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Abstract Class UML 2.4.1::Namespace

Description:

A namespace is an element in a model that contains a set of named elements that can be identified by name.

Direct Superclasses: NamedElement

Direct Subclasses: Transition, StructuredActivityNode, State, Region, Package, InteractionOperand, Classifier, BehavioralFeature

Class Precedence List: Namespace, NamedElement, Element

Properties:

elementImport : ElementImport (0 *); -- source Namespace

References the ElementImports owned by the Namespace.
{composite}
Subsets: Element.ownedElement
Opposite: ElementImport.importingNamespace

importedMember : PackageableElement (0 *); -- source Namespace
member : NamedElement (0 *); -- source Namespace
ownedMember : NamedElement (0 *); -- source Namespace

A collection of NamedElements owned by the Namespace.
{composite, readonly}
Derived union with sources: (ownedRule)
Subsets: Element.ownedElement, Namespace.member
Opposite: NamedElement.namespace

ownedRule : Constraint (0 *); -- source Namespace
packageImport : PackageImport (0 *); -- source Namespace
clientDependency : Dependency (0 *); -- source NamedElement
name : String (0 1); -- source NamedElement
nameExpression : StringExpression (0 1); -- source NamedElement
namespace : Namespace (0 1); -- source NamedElement
qualifiedName : String (0 1); -- source NamedElement
visibility : VisibilityKind (0 1); -- source NamedElement

Determines where the NamedElement appears within different Namespaces within the overall model, and its accessibility.

ownedComment : Comment (0 *); -- source Element
ownedElement : Element (0 *); -- source Element
owner : Element (0 1); -- source Element

Constraints:

Signature: members_distinguishable() : Boolean;
Description: All the members of a Namespace are distinguishable within it.
Expression: membersAreDistinguishable()

Operations:

Signature: membersAreDistinguishable() : Boolean;
Description: The Boolean query membersAreDistinguishable() determines whether all of the namespace's members are distinguishable within it.
Expression: result = self.member->forAll( memb | self.member->excluding(memb)->forAll(other | memb.isDistinguishableFrom(other, self)))

Signature: importedMember.1() : PackageableElement;
Description: The importedMember property is derived from the ElementImports and the PackageImports. References the PackageableElements that are members of this Namespace as a result of either PackageImports or ElementImports.
The OCL used here is not normative.
Editor's notes: Needs investigation.
Expression: Set{}
Original: result = self.importMembers(self.elementImport.importedElement.asSet()- >union(self.packageImport.importedPackage->collect(p | p.visibleMembers())))

Signature: importMembers(imps : PackageableElement; ) : PackageableElement;
Description: The query importMembers() defines which of a set of PackageableElements are actually imported into the namespace. This excludes hidden ones, i.e., those which have names that conflict with names of owned members, and also excludes elements which would have the same name when imported.
The OCL used here is not normative.
Editor's notes: Needs examination.
Expression: Set{}
Original: result = self.excludeCollisions(imps)->select(imp | self.ownedMember->forAll(mem | mem.imp.isDistinguishableFrom(mem, self)))

Signature: getNamesOfMember(element : NamedElement; ) : String;
Description: The query getNamesOfMember() gives a set of all of the names that a member would have in a Namespace. In general a member can have multiple names in a Namespace if it is imported more than once with different aliases. The query takes account of importing. It gives back the set of names that an element would have in an importing namespace, either because it is owned, or if not owned then imported individually, or if not individually then from a package. The query getNamesOfMember() takes importing into account. It gives back the set of names that an element would have in an importing namespace, either because it is owned, or if not owned then imported individually, or if not individually then from a package.
The OCL used here is not normative.
Editor's notes: includes not include
Expression: result = if self.ownedMember ->includes(element) then Set{}->includes(element.name) else let elementImports: ElementImport = self.elementImport->select(ei | ei.importedElement = element) in if elementImports->notEmpty() then elementImports->collect(el | el.getName()) else self.packageImport->select(pi | pi.importedPackage.visibleMembers()->includes(element))-> collect(pi | pi.importedPackage.getNamesOfMember(element)) endif endif
Original: result = if self.ownedMember ->includes(element) then Set{}->include(element.name) else let elementImports: ElementImport = self.elementImport->select(ei | ei.importedElement = element) in if elementImports->notEmpty() then elementImports->collect(el | el.getName()) else self.packageImport->select(pi | pi.importedPackage.visibleMembers()->includes(element))-> collect(pi | pi.importedPackage.getNamesOfMember(element)) endif endif

Signature: excludeCollisions(imps : PackageableElement; ) : PackageableElement;
Description: The query excludeCollisions() excludes from a set of PackageableElements any that would not be distinguishable from each other in this namespace.
Expression: result = imps->reject(imp1 | imps.exists(imp2 | not imp1.isDistinguishableFrom(imp2, self)))



Send questions or comments to xmi-interop@omg.org.