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symbol in sequence diagram comparison table

Subject	have syntax	have optional part	become	be part of	has definition	contain in	represent	attach to	draw as	have part
activation box					A box on a lifeline in a sequence diagram indicating the period of time during which an object is actively performing work		an object performing computations		a rectangle
iteration expression				sequence diagram	An expression in an interaction diagram, used to indicate the set of objects (shown as a multiobject) to which a message will be sent	square brackets	the same message being sent to several objects of the same class
lifeline			an activation box during the period of time that the object is performing computations		A dashed line in a sequence diagram indicating the period of time during which an object exists			each object or actor in a sequence diagram	a vertical dashed line
message in sequence diagram	response:=message(arg,...)	an argument list and a response							an arrow from actor to object, , or from object to object	label

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