Architecting and designing > UML 2.5 > Model Elements > Classifiers > Signal
  
Signal
Signals and Receptions are used to model asynchronous communication between objects. Signal is a specification of a kind of communication between objects in which a reaction is asynchronously triggered in the receiver without a reply.
The data carried by the communication are represented as attributes of the Signal.
The sender of a Signal will not block waiting for a reply but continue execution immediately. By declaring a Reception associated to a given Signal, a Classifier specifies that its instances will be able to receive that Signal, or a subtype thereof, and will respond to it with the designated Behavior.
A Signal can be parameterized, bound, and used as TemplateParameters.
See also
Activity
Actor
Association
DataType
Enumeration
Extension
FunctionBehavior
Information Item
Interaction
Interface
Opaque Behavior
Primitive Type
State Machine
Stereotype
Use Case
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