Changed PlanForActivity to be called Plan and created PlanForActivity as a subclass.

@@ -341,7 +341,7 @@ userfield:hasFreeFieldForSpecifiedUserField
   rdfs:subClassOf [
       rdf:type owl:Restriction ;
       :shouldUseRef "true"^^xsd:boolean ;
-      owl:onClass :PlanForActivity ;
+      owl:onClass :Plan ;
       owl:onProperty :forPlan ;
       owl:qualifiedCardinality "1"^^xsd:nonNegativeInteger ;
     ] ;
@@ -847,7 +847,7 @@ userfield:hasFreeFieldForSpecifiedUserField
   rdfs:subClassOf :Period ;
   rdfs:subClassOf <http://data.posccaesar.org/rdl/RDS380969> ;
 .
-:PlanForActivity
+:Plan
   rdf:type owl:Class ;
   :shouldHaveID "true"^^xsd:boolean ;
   rdfs:comment """A ClassOfActivity that is a specification of what is to be done. A Plan consists of Activities, usually represented as a diagram or list of steps used to achieve an Objective
@@ -858,6 +858,13 @@ NOTE 2  An activity plan can define a number of part activities which are relate
   rdfs:label " Plan for Activity"^^xsd:string ;
   rdfs:subClassOf owl:Thing ;
   rdfs:subClassOf [
+      rdf:type owl:Class ;
+      owl:unionOf (
+          :WorkOrder
+          :PlanForActivity
+        ) ;
+    ] ;
+  rdfs:subClassOf [
       rdf:type owl:Restriction ;
       owl:maxQualifiedCardinality "1"^^xsd:nonNegativeInteger ;
       owl:onClass :PlanLevel ;
@@ -942,6 +949,11 @@ NOTE 2  An activity plan can define a number of part activities which are relate
       owl:onProperty :hasActivity ;
     ] ;
 .
+:PlanForActivity
+  rdf:type owl:Class ;
+  rdfs:label "Regular plan for activity"^^xsd:string ;
+  rdfs:subClassOf :Plan ;
+.
 :PlanLevel
   rdf:type owl:Class ;
   rdfs:comment "A Thing that classifies Activity Plans according to their level in the planning hierarchy."^^xsd:string ;
@@ -1076,7 +1088,7 @@ NOTE 2  An activity plan can define a number of part activities which are relate
   rdfs:subClassOf [
       rdf:type owl:Restriction ;
       owl:minQualifiedCardinality "0"^^xsd:nonNegativeInteger ;
-      owl:onClass :PlanForActivity ;
+      owl:onClass :Plan ;
       owl:onProperty :hasPlan ;
     ] ;
   rdfs:subClassOf [
@@ -1661,7 +1673,7 @@ NOTE 2  An activity plan can define a number of part activities which are relate
 :WorkOrder
   rdf:type owl:Class ;
   rdfs:comment "An Plan for Activity that corresponds to a set of Operations with a description of the work content of the Operations."^^xsd:string ;
-  rdfs:subClassOf :PlanForActivity ;
+  rdfs:subClassOf :Plan ;
   rdfs:subClassOf [
       rdf:type owl:Restriction ;
       owl:minQualifiedCardinality "0"^^xsd:nonNegativeInteger ;