comments on SA-WSDL working draft 28. September 2006

Hello Tomas,
here are some comments on the current SA-WSDL working draft:
 
inclusion of mapping between XML schema types and ontology concepts
  The SAWSDL specification provides only a (probably smaller) part of the necessary specifications for semantic web services. This is probably
  ok in order to make progress. On the other hand it contains a mapping between XML schema and ontology. This is a quite specific 
  part, which is not needed in every scenario where semantic web services are used. Therefore this part should be a separate specification.
  It may be even used for completely other purposes than in the context of web services.
 
 
example ontology purchaseorder
  The example ontology purchaseorder is used in the modelReferences of the SAWSDL. It is not contained in the spec and version
  accessible via http://www.w3.org/2002/ws/sawsdl/spec/ontology/purchaseorder does not contain all used classes.
 
many schema mapping technologies
  For the schema mapping all together 3 technologies are used in the examples: SPARQL, XSLT, XQuery. This is quite confusing. At least
  some more positioning - when to use what - is needed.
 
more then links
  the SAWSDL specification currently provides in its core only the definition of links to the identification of more or less arbitrary documents. 
  I would like to see at least the kind of support that xml schema has in WSDL. That means additionally an embedding of the semantic model definition
  should be defined. The major additional requirement would be that there is an XML serialization of the semantic models.
  This would allow in a standard way to transport semantic models within WSDLs.
 
listofAnyURI
  XML has several possibilities to represent ordered values.
  The encoding with atomic datatype is very special and somehow outside the XML node mechanisms.
  Is it really a good idea to use these very special list datatypes?
 

Best regards

Walter

 

 

Dr. Walter Waterfeld 
Software AG
crossvision R&D
Uhlandstraße 12 
64297 Darmstadt 
Germany 
email: Walter.Waterfeld@softwareag.com