[ebxml-cppa-negot] Re: BPSS Start element

[Martin W Sachs <mwsachs@us.ibm.com>]

John,

I agree.  We need the flexibility to control whether a particular binary
collaboration can be entered directly or only from a higher level binary
collaboration.  I think that my suggestion (previous posting) to assign a
specific meaning to absense of the Start element does that. Another way is
to complete the definition of preCondition so that its value can be
interpreted by a BSI or deployment tool.

Regards,
Marty

*************************************************************************************

Martin W. Sachs
IBM T. J. Watson Research Center
P. O. B. 704
Yorktown Hts, NY 10598
914-784-7287;  IBM tie line 863-7287
Notes address:  Martin W Sachs/Watson/IBM
Internet address:  mwsachs @ us.ibm.com
*************************************************************************************


                                                                                                                               
                      "John Yunker"                                                                                            
                      <john.                   To:       Martin W Sachs/Watson/IBM@IBMUS                                       
                      yunker@bleuciel.         cc:       <ebtwg-bps@lists.ebtwg.org>, <ebxml-cppa-negot@lists.oasis-open.org>, 
                      org>                      "Jean-Jacques Dubray" <jjd@eigner.com>                                         
                                               Subject:  Re: BPSS Start element                                                
                      08/09/2002 03:18                                                                                         
                      PM                                                                                                       
                                                                                                                               
                                                                                                                               



<MWS> I believe that if I want the nested collaboration to be treated as a
state machine encapsulated within the outer collaboration, I should state
my
intention by omitting a Start element from the nested collaboration.  The
transition element in the outer collaboration will take me to the
encapsulated nested collaboration at the appropriate place in the
choreography without needing a start element in the nested collaboration. I
don't find words in the BPSS spec that tell me to do that, </MWS>

Marty, yes you could do that, however I would reserve the right to place
conditions on both the transition and the nested start state.  Since I am
trying to reuse standard collaborations I will want to normalize the
conditions between the transition (those conditions dependent on the
context
of both collaborations) and the nested start state (those conditions
applicable to all uses of the nested collaboration).

For instance, I may have a transition from a quote to an order (order
encapsulated in quote) where in to start the nested transaction I need both
an approved quote and an authorized customer.  Note that the approved quote
condition is important only when the order and quote are used together
(place on transition), but the authorized customer is important for all
uses
of the nested transaction (place on nested start state).

As we build standard libraries of business transactions, this ability to
normalize will be critical.

Thanks!!!
John