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Facilitating Business Interoperability from the Semantic Web

Roberto García, Rosa Gil Universitat de Lleida, Spain. Facilitating Business Interoperability from the Semantic Web . Contents. Introduction Proposal Ontological framework Integration framework Conclusions Future Work. Contents. Introduction Proposal Ontological framework

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Facilitating Business Interoperability from the Semantic Web

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  1. Roberto García, Rosa Gil Universitat de Lleida, Spain Facilitating Business Interoperability from the Semantic Web

  2. Contents • Introduction • Proposal • Ontological framework • Integration framework • Conclusions • Future Work

  3. Contents • Introduction • Proposal • Ontological framework • Integration framework • Conclusions • Future Work

  4. Introduction • Networked Business to Business • Interoperability • Standardisation approach • Define common lingua • Usually based on an XML Schema formalisation • No one-fits-all solution • Proliferation: Biztalk, RosettaNet, ebXML, UML, BPEL… • Sofistication: domain complexity • Complexity + Heterogeneity Busines Information Systems difficult to manage and integrate

  5. Introduction • Some existing standards: • OASIS • ebXML, Electronic Business using eXtensible Markup Language • CPPA (Collaboration Protocol Profile and Agreement) • BP (Business Process) • … • BPEL-WS, Web Services Business Process Execution Language • UBL, Universal Business Language • Microsoft BizTalk • RosettaNet • … • Common aspects: non formal semantics and XML-based

  6. Contents • Introduction • Proposal • Ontological framework • Integration framework • Conclusions • Future Work

  7. Proposal • Semantic Metadata and Ontology facilitate management and integration • Semantic Approach to BIS • Related work: • The Enterprise Ontology • eCl@ss OWL (Web Ontology) • EDI Ontology (OWL) • RosettaNet Ontology (OWL)

  8. Proposal • Limitations: • Whole effort for each XML standard formalised • Break with existing XML based BIS • Lack momentum, ontological framework but no data • Alternative: • Automate XML formalisation (at least to some extent) • Keep links to existing XML based BIS • Also map existing data

  9. Contents • Introduction • Proposal • Ontological framework • Integration framework • Conclusions • Future Work

  10. Ontological Framework • ebXML, WSBPEL, UBL, RosettaNet,… • XMLSemantic Web • “XML Semantics Reuse Methodology”ReDeFer implementation • XSD2OWL: schema to ontology • XML2RDF: XML instance data to RDF instances

  11. XML Schema OWL element|attribute rdf:Property owl:DatatypeProperty owl:ObjectProperty element@substitutionGroup rdfs:subPropertyOf element@type rdfs:range complexType|group|attributeGroup owl:Class complexType//element owl:Restriction extension@base|restriction@base rdfs:subClassOf @maxOccurs @minOccurs owl:maxCardinality owl:minCardinality sequence choice owl:intersectionOf owl:unionOf Ontological Framework • ReDeFer XSD2OWLMappings:

  12. Ontological Framework • ebXML BP classes • Hierarchy from XSDcomplex types andextension relations

  13. Ontological Framework • Apply methodology to existing XML standards • ebXML • Collaboration Protocol Profile and Agreement (ebCPPA)cpp-cpa-v1_0.owl • Business Process (ebBP) ebbp-2.0.3.owl • BPEL-WS • Web Services Business Process Execution Language (WSBPEL)business-process.owl • Integrate RosettaNet Ontology (from LSDIS, Univ. of Georgia)

  14. Ontological Framework • A generic XML semantics reuse methodology • Already validated in other domains: • Multimedia: MPEG-7 ontology (W3C MMSEM XG) • Digital Rights Management: MPEG-21 ontologies (MPEG) • Newspapers: IPTC, NewsML and NITF ontologies

  15. Ontological Framework: Instances • ReDeFer XML2RDF: XML tree  RDF graph. • Deduce blank node types (i.e. XSD Complex Types) from XSD2OWL ontologies restrictions.

  16. Ontological Framework: Instances • ebXML CPP example from XML to RDF (fragment) • Includes XML tree but also XSD complex types

  17. Contents • Introduction • Proposal • Ontological framework • Integration framework • Conclusions • Future Work

  18. Integration Framework • Load Ontological Framework

  19. Integration Framework • Integrate Ontologies • OWL semantic relations for equivalence and inclusion: subClassOf, subPropertyOf, equivalentClass, equivalentProperty, sameIndividualAs, etc. • More complex mappings using Semantic Web Rules • Generate mappings: • OWL Ontology Aligner • User supervision

  20. Integration Framework • ebXML BP to ebXML CPA mappings

  21. Integration Framework • ebXML BP to BPEL-WS mappings

  22. Integration Framework

  23. Integration Framework

  24. Integration Framework • Semantics into practice • Scenario: the previous ebXML CPP example • Semantics formalised by ebXML CPPA Ontology • Semantics connected to data through references to: • Classes, and their hierarchy, for XSD complex types • Properties, and their hierarchy/restrictions, for XSD elements

  25. Integration Framework • Semantics into practice • Task: get all SignalEnvelope types • XML tools: many XQueries and aware of schema structure • Semantic tools: 1 query, unaware and support changes

  26. Contents • Introduction • Proposal • Ontological framework • Integration framework • Conclusions • Future Work

  27. Conclusions

  28. Conclusions • XSD2OWLtake profit from XML Schema hidden semantics • We formalise them when building ontologies, but also implicitly when we make XML Schemas • Ontologies from XSD • ebXML, BPEL-WS… and more to come (automatic) • First formalisation step • Hook more detailed semantics • Map to other ontologies

  29. Conclusions • XML2RDF: reuse existing XML metadata to add momentum to Semantic Web BIS • Model XML tree as graph • Enrich with links to concepts in ontologies • Facilitate implementation using Semantic Web tools (DL reasoners, rule engines, semantic queries,…)

  30. Contents • Introduction • Proposal • Ontological framework • Integration framework • Conclusions • Future Work

  31. Future Work • Map other Business XML Schemas to OWL • More detailed integration (also rules) • Advanced ontology alignment tools • Formal business ontology as hub for integration • Demonstrator: simple semantic BIS • …

  32. More at: http://rhizomik.net …/redefer (mapping tools) …/ontologies/bizontos (eBiz ontologies) Contact: {rgarcia,rgil}@diei.udl.cat Thank you for your attention

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