Use of Filter instead of fudge in productVolume transform

@@ -14,19 +14,16 @@
 transhelp:derivedFrom
       rdf:type owl:ObjectProperty .
 
-transhelp:dummyTrue
-      rdf:type owl:DatatypeProperty , owl:FunctionalProperty .
-
 transhelp:hasDerivedText
       rdf:type owl:DatatypeProperty .
 
 transhelp:intervalIdentifier
-      rdf:type owl:FunctionalProperty , owl:DatatypeProperty .
+      rdf:type owl:DatatypeProperty , owl:FunctionalProperty .
 
 transhelp:mapsTo
       rdf:type rdf:Property .
 
 transhelp:materialClassMapsToMPREnumeration
-      rdf:type owl:ObjectProperty , owl:FunctionalProperty , owl:InverseFunctionalProperty ;
+      rdf:type owl:InverseFunctionalProperty , owl:FunctionalProperty , owl:ObjectProperty ;
       rdfs:label "material class maps to MPR enumeration"^^xsd:string ;
       rdfs:subPropertyOf transhelp:mapsTo .