Comment: Sequencing in CAF specification

["Tony Fletcher" <tony_fletcher@btopenworld.com>]

Title: Message

Dear Colleagues,

 

 The Coordination Framework (CF) specification seems to specify a number of procedures that involve the sending and receiving of more that one message.   In these cases the sequencing of messages can be important.  For CF and Context the sequencing may, in fact, be relatively straightforward, but unless it is clearly specified that remains uncertain.  I suspect that in several cases the allowed sequencing is not trivial, even if it is not that complex.

 

The current specification of CF only seems to have diagrams that show the message set and their directions, not their sequencing.  The WSDL fragments only show input messages (and not what can be sent out).  So they do not even show what messages are responses to what messages, let alone sequencing (which can not currently be expressed in WSDL).  WS-Context does have some start charts, but could probably be improved.

 

I therefore suggest that state tables or state charts are added to CF (and WS-Context checked to ensure its sequencing specification is crystal clear.

 

Best Regards,

Tony                          

	Tony Fletcher Technical Advisor Choreology Ltd. 68, Lombard Street, London EC3V 9L J   UK
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