Ontology Evolution in Knowledge Web

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Ontology Evolution inKnowledge Web

• (Wolf Winkler)
• Digital Enterprise Research Institute
• NUI Galway, Ireland

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Overview

• Introduction to KWeb and WP Dynamics
• Deliverables related to ontology evolution
• What happened so far?
• Approach and working plan

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Knowledge Web - Realizing the Semantic Web

• Still a long way to go transfer the semantic web
  from an academic adventure into a technology
  provided by software industry.
• Supporting this transition process of ontology
  technology from academia to industry is the main
  and major goal of Knowledge Web

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Knowledge Web - Realizing the Semantic Web

• Outreach to Industry
• Outreach to Research
• Heterogeneity
• Dynamics
• SWS
• Outreach to Education

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WP 2.3 Dynamics

• Ontology Evolution and Versioning
• evolution of ontologies data driven, e.g. by
  analyzing texts and suggesting ontology
  modifications,
• usage driven, e.g. by analyzing user behavior and
  suggesting ontology modifications
• Supporting collaborative Versioning
• Find consensus
• Support collaboration
• Ontology Evaluation
• How good is the ontology?
• Meaning Negotiation
• Contract (How much to pay?)
• Alignment (What do you mean?)

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Overview

• Introduction to KWeb and WP Dynamics
• Deliverables related to ontology evolution
• What happened so far?
• Approach and working plan

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WP 2.3 Tasks

• Ontology versioning
• Methodology for ontology syntactic versioning
• Methodology for ontology semantic versioning
• Test the methodology in the real-life business
  scenarios.
• Process modelling of consensus
• Survey of current workflow technology
• Knowledge acquiring of various ways of reaching
  consensus
• Modelling the process of forming consensus.
• Patterns of ontology versioning
• Identifying the patterns of ontology versioning
  methods
• Classifying such patterns
• Managing these patterns in the library for easy
  access and reuse.
• Ontology Evaluation
• Quality assurance for ontologies?

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WP 2.3 First 18 Month Deliverables

• D 2.3.1 Specification of a methodology for
  ontology syntactic and semantic versioning
• D 2.3.2 Specification of knowledge acquisition
  and modelling of the process of the consensus

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Overview

• Introduction to KWeb and WP Dynamics
• Deliverables related to ontology evolution
• What happened so far?
• First ideas
• Approach and working plan

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What happened so far?

• KWeb-kick-off-Meeting in Madrid 2nd of
  February 2004
• WP-kick-off-Meeting in Amsterdam 2nd of March
• Current phase Brainstorming on Wiki-Page to
  state-of-the-art in ontology evolution
• Next Milestone State-of-the-art paper by end of
  June (M6)

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Overview

• Introduction to KWeb and WP Dynamics
• Deliverables related to ontology evolution
• What happened so far?
• First ideas
• Approach and working plan

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Cooperative Ontology Evolution
Common Ontology Repository
Knowledge Bases
Knowledge Bases
Ontology Engineers
Learning-Agents
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Ontology Versioning State of the Art

• Database Schema Evolution
• Object oriented, relational
• Collaborative Versioning
• CVS
• Ontologies
• Collaborative editing, change detection,
  difference algorithms, consensus building

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Ontology Versioning and Evolution Possible
Requirements

• Support for
• Backwards compatibility ensure data
  availability
• Collaborative versioning
• As language independent as possible
• Layered architecture
• Support multiple ontology language/dataformats
• Collaboration Principles
• Merging, Branching, Change and Difference
  Detection
• Consensus building

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Dream Layered Ontology Versioning System
Interaction Layer
RDF-S, DamlOil, Owl, F-Logic?
RDF
General RDF-versioning mapping to semantic
layer?
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Dream Layered Ontology Versioning System
Interaction Layer
Versioning Primitives, Change Management (CVS),
Semantics
WP 2.2 Heterogeneity, WP 2.5 Extensions
Storage Query Infrastructure Layer
WP 2.1 Scalability
Plays the same role for the Semantic Web thatCVS
has for the Open Source Community
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Michel Klein

• Phd-Thesis Change Management for Distributed
  Ontologies
• Framework for Ontology Evolution

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Overview

• Introduction to KWeb and WP Dynamics
• Deliverables related to ontology evolution
• What happened so far?
• First ideas
• Approach and working plan

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Work Plan

• 1) set of possible scenarios
• 2) deriving requirements
• 3) survey of current versioning techniques
• 4) what is missing?
• 5) what should de improved?
• 6) developing framework
• 7) developing specific methods

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Starting Points

• Work by Michel Klein
• Work by Ljiljana Stojanovic
• Work in database schema evolution
• User scenarios and use cases provided by partners

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Work Plan- timeline for next steps

• End of June
• First version of state-of-the-art-deliverable
• End of year
• D 2.3.1 Specification of a methodology for
  ontology syntactic and semantic versioning
• D 2.3.2 Specification of knowledge acquisition
  and modelling of the process of the consensus

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• Thank you for your attention!