--- a/ontology/ProvenanceOntology.owl	Tue Jul 10 18:38:19 2012 -0400
+++ b/ontology/ProvenanceOntology.owl	Tue Jul 10 18:40:57 2012 -0400
@@ -1163,7 +1163,7 @@
         <category>expanded</category>
         <component>entities-activities</component>
         <editorialNote xml:lang="en">It is the intent that the property chain holds: (prov:qualifiedGeneration o prov:atTime) rdfs:subPropertyOf prov:generatedAtTime.</editorialNote>
-        <rdfs:comment xml:lang="en">The time at which an entity was completely created.</rdfs:comment>
+        <rdfs:comment xml:lang="en">The time at which an entity was completely created and is available for use.</rdfs:comment>
         <rdfs:range rdf:resource="&xsd;dateTime"/>
         <rdfs:isDefinedBy rdf:resource="http://www.w3.org/ns/prov#"/>
         <rdfs:domain rdf:resource="http://www.w3.org/ns/prov#Entity"/>
@@ -1179,8 +1179,8 @@
         <rdfs:label>invalidatedAtTime</rdfs:label>
         <editorialNote xml:lang="en">It is the intent that the property chain holds: (prov:qualifiedInvalidation o prov:atTime) rdfs:subPropertyOf prov:invalidatedAtTime.</editorialNote>
         <category>expanded</category>
+        <rdfs:comment xml:lang="en">The time at which an entity was invalidated (i.e., no longer usable).</rdfs:comment>
         <component>entities-activities</component>
-        <rdfs:comment xml:lang="en">The time at which an entity began to be invalidated (i.e., no longer usable).</rdfs:comment>
         <rdfs:range rdf:resource="&xsd;dateTime"/>
         <rdfs:isDefinedBy rdf:resource="http://www.w3.org/ns/prov#"/>
         <rdfs:domain rdf:resource="http://www.w3.org/ns/prov#Entity"/>

--- a/ontology/prov.ttl	Tue Jul 10 18:38:19 2012 -0400
+++ b/ontology/prov.ttl	Tue Jul 10 18:40:57 2012 -0400
@@ -586,7 +586,7 @@
 
 :generatedAtTime
     a owl:DatatypeProperty ;
-    rdfs:comment "The time at which an entity was completely created."@en ;
+    rdfs:comment "The time at which an entity was completely created and is available for use."@en ;
     rdfs:domain :Entity ;
     rdfs:isDefinedBy <http://www.w3.org/ns/prov#> ;
     rdfs:label "generatedAtTime" ;
@@ -736,7 +736,7 @@
 
 :invalidatedAtTime
     a owl:DatatypeProperty ;
-    rdfs:comment "The time at which an entity began to be invalidated (i.e., no longer usable)."@en ;
+    rdfs:comment "The time at which an entity was invalidated (i.e., no longer usable)."@en ;
     rdfs:domain :Entity ;
     rdfs:isDefinedBy <http://www.w3.org/ns/prov#> ;
     rdfs:label "invalidatedAtTime" ;