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Ontological Implications of Service-Oriented Architecture

Ontological Implications of Service-Oriented Architecture. Michael Gruninger NIST / Institute for Systems Research University of Maryland. Tasks. Service discovery Find web services that achieve F, and where if B occurs then it occurs before A.

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Ontological Implications of Service-Oriented Architecture

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  1. Ontological Implications of Service-Oriented Architecture Michael Gruninger NIST / Institute for Systems Research University of Maryland

  2. Tasks • Service discovery • Find web services that achieve F, and where if B occurs then it occurs before A. • e.g., my credit card is charged only after the book leaves the warehouse • Service composition

  3. Semantic Web Service Ontologies • Specify the semantics of the process model underlying services, together with a notion of messages and dataflow. • Axiomatize this semantics within some logical language (OWL, Common Logic) • Existing ontologies • OWL-S • SWSF (Semantc Web Services Framework) • WSMO (Web Service Modelling Ontology)

  4. SWSF • FLOWS-core • Service, AtomicProcess, composedOf, message, channel • Control Constraints • Split, Sequence, Unordered, Choice, IfThenElse, Iterate, RepeatUntil • Ordering Constraints • OrderedActivity • Occurrence Constraints • OccActivity • State Constraints • TriggeredActivity • Exception Constraints • Exception

  5. Ontologies for Semantic Web Services • The software applications within services will typically be using different ontologies, and any service-oriented architecture must support the semantic integration of these ontologies • Required Capabilities • Advertise/publish application ontologies • Automatically generate semantic mappings between ontologies used by different services. • Twenty Questions Semantic Mapping Tool and Process Information Exchange protocols

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