--- a/ontology/ProvenanceOntology.owl	Mon Mar 05 12:55:37 2012 +0000
+++ b/ontology/ProvenanceOntology.owl	Mon Mar 05 10:30:21 2012 -0500
@@ -230,6 +230,8 @@
     <owl:ObjectProperty rdf:about="&prov;hadSpatialExtent">
         <rdf:type rdf:resource="&owl;AsymmetricProperty"/>
         <rdf:type rdf:resource="&owl;IrreflexiveProperty"/>
+        <rdfs:comment>DM: Location is an optional attribute of Entity and Activity.</rdfs:comment>
+        <rdfs:comment>This property is not functional because the many values could be at a variety of granularies (In this room, in that chair).</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Location"/>
         <rdfs:range rdf:resource="&prov;Location"/>
     </owl:ObjectProperty>
@@ -261,8 +263,6 @@
 prov:involved should not be used without also using the subproperty.
 
 Subproperties of prov:involved may also be asserted directly without being qualified.</rdfs:comment>
-        <rdfs:comment xml:lang="en">The subproperties here can be deleted without concern. For example, :element prov:qualified [ a prov:Usage ] handles the case of prov:hadQualifiedUsage . http://www.w3.org/2011/prov/track/issues/255</rdfs:comment>
-        <rdfs:comment xml:lang="en">This one property is used to associate a prov:Element (prov:Entity or prov:Activity) with an instance of any subclass of prov:Involvement, which will provide additional descriptions about the binary prov:involved relation. For example, :baking prov:used :pan, :egg; prov:wasAssociatedWith :baker; prov:generated :dirty_pan; prov:qualified [ a prov:Usage; prov:entity :egg; prov:role :ingredient], [ a prov:Association; prov:entity :baker; prov:role :leader ] .</rdfs:comment>
         <rdfs:range rdf:resource="&prov;Element"/>
         <rdfs:domain rdf:resource="&prov;Element"/>
         <rdfs:range rdf:resource="&prov;Involvement"/>
@@ -292,6 +292,15 @@
     
 
 
+    <!-- http://www.w3.org/ns/prov-o/qualified -->
+
+    <owl:ObjectProperty rdf:about="&prov;qualified">
+        <rdfs:comment>The subproperties here can be deleted without concern. For example, :element prov:qualified [ a prov:Usage ] handles the case of prov:hadQualifiedUsage . http://www.w3.org/2011/prov/track/issues/255</rdfs:comment>
+        <rdfs:comment>This one property is used to associate a prov:Element (prov:Entity or prov:Activity) with an instance of any subclass of prov:Involvement, which will provide additional descriptions about the binary prov:involved relation. For example, :baking prov:used :pan, :egg; prov:wasAssociatedWith :baker; prov:generated :dirty_pan; prov:qualified [ a prov:Usage; prov:entity :egg; prov:role :ingredient], [ a prov:Association; prov:entity :baker; prov:role :leader ] .</rdfs:comment>
+    </owl:ObjectProperty>
+    
+
+
     <!-- http://www.w3.org/ns/prov-o/specializationOf -->
 
     <owl:ObjectProperty rdf:about="&prov;specializationOf">
@@ -721,6 +730,7 @@
     <!-- http://www.w3.org/ns/prov-o/Location -->
 
     <owl:Class rdf:about="&prov;Location">
+        <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"/>
     </owl:Class>
@@ -812,6 +822,15 @@
     
 
 
+    <!-- http://www.w3.org/ns/prov-o/SoftwareAgent -->
+
+    <owl:Class rdf:about="&prov;SoftwareAgent">
+        <rdfs:subClassOf rdf:resource="&prov;Agent"/>
+        <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#SoftwareAgent"/>
+    </owl:Class>
+    
+
+
     <!-- http://www.w3.org/ns/prov-o/Source -->
 
     <owl:Class rdf:about="&prov;Source">
@@ -855,15 +874,6 @@
     
 
 
-    <!-- http://www.w3.org/ns/prov-o/System -->
-
-    <owl:Class rdf:about="&prov;System">
-        <rdfs:subClassOf rdf:resource="&prov;Agent"/>
-        <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#SoftwareAgent"/>
-    </owl:Class>
-    
-
-
     <!-- http://www.w3.org/ns/prov-o/TemporalEntity -->
 
     <owl:Class rdf:about="&prov;TemporalEntity">