--- a/ontology/ProvenanceOntology.owl	Wed Oct 26 12:01:31 2011 +0100
+++ b/ontology/ProvenanceOntology.owl	Wed Oct 26 12:07:22 2011 +0100
@@ -397,6 +397,77 @@
     </owl:ObjectProperty>
     
 
+    <!-- http://www.w3.org/ns/prov-o/wasExpandedAt -->
+
+    <owl:ObjectProperty rdf:about="wasExpandedAt">
+        <rdf:type rdf:resource="&owl;AsymmetricProperty"/>
+        <rdf:type rdf:resource="&owl;FunctionalProperty"/>
+        <rdf:type rdf:resource="&owl;IrreflexiveProperty"/>
+        <rdfs:comment xml:lang="en">The collection was extended at the given key.</rdfs:comment>
+        <rdfs:domain rdf:resource="ExpandedCollection"/>
+        <rdfs:subPropertyOf rdf:resource="wasDerivedFrom"/>
+    </owl:ObjectProperty>
+    
+
+
+    <!-- http://www.w3.org/ns/prov-o/wasExpandedBy -->
+
+    <owl:ObjectProperty rdf:about="wasExpandedBy">
+        <rdf:type rdf:resource="&owl;AsymmetricProperty"/>
+        <rdf:type rdf:resource="&owl;FunctionalProperty"/>
+        <rdf:type rdf:resource="&owl;IrreflexiveProperty"/>
+        <rdfs:domain rdf:resource="ExpandedCollection"/>
+        <rdfs:subPropertyOf rdf:resource="wasDerivedFrom"/>
+    </owl:ObjectProperty>
+    
+
+
+    <!-- http://www.w3.org/ns/prov-o/wasExpandedFrom -->
+
+    <owl:ObjectProperty rdf:about="wasExpandedFrom">
+        <rdf:type rdf:resource="&owl;AsymmetricProperty"/>
+        <rdf:type rdf:resource="&owl;FunctionalProperty"/>
+        <rdf:type rdf:resource="&owl;IrreflexiveProperty"/>
+        <rdfs:range rdf:resource="Collection"/>
+        <rdfs:domain rdf:resource="ExpandedCollection"/>
+        <rdfs:subPropertyOf rdf:resource="wasDerivedFrom"/>
+    </owl:ObjectProperty>
+    
+
+
+    <!-- http://www.w3.org/ns/prov-o/wasReducedAt -->
+
+    <owl:ObjectProperty rdf:about="wasReducedAt">
+        <rdf:type rdf:resource="&owl;AsymmetricProperty"/>
+        <rdf:type rdf:resource="&owl;FunctionalProperty"/>
+        <rdf:type rdf:resource="&owl;IrreflexiveProperty"/>
+        <rdfs:domain rdf:resource="ReducedCollection"/>
+        <rdfs:subPropertyOf rdf:resource="wasDerivedFrom"/>
+    </owl:ObjectProperty>
+    
+
+
+    <!-- http://www.w3.org/ns/prov-o/wasReducedBy -->
+
+    <owl:ObjectProperty rdf:about="wasReducedBy">
+        <rdf:type rdf:resource="&owl;AsymmetricProperty"/>
+        <rdf:type rdf:resource="&owl;FunctionalProperty"/>
+        <rdf:type rdf:resource="&owl;IrreflexiveProperty"/>
+        <rdfs:domain rdf:resource="ReducedCollection"/>
+        <rdfs:subPropertyOf rdf:resource="wasDerivedFrom"/>
+    </owl:ObjectProperty>
+    
+
+
+    <!-- http://www.w3.org/ns/prov-o/wasReducedFrom -->
+
+    <owl:ObjectProperty rdf:about="wasReducedFrom">
+        <rdf:type rdf:resource="&owl;AsymmetricProperty"/>
+        <rdf:type rdf:resource="&owl;FunctionalProperty"/>
+        <rdf:type rdf:resource="&owl;IrreflexiveProperty"/>
+        <rdfs:domain rdf:resource="ReducedCollection"/>
+        <rdfs:subPropertyOf rdf:resource="wasDerivedFrom"/>
+    </owl:ObjectProperty>
 
     <!-- 
     ///////////////////////////////////////////////////////////////////////////////////////
@@ -549,6 +620,39 @@
     <owl:Class rdf:about="Role">
         <rdfs:label xml:lang="en">Role</rdfs:label>
     </owl:Class>
+
+    <!-- http://www.w3.org/ns/prov-o/Collection -->
+
+    <owl:Class rdf:about="Collection">
+        <rdfs:label xml:lang="en">Collection</rdfs:label>
+        <rdfs:subClassOf rdf:resource="Entity"/>
+    </owl:Class>
+    
+
+
+    <!-- http://www.w3.org/ns/prov-o/EmptyCollection -->
+
+    <owl:Class rdf:about="EmptyCollection">
+        <rdfs:subClassOf rdf:resource="Collection"/>
+    </owl:Class>
+    
+
+
+
+
+    <!-- http://www.w3.org/ns/prov-o/ExpandedCollection -->
+
+    <owl:Class rdf:about="ExpandedCollection">
+        <rdfs:subClassOf rdf:resource="Collection"/>
+    </owl:Class>
+    
+
+
+    <!-- http://www.w3.org/ns/prov-o/ReducedCollection -->
+
+    <owl:Class rdf:about="ReducedCollection">
+        <rdfs:subClassOf rdf:resource="Collection"/>
+    </owl:Class>
     
 
 
@@ -583,6 +687,7 @@
     <!-- http://www.w3.org/TR/prov-o/ -->
 
     <owl:Thing rdf:about="http://www.w3.org/TR/prov-o/"/>
+
 </rdf:RDF>