UML22 — Namespace issue (UML 1.4 formal/2002-09-67, 2.5.3.26 Namespace )

The Namespace has the following definition constraint (p. 2-64): [1] The operation contents results in a Set containing all ModelElements contained by the Namespace. contents : Set(ModelElement) contents = self.ownedElement -> union(self.namespace, contents)

The errors: 1. Syntax error in the union operation. According to Object Constraint Language Specification set has operation (p. 6-38) set->union(set2 : Set(T)) : Set(T) with the single parameter !

2. The functions contents and allContents are used to receive all composite and aggregate elements of namespace according to specification of these functions (Is that right ?). For example all overriden functions in the descedent elements (Package, DataType) release these functions in this manner. In this case function contents must be realized as: contents = self.ownedElement 3.The functions contents and allContents is sometimes used to receive list of «accessable» objects ! For example: definition constraint #2 for BehavioralFeature (p. 2-54): [2] The type of the Parameters should be included in the Namespace of the Classifier. self.parameter->forAll( p | self.owner.namespace.allContents->includes (p.type) ) Why parameter can't use imported DataType ? Why parameter can't use DataType located in the Namespace binded with the namespace of classifier by «friend» Permission ? Note that DataType may be included in the namespace of namespace of owner. It also may be included directly into owner ! I may send the collection of such errors («contents» instead of «acessable»).

Discussion: This is an issue raised against the UML 1 metamodel, which is no longer valid. Revised Text: N/A Disposition: Closed, no change