Facilitating Busines Interoperability from the Semantic Web

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

Contents
Introduction
Proposal
Ontological framework
Integration framework
Conclusions
Future Work

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

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

Contents
Introduction
Proposal
Conclusions
Future Work

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)

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

Contents
Introduction
Proposal
Conclusions
Future Work

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

ReDeFer XSD2OWL Mappings:
owl:intersectionOf owl:unionOf sequence choice owl:maxCardinality owl:minCardinality @maxOccurs @minOccurs rdfs:subClassOf extension@base|restriction@base owl:Restriction complexType//element owl:Class complexType|group|attributeGroup rdfs:range [email_address] rdfs:subPropertyOf [email_address] rdf:Property owl:DatatypeProperty owl:ObjectProperty element|attribute OWL XML Schema

ebXML BP classes
Hierarchy from XSD complex types and extension relations

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)

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

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

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

Contents
Introduction
Proposal
Conclusions
Future Work

Integration Framework
Load Ontological 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

ebXML BP to ebXML CPA mappings
cppa:location cppa:Role cppa:type cppa:mimetype cppa:RoleType cppa:ProcessSpecificationType cppa:Start cppa:ProcessSpecification cppa:value cppa:name cppa:uri cppa:action cppa:authenticated cppa:ProcessSpecification ... ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡ ≡  ≡  ebbp:location ebbp:Role ebbp:type ebbp:mimeType ebbp:RoleType ebbp:ProcessSpecificationType ebbp:Start ebbp:ProcessSpecification ebbp:value ebbp:name ebbp:uri ebbp:BusinessAction ebbp:isAuthenticated Specification ...

ebXML BP to BPEL-WS mappings
bpel:expression bpel:expressionLanguage bpel:name bpel:pattern bpel:variable bpel:condition bpel:partnerRole ... ≡ ≡ ≡ ≡ ≡  ≡ ebbp:expression ebbp:expressionLanguage ebbp:name ebbp:pattern ebbp:Variable ebbp:PreCondition ebbp:BusinessPartnerRole ...

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

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
PREFIX ebbp: <http://rhizomik.net/ontologies/2006/06/ebbp-2.0.3.owl#> SELECT ?r WHERE (?r <rdf:type> ebbp:SignalEnvelopeType)

Contents
Introduction
Proposal
Conclusions
Future Work

Conclusions

Conclusions
XSD2OWL take 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

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,…)

Contents
Introduction
Proposal
Conclusions
Future Work

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
…

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

Facilitating Busines Interoperability from the Semantic Web

by rogargon on May 08, 2007

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Facilitating Busines Interoperability from the Semantic Web — Presentation Transcript