FW: [wsbpel] [wsbpel-comment] Why is <link> acyclic?

[John Evdemon <John.Evdemon@microsoft.com>]

Forwarding to BPEL comments to preserve the thread.

> -----Original Message-----
> From: Eckenfels. Bernd [mailto:B.Eckenfels@seeburger.de]
> Sent: Wednesday, September 06, 2006 10:50 AM
> To: jassuncao@deetc.isel.ipl.pt
> Cc: wsbpel@lists.oasis-open.org
> Subject: [wsbpel] [wsbpel-comment] Why is <link> acyclic?
>
> Hallo,
>
> Just a few (inoffical) ideas/answers:
>
> In BPEL a link is not a control flow (like a goto) it is more a signalling
> relationship. Those cant be cyclic, because they are only activated once.
>
> You will have to map a cyclic BPMN to a loop construct in BPEL. Another option is
> to not allow them in your designer, because that may lead to all kind of
> confusions. In BPMN you can make a scope repeatable, thats better than modelling
> "goto loops". (we do that in our process designer also this way).
>
> Gruss
> Bernd
>
>
> > -----Original Message-----
> > From: João Luís Silva Assunção [mailto:jassuncao@deetc.isel.ipl.pt]
> > Sent: Monday, September 04, 2006 2:51 PM
> > To: wsbpel-comment@lists.oasis-open.org
> > Subject: [wsbpel-comment] Why is <link> acyclic?
> >
> > Hello all,
> > First of all,my apologies if the question is as a dumb one or in the
> > wrong place.
> >
> > I'm developing a BPMN designer that exports to BPEL as a school
> > project. Due to the cyclic nature of BPMN diagrams and the acyclic
> > nature of BPEL I had a lot of work to implement the mapping between
> > the two, and I noticed it could be a lot simpler if <link> was not
> > acyclic. What is the reason behind this restriction?
> > Thank you.
> >
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> > OASIS Web Services Business Process Execution Language (WSBPEL) TC.
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