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BPMN 2 Issue: start event to exclusive gateways [message #896723]

Thu, 19 July 2012 13:49

Rui Domingues

Messages: 194
Registered: October 2010

Senior Member

Hi.

I've a doubt about the use of exclusive gateways.
I think I'm right when I say that it is possible connect a start event to an EXCLUSIVE gateway (regarding metamodel), but at that point of the execution, on what can one do a decision? At this point the decision can't be made using some input of user(human), it must be made based on process metadata or something, is it right?

My question is : In a real world application, does it make sense (to connect start event to exclusive gateway)

On the other hand, if in one application that it is not allowed, we have a metamodel violation or just some additional restriction

Thanks in advance.
Rui

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Re: BPMN 2 Issue: start event to exclusive gateways [message #896770 is a reply to message #896723]

Thu, 19 July 2012 16:28

Robert Brodt

Messages: 811
Registered: August 2010
Location: Colorado Springs, CO

Senior Member

Hi Rui,

The StartEvent may have one or more event definitions (a "trigger") that describe how the process is started (Message, Timer, Signal, etc.) The ExclusiveGateway then has access to that trigger information which can be used in the condition expression. So, yes it does make sense to allow a StartEvent to flow directly into an ExclusiveGateway.

HTH,
Bob

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