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activation box
subjectfact 
activation boxhas definition A box on a lifeline in a sequence diagram indicating the period of time during which an object is actively performing work2001-08-30 14:54:27.0
is a subtopic of 8.1 - Interaction Diagrams2001-08-30 14:54:27.0
is drawn as a rectangle2001-08-30 14:54:27.0
is a kind of symbol in sequence diagram2001-08-30 14:54:27.0
represents an object performing computations2001-08-30 14:54:27.0