Legacy Issue Number: 14990
Source: NIST ( Conrad Bock)
In UML empty parameter nodes are currently given the null value when an
activity terminates. The semantics of ActivityParameterNode says: "If
some output parameter nodes are empty at that time [when the activity is
finished], they are assigned the null token, and the activity
If it is decided that the execution engine should not reflect the above
semantics, then UML needs an additional attribute on
ActivityParameterNode to indicate whether null tokens are passed out to
pins when the activity is finished executing and the activity parameter
node is empty, or whether nothing is passed out. In ExecUML this
attribute value would always be for the second option.
Reported: FUML 1.0b2 — Tue, 19 Jan 2010 05:00 GMT
Disposition: Resolved — FUML 1.0
The resolution to Issue 14550, in response to UML Issue 9863 on the output of read actions for no values, changes the fUML semantics so that the discrepancy described in this issue no longer exists.
Updated: Sat, 7 Mar 2015 08:56 GMT