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Subject: Re: [soa-rm-ra] Service description bits
Ken, What I have been asking for when I keep mentioning "gap analysis" is that what we are missing in SOA is a decent service consumer description, so that consumers who all have their own individual requirements can, in a way similar to publishing a wsdl, publish their requirements to make the initial selection of services or "pre-qualified services" possible. Right now the onus is on the consumer to make choices amongst the bewildering, and often under-specified, service providers and while what we have is far ahead of what we had a few years ago, with developments like Ajax in combined server-side and client-side processing, we are always back-filling against innovations that get a head start on us. So what I am looking at is perhaps tasking the W3C with developing the consumer-side equivalent of WSDL, and that is why I asked about the W3C Choreography effort, since that is where I would start nibbling at the ankles of the problem. Just FYI in general, I am bringing this up because I need it in both the Emergency Management and Health Informatics arenas, and Medical Banking, too. Of course, I don't have the personal bandwidth to pursue this the way it deserves. Cheers, Rex At 6:37 PM -0400 10/9/06, Ken Laskey wrote: >I've taken responsibility for service description and will hopefully >get to revising shortly. But in case that shortly slips, here are >some key thoughts for advance discussion. > >- Description is very important both for the consumer and the >provider. This includes abilities, protocols, formats, policies, >... and differences need to be resolved to establish an execution >context. This is alluded to in the RM but not explored. I will >probably expand on that here. > >- All interactions with a service must be based on informations >contained in or referenced by the service description or by further >information established during an interaction initiated solely on >the basis of the service description. The consumer may know more >(there is no way to guarantee a limit on knowledge) but SOA would >say the additional information should not be used. If this >additional information is critical (or just very useful), it should >somehow be included in the service description. > >- The description must somewhere convey technical assumptions, i.e. >the world is like this and that is why you can expect real world >effects as described. > >- Is sufficiency of description that which would support automated >use, assuming the contained information can be unambiguously >included, understood, and used? > >Ken > > >------------------------------------------------------------------------------------------ > >Ken Laskey > >MITRE Corporation, M/S H305 phone: 703-983-7934 > >7515 Colshire Drive fax: 703-983-1379 > >McLean VA 22102-7508 > > > >Attachment converted: Macintosh HD:smime 273.p7s ( / ) (00195E6D) -- Rex Brooks President, CEO Starbourne Communications Design GeoAddress: 1361-A Addison Berkeley, CA 94702 Tel: 510-849-2309
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