|Incoming flows of a decision node [message #516884]
||Thu, 25 February 2010 13:11
Registered: December 2009
According to the UML specification UML Superstructure Specification, v2.2 (12.3.22, p360):|
 A decision node has one or two incoming edges and at least one outgoing edge.
Hence, there is nothing in the specification that prevents the situations :
- a control node has two incoming control flow and one outgoing control flow (and no decision input flow)
- a control node has two incoming object flow and one outgoing object flow (and no decision input flow)
By reading the specification, I have the feeling that in case there is a second incoming flow it is necessarily the decision input flow. Moreover, the constraints on the decision input behavior (, , ) describe all cases but these two.
Do you think that these situations make sense or is there a constraint missing in the UML specification ?
Thanks in advance for your answers.
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