Class UML 2.4.1::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: DirectedRelationship,
NamedElementDirect Subclasses: Class Precedence List: Extend,
DirectedRelationship,
Relationship,
NamedElement,
ElementProperties:
![](/se-interop/image/right-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
condition :
Constraint (0 1); -- source
ExtendReferences the condition that must hold when the first extension point
is reached for the extension to take place. If no constraint is associated
with the extend relationship, the extension is unconditional.
{
composite}
Subsets: Element.ownedElement
![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
extendedCase :
UseCase (1 1); -- source
Extend![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
extension :
UseCase (1 1); -- source
Extend![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
extensionLocation :
ExtensionPoint (1 *); -- source
Extend![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
source :
Element (1 *); -- source
DirectedRelationship![](/se-interop/image/right-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
target :
Element (1 *); -- source
DirectedRelationshipSpecifies the targets of the DirectedRelationship.
{
readonly}
Derived union with sources: (extendedCase)
Subsets: Relationship.relatedElement
![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
relatedElement :
Element (1 *); -- source
Relationship![](/se-interop/image/right-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
clientDependency :
Dependency (0 *); -- source
NamedElementIndicates the dependencies that reference the client.
Opposite: Dependency.client
![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
name : String (0 1); -- source
NamedElement![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
nameExpression :
StringExpression (0 1); -- source
NamedElement![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
namespace :
Namespace (0 1); -- source
NamedElement![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
qualifiedName : String (0 1); -- source
NamedElement![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
visibility :
VisibilityKind (0 1); -- source
NamedElement![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
ownedComment :
Comment (0 *); -- source
Element![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
ownedElement :
Element (0 *); -- source
Element![](/se-interop/image/down-arrow.png?hunchentoot-session=49239%3AFA7527223FDD1EDCD4678DCD820E4694)
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.
Send questions or comments to
[email protected].