--- a/ontology/ProvenanceOntology.owl	Fri Mar 16 09:58:08 2012 -0400
+++ b/ontology/ProvenanceOntology.owl	Fri Mar 16 10:14:18 2012 -0400
@@ -564,7 +564,7 @@
     <!-- http://www.w3.org/ns/prov#wasEndedBy -->
 
     <owl:ObjectProperty rdf:about="&prov;wasEndedBy">
-        <prov:category>simple</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Ending"/>
         <rdfs:domain rdf:resource="&prov;Activity"/>
         <prov:qualifiedForm rdf:resource="&prov;End"/>
@@ -640,7 +640,7 @@
     <!-- http://www.w3.org/ns/prov#wasStartedBy -->
 
     <owl:ObjectProperty rdf:about="&prov;wasStartedBy">
-        <prov:category>simple</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Starting"/>
         <rdfs:domain rdf:resource="&prov;Activity"/>
         <prov:qualifiedForm rdf:resource="&prov;Start"/>
@@ -921,7 +921,7 @@
 
     <owl:Class rdf:about="&prov;Organization">
         <rdfs:subClassOf rdf:resource="&prov;Agent"/>
-        <prov:category>simple</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Organization"/>
     </owl:Class>
     
@@ -931,7 +931,7 @@
 
     <owl:Class rdf:about="&prov;Person">
         <rdfs:subClassOf rdf:resource="&prov;Agent"/>
-        <prov:category>simple</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Person"/>
     </owl:Class>
     
@@ -996,7 +996,7 @@
 
     <owl:Class rdf:about="&prov;SoftwareAgent">
         <rdfs:subClassOf rdf:resource="&prov;Agent"/>
-        <prov:category>simple</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#SoftwareAgent"/>
     </owl:Class>