--- a/ontology/ProvenanceOntology.owl	Mon Mar 05 20:26:40 2012 -0500
+++ b/ontology/ProvenanceOntology.owl	Mon Mar 05 20:31:07 2012 -0500
@@ -562,7 +562,7 @@
         <rdfs:subClassOf rdf:resource="&prov;Durable"/>
         <rdfs:subClassOf rdf:resource="&prov;Element"/>
         <owl:disjointWith rdf:resource="&prov;Entity"/>
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:comment xml:lang="en">Activity is defined to be &#39;an identifiable activity, which performs a piece of work.&#39;</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Activity"/>
     </owl:Class>
@@ -574,7 +574,7 @@
     <owl:Class rdf:about="&prov;ActivityInvolvement">
         <rdfs:subClassOf rdf:resource="&prov;Involvement"/>
         <owl:disjointWith rdf:resource="&prov;EntityInvolvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment xml:lang="en">An instance of prov:ActivityInvolvement is used to provide additional descriptions of a binary relation from any instance to an instance of prov:Activity.</rdfs:comment>
     </owl:Class>
     
@@ -584,7 +584,7 @@
 
     <owl:Class rdf:about="&prov;Agent">
         <rdfs:subClassOf rdf:resource="&prov;Entity"/>
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:comment xml:lang="en">An agent represents a characterized entity capable of activity.</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Agent"/>
     </owl:Class>
@@ -604,7 +604,7 @@
 
     <owl:Class rdf:about="&prov;Association">
         <rdfs:subClassOf rdf:resource="&prov;AgentInvolvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment>An instance of prov:Association provides additional descriptions about the binary prov:wasAssociatedWith relation from a prov:Activity to some prov:Agent that is responsible for it. For example, :baking prov:wasAssociatedWith :baker; prov:qualified [ a prov:Association; prov:entity :baker; :foo :bar ].</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Agent_Association"/>
         <prov:involvementProperty rdf:resource="&prov;wasAssociatedWith"/>
@@ -616,7 +616,7 @@
 
     <owl:Class rdf:about="&prov;Attribution">
         <rdfs:subClassOf rdf:resource="&prov;AgentInvolvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment>An instance of prov:Attribution provides additional descriptions about the binary prov:wasAttributedTo relation from a prov:Entity to some prov:Agent that is responsible for it. For example, :cake prov:wasAttributedTo :baker; prov:qualified [ a prov:Attribution; prov:entity :baker; :foo :bar ].</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Attribution"/>
         <prov:involvementProperty rdf:resource="&prov;wasAttributedTo"/>
@@ -638,7 +638,7 @@
 
     <owl:Class rdf:about="&prov;Derivation">
         <rdfs:subClassOf rdf:resource="&prov;EntityInvolvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Revision"/>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Traceability"/>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#not_in_DM:_consolidated_derivation_signature"/>
@@ -669,7 +669,7 @@
     <owl:Class rdf:about="&prov;End">
         <rdfs:subClassOf rdf:resource="&prov;Association"/>
         <rdfs:subClassOf rdf:resource="&prov;InstantaneousEvent"/>
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment>An Agent ends an Activity, optionally at a particular TimeInstant.</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Ending"/>
         <prov:involvementProperty rdf:resource="&prov;wasEndedBy"/>
@@ -681,7 +681,7 @@
 
     <owl:Class rdf:about="&prov;Entity">
         <rdfs:subClassOf rdf:resource="&prov;Element"/>
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:comment xml:lang="en">An identifiable characterized entity.</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Entity"/>
     </owl:Class>
@@ -692,7 +692,7 @@
 
     <owl:Class rdf:about="&prov;EntityInvolvement">
         <rdfs:subClassOf rdf:resource="&prov;Involvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment xml:lang="en">An instance of EntityInvolvement is used to provide additional descriptions of a binary relation from any instance to an instance of Entity.</rdfs:comment>
     </owl:Class>
     
@@ -704,7 +704,7 @@
         <rdfs:subClassOf rdf:resource="&prov;ActivityInvolvement"/>
         <rdfs:subClassOf rdf:resource="&prov;InstantaneousEvent"/>
         <rdfs:subClassOf rdf:resource="&prov;Roled"/>
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:comment xml:lang="de">An instance of prov:Generation provides additional descriptions about the binary prov:wasGeneratedBy relation from a generated prov:Entity to the prov:Activity that generated it. For example, :cake prov:wasGeneratedBy :baking; prov:qualified [ a prov:Generation; prov:entity :baking; :foo :bar ].</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Generation"/>
         <prov:involvementProperty rdf:resource="&prov;wasGeneratedBy"/>
@@ -732,7 +732,7 @@
     <!-- http://www.w3.org/ns/prov#Involvement -->
 
     <owl:Class rdf:about="&prov;Involvement">
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment xml:lang="en">An instance of prov:Involvement is used to provide additional descriptions of a prov:qualifiable binary involvement. A description (via prov:Involvement) of the binary involvement implies the assertion of the binary involvement.</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Agent_Association"/>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Generation"/>
@@ -746,7 +746,7 @@
     <!-- http://www.w3.org/ns/prov#Location -->
 
     <owl:Class rdf:about="&prov;Location">
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:comment>This is wgs:SpatialThing</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Location"/>
         <rdfs:seeAlso rdf:resource="&prov;hadSpatialExtent"/>
@@ -757,7 +757,7 @@
     <!-- http://www.w3.org/ns/prov#Note -->
 
     <owl:Class rdf:about="&prov;Note">
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Note"/>
         <rdfs:seeAlso rdf:resource="&prov;hadNote"/>
     </owl:Class>
@@ -768,7 +768,7 @@
 
     <owl:Class rdf:about="&prov;Organization">
         <rdfs:subClassOf rdf:resource="&prov;Agent"/>
-        <prov:category rdf:datatype="&rdfs;Literal">additional</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Organization"/>
     </owl:Class>
     
@@ -778,7 +778,7 @@
 
     <owl:Class rdf:about="&prov;Person">
         <rdfs:subClassOf rdf:resource="&prov;Agent"/>
-        <prov:category rdf:datatype="&rdfs;Literal">additional</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Person"/>
     </owl:Class>
     
@@ -788,8 +788,8 @@
 
     <owl:Class rdf:about="&prov;Plan">
         <rdfs:subClassOf rdf:resource="&prov;Entity"/>
-        <prov:category rdf:datatype="&rdfs;Literal"></prov:category>
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category></prov:category>
+        <prov:category>core</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Agent_Association"/>
     </owl:Class>
     
@@ -799,7 +799,7 @@
 
     <owl:Class rdf:about="&prov;Quotation">
         <rdfs:subClassOf rdf:resource="&prov;EntityInvolvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">additional</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:comment xml:lang="en">TODO: Shouldn&#39;t Quotation be a subtype of Derivation (and same for the binary relations?) -Tim</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Quotation"/>
         <prov:involvementProperty rdf:resource="&prov;wasQuotedFrom"/>
@@ -811,7 +811,7 @@
 
     <owl:Class rdf:about="&prov;Responsibility">
         <rdfs:subClassOf rdf:resource="&prov;AgentInvolvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment xml:lang="en">An instance of prov:Responsibility provides additional descriptions about the binary prov:actedOnBehalfOf relation from a performing prov:Agent to some prov:Agent for whom it was performed. For example, :mixing prov:wasAssociatedWith :toddler . :toddler prov:actedOnBehalfOf :mother; prov:qualified [ a prov:Responsiblity; prov:entity :mother; :foo :bar ].</rdfs:comment>
         <rdfs:comment rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Responsibility"/>
         <prov:involvementProperty rdf:resource="&prov;actedOnBehalfOf"/>
@@ -823,7 +823,7 @@
 
     <owl:Class rdf:about="&prov;Revision">
         <rdfs:subClassOf rdf:resource="&prov;Source"/>
-        <prov:category rdf:datatype="&rdfs;Literal">additional</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Revision"/>
         <prov:involvementProperty rdf:resource="&prov;wasRevisionOf"/>
     </owl:Class>
@@ -852,7 +852,7 @@
 
     <owl:Class rdf:about="&prov;SoftwareAgent">
         <rdfs:subClassOf rdf:resource="&prov;Agent"/>
-        <prov:category rdf:datatype="&rdfs;Literal">additional</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#SoftwareAgent"/>
     </owl:Class>
     
@@ -862,7 +862,7 @@
 
     <owl:Class rdf:about="&prov;Source">
         <rdfs:subClassOf rdf:resource="&prov;Derivation"/>
-        <prov:category rdf:datatype="&rdfs;Literal">additional</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:comment rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Original_Source"/>
         <prov:involvementProperty rdf:resource="&prov;hadOriginalSource"/>
     </owl:Class>
@@ -874,7 +874,7 @@
     <owl:Class rdf:about="&prov;Start">
         <rdfs:subClassOf rdf:resource="&prov;Association"/>
         <rdfs:subClassOf rdf:resource="&prov;InstantaneousEvent"/>
-        <prov:category rdf:datatype="&rdfs;Literal">qualified</prov:category>
+        <prov:category>qualified</prov:category>
         <rdfs:comment>An Agent starts an Activity, optionally at a particular TimeInstant.</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Starting"/>
         <prov:involvementProperty rdf:resource="&prov;wasStartedBy"/>
@@ -897,7 +897,7 @@
 
     <owl:Class rdf:about="&prov;Summarization">
         <rdfs:subClassOf rdf:resource="&prov;EntityInvolvement"/>
-        <prov:category rdf:datatype="&rdfs;Literal">additional</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Summary"/>
         <prov:involvementProperty rdf:resource="&prov;wasSummaryOf"/>
     </owl:Class>
@@ -953,7 +953,7 @@
         <rdfs:subClassOf rdf:resource="&prov;EntityInvolvement"/>
         <rdfs:subClassOf rdf:resource="&prov;InstantaneousEvent"/>
         <rdfs:subClassOf rdf:resource="&prov;Roled"/>
-        <prov:category rdf:datatype="&rdfs;Literal">core</prov:category>
+        <prov:category>core</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Usage"/>
         <prov:involvementProperty rdf:resource="&prov;used"/>
     </owl:Class>