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