Class UML 2.3::Usage
Description:
A usage is a relationship in which one element requires another element
(or set of elements) for its full implementation or operation. A usage
is a dependency in which the client requires the presence of the supplier.
Direct Superclasses: DependencyDirect Subclasses: Class Precedence List: Usage,
Dependency,
PackageableElement,
ParameterableElement,
NamedElement,
DirectedRelationship,
Relationship,
ElementProperties:
![](/se-interop/image/right-arrow.png)
client :
NamedElement (1 *); -- source
Dependency The element(s) dependent on the supplier element(s). In some cases (such
as a Trace Abstraction) the assignment of direction (that is, the designation
of the client element) is at the discretion of the modeler, and is a stipulation.
Subsets: DirectedRelationship.source
Opposite: NamedElement.clientDependency
![](/se-interop/image/right-arrow.png)
supplier :
NamedElement (1 *); -- source
Dependency The element(s) independent of the client element(s), in the same respect
and the same dependency relationship. In some directed dependency relationships
(such as Refinement Abstractions), a common convention in the domain of
class-based OO software is to put the more abstract element in this role.
Despite this convention, users of UML may stipulate a sense of dependency
suitable for their domain, which makes a more abstract element dependent
on that which is more specific.
Subsets: DirectedRelationship.target
![](/se-interop/image/down-arrow.png)
visibility :
VisibilityKind (1 1); -- source
PackageableElement![](/se-interop/image/down-arrow.png)
owningTemplateParameter :
TemplateParameter (0 1); -- source
ParameterableElement![](/se-interop/image/right-arrow.png)
templateParameter :
TemplateParameter (0 1); -- source
ParameterableElement The template parameter that exposes this element as a formal parameter.
Opposite: TemplateParameter.parameteredElement
![](/se-interop/image/right-arrow.png)
clientDependency :
Dependency (0 *); -- source
NamedElement Indicates the dependencies that reference the client.
Opposite: Dependency.client
![](/se-interop/image/down-arrow.png)
name : String (0 1); -- source
NamedElement![](/se-interop/image/right-arrow.png)
nameExpression :
StringExpression (0 1); -- source
NamedElement The string expression used to define the name of this named element.
{
composite}
Subsets: Element.ownedElement
![](/se-interop/image/down-arrow.png)
namespace :
Namespace (0 1); -- source
NamedElement![](/se-interop/image/down-arrow.png)
qualifiedName : String (0 1); -- source
NamedElement![](/se-interop/image/down-arrow.png)
source :
Element (1 *); -- source
DirectedRelationship![](/se-interop/image/down-arrow.png)
target :
Element (1 *); -- source
DirectedRelationship![](/se-interop/image/down-arrow.png)
relatedElement :
Element (1 *); -- source
Relationship![](/se-interop/image/down-arrow.png)
ownedComment :
Comment (0 *); -- source
Element![](/se-interop/image/down-arrow.png)
ownedElement :
Element (0 *); -- source
Element![](/se-interop/image/down-arrow.png)
owner :
Element (0 1); -- source
ElementConstraints:
No additional constraints.
Operations:
No additional operations.
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