[Uml-devel] fork/join branch/merge difference

[Luis De la Parra Blum]

On Friday 15 November 2002 23:40, Jonathan Riddell wrote:
> Can anyone tell me the difference between a fork/join and a branch/merge
> in an activity diagram?  They seem to do just the same thing.

after a fork the two (or more) activities run in paralel.. a join waits for 
*all* incommin transitios to be there before goint to the outgoing 
transition.
a fork is a "either of" .. it has one or more incomming tranistions, and 
should have a "condition" (if a, then branch 1, if b then branch 2) but only 
one will be executed.
a merge is an "or", you get to it from one of many different incomming 
transitions, and go to the outgoing transition inmediatly. (no wait, because 
there are no others comming)

luis