OnToKnowledge: building blocks for the Semantic Web

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On-To-Knowledgebuilding blocks for the Semantic
Web

• Frank van Harmelen
• Vrije Universiteit Amsterdam

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What is On-To-Knowledge?

• European project in EU Information Society
  Technologies Programme EU-IST-10132
• Aim innovative tools for knowledge management
• Duration 2.5 years, January 2000 - June 2002
• Total effort cost 26 personyears, 2.5 M
• EC funding 1.34 M

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OTK Partners

• Free Univ. Amsterdam (VUA, coordinator), NL
• British Telecom, UK
• Swiss Life, CH
• Aidministrator, NL
• CognIT, NO
• EnerSearch, SE
• AIFB Uni-Karlsruhe, D

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Exploiting World-Wide Information Resources

• IT, and especially Internet/WWW, have boosted
  potential for knowledge acquisition and sharing
• BUT information resources are heterogeneous,
  distributed, semi-structured, enormous in size
• HENCE need for tools for selective semantic
  (meaning-oriented) access gt On-To-Knowledge
• Move from keyword search to query answering
• Move upwards in the data-info-knowledge chain
• Vision toward the next-generation semantic
  (Tim Berners-Lee, W3C) or knowledge web

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On-To-Knowledge connections with all of you

• Ontology learning from text
• Database technology for storing meta-data
• Inference services for ontologies
• Knowledge acquisition tools methods
• B2B e-commerce applications
• Knowledge Management applications
• .

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Organisational Memory (Swisslife)
Virtual Enterprise (Enersearch)
Callcenters (BT)

• Tools
• User query access
• Semantic representation analysis
• Intranet/WWW information extraction

Methodology (Karlsruhe)
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RDF Ferret
User
RQL
OntoEdit
Spectacle
OIL-Core
Sesame
Annotated Data Repository
RDF
RDF
OntoExtract
OntoWrapper
Data Repository (external)
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Ontology Language OIL

• Combine usability of frame-languages
• with formality of description logic
• and syntax of W3C standards
• Now superceded by DAMLOIL
• jointly with DARPA DAML programme
• prominent candidate for W3C standard

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Building block for the Semantic Web
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Building blocks for the Semantic Web

• Where do the meta-data come from?
• Extract them from text OntoExtract
• What to do with the meta-data?
• Store and query Sesame
• What to use the meta-data for?
• browse navigate

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Ontology-based visualisation
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Building blocks for the Semantic Web

• Where do the meta-data come from?
• Extract them from text OntoExtract
• What to do with the meta-data?
• Store and query Sesame
• What to use the meta-data for?
• browse navigate