Conceptual model
Recognize OWL, UML, XSD
(illogical) End user presentation
Simple presentation for programmer (and programs) on street
Formal foundation (meta-model)
Service (& resource?) (in)complete description
(legacy) Interface (API)
Domain or business level
Expressive power & scalability
Advertising (publishing) & Discovery
Service Discovery vs. Service location
Tooling & test-beds
Semantic integration
Data- & process+ integration
Service Composition
Contracting
QoS, SLAs, exceptions
Management
Meter & monitor
Ontology (part of the solution)
Non functionals
Upper ontology: Keep it simple
Process ontology, relationship to WS*
Domain ontologies –
Governance
mediation