--- a/ontology/components/Event.ttl	Mon Feb 27 14:47:32 2012 +0100
+++ b/ontology/components/Event.ttl	Mon Feb 27 21:37:22 2012 -0500
@@ -32,3 +32,15 @@
    a owl:Class;
    rdfs:subClassOf time:Instant;
 .
+
+prov:follows
+   a owl:ObjectProperty;
+   rdfs:domain prov:Event;
+   rdfs:range prov:Event;
+.
+
+prov:precedes
+   a owl:ObjectProperty;
+   rdfs:domain prov:Event;
+   rdfs:range prov:Event;
+.