Ontology

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Ontology

2007-3-23

l       Definition

n         explicit formal specification of a conceptualization, intended for sharing among different applications and expressed in a language

u       formal: machine readable

u       conceptualization: semantic

u       sharing: goal

l       Language

n         OWL: developed from DAML+OIL

n         Logic base: DL

n         Language base:RDF

l       Construct

n         Tool

n         Methodology

n         Maintenance

l       Application

n         Semantic web :semantic annotation ,used for searching

n         Information integration: ontology mapping, transform information to ontology, theoretical and empirical basis

n         knowledge management : knowledge representation, query

n         Semantic web service : semantic web + web service

l        Mapping

n         algorithm :syntactic, semantic ,machine learning , top-level ontology

n         tools: semi-automatically

n         Schema mapping: similar

l       Summary

n         Language and mapping techniques are base

n         Integration and merging are methods

n         Search and data access are goals

n         Direction:

u       find good methods and build good tools in the ontology domain

u       use these tools to facilitate other research