--- a/ontology/ProvenanceOntology.owl	Mon Mar 19 16:51:30 2012 +0000
+++ b/ontology/ProvenanceOntology.owl	Mon Mar 19 17:26:08 2012 +0000
@@ -182,6 +182,18 @@
     
 
 
+    <!-- http://www.w3.org/ns/prov#hadGeneration -->
+
+    <owl:ObjectProperty rdf:about="&prov;hadGeneration">
+        <rdfs:comment xml:lang="en">The generation involving the generated entity and activity.</rdfs:comment>
+        <prov:category>qualified</prov:category>
+        <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Derivation"/>
+        <rdfs:domain rdf:resource="&prov;Derivation"/>
+        <rdfs:range rdf:resource="&prov;Generation"/>
+    </owl:ObjectProperty>
+    
+
+
     <!-- http://www.w3.org/ns/prov#hadLocation -->
 
     <owl:ObjectProperty rdf:about="&prov;hadLocation">
@@ -230,6 +242,7 @@
 
     <owl:ObjectProperty rdf:about="&prov;hadQuoted">
         <prov:category>qualified</prov:category>
+        <rdfs:comment xml:lang="en">The agent who attributed to the original entity.</rdfs:comment>
         <rdfs:subPropertyOf rdf:resource="&owl;topObjectProperty"/>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Quotation"/>
         <rdfs:range rdf:resource="&prov;Agent"/>
@@ -242,6 +255,7 @@
 
     <owl:ObjectProperty rdf:about="&prov;hadQuoter">
         <prov:category>qualified</prov:category>
+        <rdfs:comment xml:lang="en">The agent who is doing the quoting.</rdfs:comment>
         <rdfs:subPropertyOf rdf:resource="&owl;topObjectProperty"/>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Quotation"/>
         <rdfs:range rdf:resource="&prov;Agent"/>
@@ -263,6 +277,18 @@
     
 
 
+    <!-- http://www.w3.org/ns/prov#hadUsage -->
+
+    <owl:ObjectProperty rdf:about="&prov;hadUsage">
+        <rdfs:comment xml:lang="en">The usage involving the used entity and activity.</rdfs:comment>
+        <prov:category>qualified</prov:category>
+        <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Derivation"/>
+        <rdfs:domain rdf:resource="&prov;Derivation"/>
+        <rdfs:range rdf:resource="&prov;Usage"/>
+    </owl:ObjectProperty>
+    
+
+
     <!-- http://www.w3.org/ns/prov#hasAnnotation -->
 
     <owl:ObjectProperty rdf:about="&prov;hasAnnotation">
@@ -472,6 +498,7 @@
 
     <owl:ObjectProperty rdf:about="&prov;responsibleForActivity">
         <prov:category>qualified</prov:category>
+        <rdfs:comment xml:lang="en">An activity for which the responsibility chain holds.</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Derivation"/>
         <rdfs:range rdf:resource="&prov;Activity"/>
         <rdfs:domain rdf:resource="&prov;Responsibility"/>
@@ -566,6 +593,7 @@
     <!-- http://www.w3.org/ns/prov#wasDerivedBy -->
 
     <owl:ObjectProperty rdf:about="&prov;wasDerivedBy">
+        <rdfs:comment xml:lang="en">The activity generating the derived entity and using the derived-from entity.</rdfs:comment>
         <prov:category>qualified</prov:category>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Derivation"/>
         <rdfs:range rdf:resource="&prov;Activity"/>