Added hierarchical datatype property

@@ -1287,6 +1287,12 @@
     ] ;
   rdfs:subClassOf [
       rdf:type owl:Restriction ;
+      owl:onDataRange xsd:boolean ;
+      owl:onProperty :hierarchical ;
+      owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
+    ] ;
+  rdfs:subClassOf [
+      rdf:type owl:Restriction ;
       owl:onDataRange xsd:string ;
       owl:onProperty :hasFieldName ;
       owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
@@ -4025,6 +4031,11 @@ NOTE 2  A Plan for Activity can define a number of part activities which are rel
   rdfs:comment "A property that gives the Z coordinate of a planning object."^^xsd:string ;
   rdfs:label "has z"^^xsd:string ;
 .
+:hierarchical
+  rdf:type owl:DatatypeProperty ;
+  rdfs:comment "A property that toggles a Free Field as supporting the subvalue of Tag (i.e., supporting outline codes in Safran, or not)."^^xsd:string ;
+  rdfs:label "hierarchical"^^xsd:string ;
+.
 :identifiedByLiteral
   rdf:type owl:DatatypeProperty ;
   rdfs:domain owl:Thing ;