real life wasDerivedFrom example.
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ontology/components/wasDerivedFrom/ordnance-survey-ontology-adoption.tll Tue Oct 04 12:49:46 2011 -0400
@@ -0,0 +1,13 @@
+@prefix nfo: <http://www.semanticdesktop.org/ontologies/2007/03/22/nfo#> .
+@prefix prov: <http://dvcs.w3.org/hg/prov/raw-file/tip/ontology/ProvenanceOntology.owl#> .
+@prefix : <#> .
+
+:result
+ a prov:Entity;
+ nfo:fileURL <http://minas.cs.utep.edu/visko/ontology/esip-data.owl>;
+ prov:wasDerivedFrom :input;
+.
+:input
+ a prov:Entity;
+ nfo:fileURL <http://wiki.esipfed.org/images/d/da/Datatype.txt>;
+.