with a rdfs:Range of owl:DataRange have now been adjusted to now have a rdfs:Range of a separate resource of rdfs:Datatype

owl 1
<owl:AnnotationProperty rdf:about="http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#P106”>
    <rdfs:range>
      <owl:DataRange>
        <owl:oneOf rdf:parseType="Resource">
          <rdf:first rdf:datatype="http://www.w3.org/2001/XMLSchema#string"
          >Acquired Abnormality</rdf:first>



owl 2
<owl:AnnotationProperty rdf:about="http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#P106">
<rdfs:range rdf:resource="http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#Semantic_Type-enum"/>

…
…
<rdfs:Datatype rdf:about="http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#Semantic_Type-enum">
     <owl:equivalentClass>
          <rdfs:Datatype>
                <owl:oneOf>
                    <rdf:Description>
                        <rdf:type rdf:resource="http://www.w3.org/1999/02/22-rdf-syntax-ns#List"/>
                        <rdf:first>Acquired Abnormality</rdf:first>
                        



________________
  Associations have changed from owl:ObjectProperty with rdf:type owl:AnnotationProperty to owl:AnnotationProperty with rdfs:Range of anyURI

owl 1
   <owl:ObjectProperty rdf:about="#A8">
        <rdf:type rdf:resource="http://www.w3.org/2002/07/owl#AnnotationProperty"/>

owl 2
   <owl:AnnotationProperty rdf:about="#A8">
       <rdfs:range rdf:resource="http://www.w3.org/2001/XMLSchema#anyURI"/>


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Embedded XML Qualifiers have become annotations on annotations. The properties being annotated are no longer specified as rdf:parseType=“Literal”

owl 1
     <P90 rdf:parseType="Literal"><ncicp:ComplexTerm><ncicp:term-name>BLOOD</ncicp:term-name><ncicp:term-group>PT</ncicp:term-group><ncicp:term-source>CDISC</ncicp:term-source></ncicp:ComplexTerm></P90>

owl 2
     <P90>BLOOD</P90>
  </owl:Class>
     <owl:Axiom>
        <owl:annotatedSource rdf:resource="http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#C12434"/>
        <owl:annotatedProperty rdf:resource="http://ncicb.nci.nih.gov/xml/owl/EVS/Thesaurus.owl#P90"/>
        <owl:annotatedTarget>BLOOD</owl:annotatedTarget>
        <P383>PT</P383>
        <P384>CDISC</P384>
    </owl:Axiom>


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