added new property to support the objects of field definitions

@@ -529,8 +529,8 @@
   rdfs:subClassOf [
       rdf:type owl:Restriction ;
       :shouldUseRef "true"^^xsd:boolean ;
-      owl:onDataRange :CompletelyFreeFieldDefinition ;
-      owl:onProperty :hasFieldName ;
+      owl:onClass :CompletelyFreeFieldDefinition ;
+      owl:onProperty :hasFieldReference ;
       owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
     ] ;
   rdfs:subClassOf [
@@ -2758,6 +2758,10 @@ NOTE 2  A Plan for Activity can define a number of part activities which are rel
   rdfs:comment "A property that gives the (data) field name associated with a planning object."^^xsd:string ;
   rdfs:label "has Field Name"^^xsd:string ;
 .
+:hasFieldReference
+  rdf:type owl:ObjectProperty ;
+  rdfs:label "has field reference"^^xsd:string ;
+.
 :hasFieldValue
   rdf:type owl:DatatypeProperty ;
   rdfs:comment "A property that gives the (data) field value associated with a planning object."^^xsd:string ;