Class UML 2.3::Extend
Description:
A relationship from an extending use case to an extended use case that
specifies how and when the behavior defined in the extending use case can
be inserted into the behavior defined in the extended use case.
Direct Superclasses: NamedElement,
DirectedRelationshipDirect Subclasses: Class Precedence List: Extend,
NamedElement,
DirectedRelationship,
Relationship,
ElementProperties:
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 extension points belonging to the extended use case,
specifying where the respective behavioral fragments of the extending use
case are to be inserted. The first fragment in the extending use case 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 use case has just a single behavior fragment, so that the
list of extension points is trivial.)
{
ordered}
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 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
ElementConstraints:
Signature: extension_points() : Boolean;
Description: The extension points referenced by the extend relationship must belong
to the use case that is being extended.
Expression: extensionLocation->forAll (xp | extendedCase.extensionPoint->includes(xp))
Operations:
No additional operations.
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