Re: Choreography and the Semantic Web

Mark,

And there is much that SOAP/WSDL do that RDF doesn't. 

There is NOTHING that prevents one from using RDF in the context of Web 
services technologies (e.g. carrying RDF graphs in the SOAP header or 
body, 
extending WSDL with RDF, or even representing a WSDL description using
RDF), or not as one sees fit. 

What's your point?

Cheers,

Christopher Ferris
Architect, Emerging e-business Industry Architecture
email: chrisfer@us.ibm.com
phone: +1 508 234 3624

www-ws-arch-request@w3.org wrote on 08/11/2002 09:54:36 PM:

> 
> On Sun, Aug 11, 2002 at 04:28:47PM -0400, Champion, Mike wrote:
> > Uhh, you certainly can have a SOAP/WSDL web service that returns the 
current
> > temperature at some location, and have it return with a SOAP message 
that
> > says "the termperature is 33 degrees celsius."
> 
> Well sure, but my point - which you appear to be agreeing with - was 
that
> SOAP/WSDL/etc.. don't do what RDF does.
> 
> >  The difference is that the
> > SOAP/WSDL does this by reference to hard-coded semantics ... the 
designers,
> > producers, and consumers of the service "just know" what temperature,
> > degrees, celsius, etc. "mean" and this is reflected in program code
> > Presumably RDF could reference or encode an ontology that knows what 
these
> > terms mean, and they could be extended or tweaked without re-writing 
any
> > program code.
> 
> Mostly right, but which approach is taken is independant of the
> technology used to get the data there.  So whether you used HTTP GET to
> return plain old XML, SOAP/WSDL to return RDF, or some other combo, what
> you accurately describe is purely a property of the data.
> 
> As an aside, I think the reason few (if any) are considering using RDF
> with SOAP/WSDL, is that the common use of SOAP/WSDL already requires a
> priori knowledge of the specific service being used, so there's no
> benefit to a generic format over a specific one.
> 
> MB
> -- 
> Mark Baker, CTO, Idokorro Mobile (formerly Planetfred)
> Ottawa, Ontario, CANADA.               distobj@acm.org
> http://www.markbaker.ca        http://www.idokorro.com
>