Profile contract

uml.usecase@1

Actors, use-case ellipses, associations, include/extend/generalization.

graph projectionUse-case diagram subset

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Primary palette

uml.actoruml.usecase

Relationship roles

uml.extenduml.generalizationuml.includeuml.uses

Legal endpoints

Relation	Source roles	Target roles	Self relation
`uml.extend`	uml.usecase	uml.usecase	Not allowed
`uml.generalization`	uml.actor, uml.usecase	uml.actor, uml.usecase	Not allowed
`uml.include`	uml.usecase	uml.usecase	Not allowed
`uml.uses`	uml.actor	uml.usecase	Not allowed

Profile verification

Actor/use-case endpoint roles remain distinct. Include and generalization graphs are acyclic.
Version 1 provides the simple actor/use-case diagram; do not require version-2 subject/extension-point metadata merely to sketch it.

Profile defaults

Explicit file settings override eligible CSS, then these profile defaults and the common standard apply. Unspecified semantic facts remain unspecified.

{
  "projection.kind": "graph",
  "projection.profile": "uml.usecase@1"
}

Projection properties

kind, profile, inputs, analysis_budget, traces, iso, depth

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Design operations

Create actor/use case; connect participation/include/extend/generalization; edit author labels.

Bounded analysis

Structural verification and display only; no execution or implied process engine.

Outside this profile

extension-point model
full UML behavior semantics