Glossary

Abbreviation: A dictionary entry that introduces a shorthand for a concept that can already be described using words from the same dictionary.

See also Correspondence rule.
Absolute cardinality property: The absolute cardinality of an entity type is a set of natural numbers that indicates how many instances of the type can exist at the same time.
Abstraction: Omission of detail from a description. The opposite of Refinement.
Action: Each event is an action when viewed from the initiator of the event.
Activity chart: Statemate alternative for data flow diagrams.
Activity diagram: UML notation to represent flow of control. We use activity diagrams to represent workflow.
Activity state: A statechart or activity diagram state in which the described behavior is performing an ongoing activity. Every superstate is an activity state.

See also Wait state.
Actor: An entity in the environment that can cause actions in the environment when so triggered by the output response of the system.
Actuator: An actor device.
Allocation table: A table that shows which SuD components play a role in the provision of a SuD service.
And-component: Collection of closely coupled components that broadcast information to one another. Each closely coupled component has access to the same communication channels as the other components.
And-state: Statechart concept. State of a behavior that has substates. If the behavior is in an and-state, it is in all of its children states simultaneously.

See also Or-state.
Architectural style: A set of constraints on an architecture. Each architectural style...

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Design Methods for Reactive Systems: Yourdon, Statemate, and the UML

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