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Class UML 2.5::Extend

Description:

A relationship from an extending UseCase to an extended UseCase that specifies how and when the behavior defined in the extending UseCase can be inserted into the behavior defined in the extended UseCase.

Direct Superclasses: NamedElement, DirectedRelationship

Direct Subclasses:

Class Precedence List: Extend, NamedElement, DirectedRelationship, Relationship, Element

Properties:

condition : Constraint (0 1); -- source Extend
extendedCase : UseCase (1 1); -- source Extend
extension : UseCase (1 1); -- source Extend
extensionLocation : ExtensionPoint (1 *); -- source Extend

An ordered list of ExtensionPoints belonging to the extended UseCase, specifying where the respective behavioral fragments of the extending UseCase are to be inserted. The first fragment in the extending UseCase is associated with the first extension point in the list, the second fragment with the second point, and so on. Note that, in most practical cases, the extending UseCase has just a single behavior fragment, so that the list of ExtensionPoints is trivial.
{ordered}

clientDependency : Dependency (0 *); -- source NamedElement
name : String (0 1); -- source NamedElement

The name of the 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
source : Element (1 *); -- source DirectedRelationship
target : Element (1 *); -- source DirectedRelationship
relatedElement : Element (1 *); -- source Relationship
ownedComment : Comment (0 *); -- source Element
ownedElement : Element (0 *); -- source Element
owner : Element (0 1); -- source Element

The Element that owns this Element.
{readonly}
Derived union with sources: (namespace, extension)
Opposite: Element.ownedElement

Constraints:

No additional constraints.

Operations:

No additional operations.



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