--- a/ontology/ProvenanceOntology.owl	Mon Mar 05 17:27:31 2012 -0500
+++ b/ontology/ProvenanceOntology.owl	Mon Mar 05 19:09:41 2012 -0500
@@ -541,12 +541,6 @@
     <owl:Class rdf:about="&prov;Activity">
         <rdfs:subClassOf rdf:resource="&prov;Durable"/>
         <rdfs:subClassOf rdf:resource="&prov;Element"/>
-        <rdfs:subClassOf>
-            <owl:Restriction>
-                <owl:onProperty rdf:resource="&prov;startedAt"/>
-                <owl:cardinality rdf:datatype="&xsd;nonNegativeInteger">1</owl:cardinality>
-            </owl:Restriction>
-        </rdfs:subClassOf>
         <owl:disjointWith rdf:resource="&prov;Entity"/>
         <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"/>