Re: Re: Non-determinism in Statecharts



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From: Kinika Tasie-Amadi (kinika@yahoo.com)
Date: Tue 21 Sep 2004 - 16:55:46 BST


The UML standard (v1.5) states on page 2-169 that
"Actions on transitions are executed in their given
order."

 --- Les Munday <baldrick@ureach.com> wrote: 
> 
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> ---- On Sun, 19 Sep 2004, Kinika Tasie-Amadi
> (kinika@yahoo.com)
> wrote:
> 
> >  --- Andreia Melo <andreia@det.ua.pt> wrote: 
> > > Dear all,
> > > 
> > > Is it possible to specify non-determinism in
> > > Statecharts?
> > 
> > yes it is, if non-determinism is with respect to
> the
> > sequence of actions that a transition performs in
> > response to a particular event from a particular
> > state.
> > 
> This sounds like a very clumsy way to indicate
> non-determinism.
> If I have a transition from state A to state B which
> causes the
> execution of several actions, I do not want to draw
> several
> transitions from A -> B indicating the various
> combinations of
> execution. (In this situation it is really
> unfeasible if the
> transition causes more than 2 actions to occur,
> anyway.)
> 
> My answer would be, that the order in which the
> actions are
> listed is irrelavent. Any action could be executed
> first. 
> 
> This raises the question: 'How do I indicate an
> ordered sequence
> of actions on a transition?'
> 
> Les. 
> 
> 
> 
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