RE: Choreography: Narrowing Down the Requirements

It's about time to finalize our charter proposal.  I haven't seen much 
pushback on Jeff's scoping here.  Can we declare consensus?



> -----Original Message-----
> From: Jeff Mischkinsky [mailto:[email protected]]
> Sent: Thursday, October 31, 2002 5:34 AM
> To: [email protected]
> Subject: Choreography: Narrowing Down the Requirements
> 
> 
> 
> Hi,
>    In response to the WSCG's request that we narrow down the 
> requirements 
> before presenting our recommendation to the AC, I'd like to 
> float a trial 
> balloon. The proposal would be to insert into the previous 
> draft of the 
> proposed charter the text specified below (or something real 
> close to it). 
> In addition, along the lines of our previous discussions and 
> votes, I'd 
> suggest restricting the input documents to the one's we 
> agreed were most 
> essential. I'll post a complete draft charter before the 
> (Halloween) telecon.
> 
> The choreography specification(s) shall define (at a minimum) 
> the behavior 
> and language constructs for the following key concepts:
> 
>      * Composition features
>            o The ability to define a choregraphy as a web 
> service, i.e. a
>              recursive composition model.
>            o Definition of the choreography's externally 
> observable behavior.
>            o Ability to represent stateful choreographies.
>            o Definition of the identity of a choreography instance.
>            o Lifecycle management (e.g. creation, termination, etc.)
>      * Associations
>            o Roles based on web service use.
>            o Linkages between web services.
>            o References to web services.
>      * Message exchanges
>            o Conversations - correlated message exchanges that define
>              interactions between web services.
>            o Correlations and their life cycle management.
>            o Correlation relationships with choreography 
> instances and state.
>      * Activities
>            o Message exchange interactions between web 
> services (e.g. receive,
>              invoke, etc.).
>            o Behavior definitions (e.g. sequencing , looping, 
> concurrent
>              execution, etc.).
>            o Assignment semantics.
>            o Relationships between activities.
>            o Scoping Rules.
>            o Nesting Rules.
>      * State Management
>            o Definition, manipulation, and query capabilities
>