Added id to FreeFieldSet

@@ -883,12 +883,19 @@
 .
 :FreeFieldSet
   rdf:type owl:Class ;
+  :shouldHaveID "true"^^xsd:boolean ;
   rdfs:comment "A Data Field that is a collection of Free Fields."^^xsd:string ;
   rdfs:label "Free Field Set"^^xsd:string ;
   rdfs:subClassOf owl:Thing ;
   rdfs:subClassOf [
       rdf:type owl:Restriction ;
       owl:minQualifiedCardinality "0"^^xsd:nonNegativeInteger ;
+      owl:onClass :ExternalReference ;
+      owl:onProperty :hasExternalReference ;
+    ] ;
+  rdfs:subClassOf [
+      rdf:type owl:Restriction ;
+      owl:minQualifiedCardinality "0"^^xsd:nonNegativeInteger ;
       owl:onClass :FreeField ;
       owl:onProperty :hasFreeField ;
     ] ;