Towards the Adaptive Semantic Web Peter Dolog Nicola Henze Wolfgang Nejdl Michael Sintek.

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Presentation transcript:

Towards the Adaptive Semantic Web Peter Dolog Nicola Henze Wolfgang Nejdl Michael Sintek

Towards the Adaptive Semantic Web: Goal Formalize personalization techniques from Adaptive Hypermedia Re-usable formalism Applicable for Semantic Web Operate on Logic-Layer of Semantic Web Tower Formalism to employ personalization techniques in Semantic Web Rules (Triple) RDF – annotated resources Reasoning on distributed resources, powered by personalization rules and RDF-annotations

From Adaptive Hypermedia to Adaptive Web Semantic Web --> open world Adaptive Hypermedia: „closed world“ Emerging Standards: RDF / RDF-S DAML+OIL / OWL Commonly-agreed schema e.g. for domain e- learning? Approaches LOM, SCORM, etc. --> Allow mapping and comparision of resources, metadata, and ontology concepts, as well as user profile information

Approach Logic-based approach Rules describe personalization techniques Rules describe interpretation of user profile information Rules reason over RDF annotations Several ontologies: Document-, Domain, Concept-, User-Ontology plus DC/LOM-Standard Open issues Incomplete information Further elaboration of mappings

DOCS: Document Space: A finite set of first order logic (FOL) sentences with constant symbols for describing documents (and knowledge concepts), and predicates for defining relations between these (and other) constant symbols. UM: User Model: A finite set of FOL sentences with constant symbols for describing individual users (user groups), and user characteristics, as well as predicates and formulas for expressing whether a characteristic applies to a user. OBS: Observations: A finite set of FOL sentences with constant symbols for describing observations, and predicates for relating users, documents / concepts, and observations. AC:Adaptation Component: A finite set of FOL sentences with formulas for describing adaptive functionality. Logic-Based Definition of AEHS An Adaptive Educational Hypermedia System is a Quadrupel (DOCS, UM, OBS, AC)

Facts about a document

Part of Concept Ontology for Java e-Lecture

Draft of Architecture