Class UML 2.5::Variable
Description:
A Variable is a ConnectableElement that may store values during the execution
of an Activity. Reading and writing the values of a Variable provides an
alternative means for passing data than the use of ObjectFlows. A Variable
may be owned directly by an Activity, in which case it is accessible from
anywhere within that activity, or it may be owned by a StructuredActivityNode,
in which case it is only accessible within that node.
Direct Superclasses: ConnectableElement,
MultiplicityElementDirect Subclasses: Class Precedence List: Variable,
ConnectableElement,
TypedElement,
NamedElement,
ParameterableElement,
MultiplicityElement,
ElementProperties:
activityScope :
Activity (0 1); -- source
Variable scope :
StructuredActivityNode (0 1); -- source
Variable end :
ConnectorEnd (0 *); -- source
ConnectableElement templateParameter :
ConnectableElementTemplateParameter (0 1); -- source
ConnectableElement type :
Type (0 1); -- source
TypedElement 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 owningTemplateParameter :
TemplateParameter (0 1); -- source
ParameterableElement isOrdered : Boolean (1 1); -- source
MultiplicityElement isUnique : Boolean (1 1); -- source
MultiplicityElement lower : Integer (1 1); -- source
MultiplicityElement lowerValue :
ValueSpecification (0 1); -- source
MultiplicityElementThe specification of the lower bound for this multiplicity.
{
composite}
Subsets: Element.ownedElement
upper : UnlimitedNatural (1 1); -- source
MultiplicityElement upperValue :
ValueSpecification (0 1); -- source
MultiplicityElement ownedComment :
Comment (0 *); -- source
Element ownedElement :
Element (0 *); -- source
Element owner :
Element (0 1); -- source
ElementConstraints:
No additional constraints.
Operations:
Signature: isAccessibleBy(a : Action; ) : Boolean;
Description: A Variable is accessible by Actions within its scope (the Activity or StructuredActivityNode
that owns it).
Expression: result = (if scope<>null then scope.allOwnedNodes()->includes(a) else a.containingActivity()=activityScope endif)
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