- From: Sheila McIlraith <sam@ksl.Stanford.EDU>
- Date: Mon, 8 Sep 2003 22:37:59 -0700 (PDT)
- To: charlie@semantech.org
- Cc: Evren Sirin <evren@cs.umd.edu>, "www-ws@w3.org" <www-ws@w3.org>
Our DAML-S editor, which is being redesigned and rewritten to reflect updates to DAML-S, provides for the equivalent of a workflow tool to graphically compose services from the bottom up. I don't know whether this is what you're getting at, Charlie. Evren's tool, while not providing for complex compositions, does a nice job helping the user to locate services that match input/output requirements. Sheila McIlraith On Tue, 9 Sep 2003 charlie@semantech.org wrote: > > I have checked that out, thanks. To what extent can one automate such > composition process? Also it seems to me that not being able to make use of the > control constructs in the final composition is restrictive and does not take > advantage of the expressive potential of the process model. > > Charlie > > Quoting Evren Sirin <evren@cs.umd.edu>: > > > > > > > > > > Hi all, > > > The present DAML-S examples, congo and bravoair, are both built in a > > top-down > > > manner. Is it possible to build similar services in a bottom-up approach? > > I > > > envision quite some difficulty if one wants to create a composite service > > by > > > making use of the specified control constructs of the process model. > > > > > > Has anyone tried to do this? > > > > Actually, yes. We have built a DAML-S composer that guides the user to > > create composite processes in a bottom-up approach. User starts with a > > single service, presented with possible services that can be matched with > > it, filters the results according to non-functional attributes of the > > services. The resulting composite service can be executed using the WSDL > > groundings. However, GUI is data-flow oriented rather than control flow > > oriented so, as you suggest, you cannot make use of control constructs such > > as loops and conditionals. > > > > Check out http://www.mindswap.org/~evren/composer where you can find links > > to some sample service descriptions, a paper that describes the system and > > an online demo of the system. > > > > Best, > > > > Evren > > > > > ------------------------------------------------- > > > This mail sent through IMP: http://horde.org/imp/ > > > > > > > > > > > > ------------------------------------------------- > This mail sent through IMP: http://horde.org/imp/ > > ============================================================================== Sheila McIlraith, PhD Phone: 650-723-7932 Senior Research Scientist Fax: 650-725-5850 Knowledge Systems Lab Department of Computer Science Gates Sciences Building, 2A-248 http://www.ksl.stanford.edu/people/sam Stanford University E-mail: sam-at-ksl-dot-stanford-dot-edu Stanford, CA 94305-9020
Received on Tuesday, 9 September 2003 01:38:16 UTC