--- a/ontology/ProvenanceOntology.owl	Tue Mar 13 12:38:17 2012 -0400
+++ b/ontology/ProvenanceOntology.owl	Tue Mar 13 12:39:30 2012 -0400
@@ -796,7 +796,7 @@
     <owl:Class rdf:about="&prov;Bundle">
         <rdfs:subClassOf rdf:resource="&prov;Entity"/>
         <rdfs:comment xml:lang="en">A prov:Bundle is a group of PROV statements.</rdfs:comment>
-        <prov:category>simple</prov:category>
+        <prov:category>additional</prov:category>
         <rdfs:comment xml:lang="en">prov:Bundles are best modeled using sd:NamedGraphs.</rdfs:comment>
         <rdfs:seeAlso rdf:resource="http://www.w3.org/2011/prov/wiki/ProvRDF#Bundle"/>
     </owl:Class>