You'll hear about

• what are web services
• why describe them
• what W3C set out to do and what it did
• main structures in WSDL
• RDF mapping for WSDL
• candidate recommendation stage

Web services interaction

Thanks, Hugo!

What are Web Services?

Systems accessible over the Web

Why describe Web Services?

• Others talk to our service
• Need to know our input schema
• In fact, input schemata for our different operations
• Bonus: let them know our output schema(ta) as well

What has been done in W3C?

• 2001: W3C receives WSDL 1.1
• Clear push: rubberstamp now!
• Working group to create WSDL 1.2
• More changes necessary than originally expected
• Result: WSDL 2.0

What is WSDL?

• The input schema
• Bonus: the output schema, too
• Bonus: different messaging patterns allowed
• That's an operation
• Operations grouped in interface
• Bonus: iterface can reuse (extend) other interfaces
• Service gives interface and address (and networking binding details)
• Details are in the spec and primer

WSDL RDF mapping

• Turning WSDL documents into RDF
• Now all your WSDL data can be viewed as RDF...
• ... and combined with the rest of your RDF data
• last call for comments ends mid-July
• One small step for us, one small step for Semantic Web

Candidate Recommendation

• January 2006: WSDL 2.0 finished, ready for testing
• Building test suite - good and bad WSDL documents
• Testing on two levels
  • Parsing WSDL into component model
  • Creating messages according to WSDL
• Not such a big delta from WSDL 1.1
• Have implementations? Tell us what you can do, please.
  • We can keep it confidential
  • We are testing our spec, not your product

Summary

• WSDL 2.0 clarifies WSDL 1.1
• WSDL 2.0 documents part of the Semantic Web
• Candidate Recommendation
• WSDL 2.0 will be Recommendation as soon as we have implementation coverage
• You can help!