July 2004
Intermediate to advanced
752 pages
35h 59m
English
A notational convenience in which an area of a lifeline may be bracketed to indicate that the order of events in that area is unconstrained.
A coregion is equivalent to a parallel construct in which each event on a lifeline belongs to a separate concurrent region of the parallel construct.
A coregion is indicated by a matched pair of square brackets on a lifeline, with the coregion being the section of the lifeline between the concave sides of the brackets. Events within the bracketed region may occur in any order, even though they are ordered along the line itself
Figure 14-104 shows a referee and two players. The referee notifies both players to get ready. Each player must acknowledge with a ready message. ...
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