Ontology Extraction Using Views for Semantic Web

Ontology Extraction Using Views for Semantic Web

Carlo Wouters (La Trobe University, Australia), Rajugan Rajagopalapillai (University of Technology, Sydney, Australia), Tharam S. Dillon (University of Technology, Sydney, Australia) and Wenny Rahayu (La Trobe University, Australia)
Copyright: © 2006 |Pages: 40
DOI: 10.4018/978-1-59140-905-2.ch001


The emergence of Semantic Web (SW) and the related technologies promise to make the Web a meaningful experience. Conversely, success of SW and its applications depends largely on utilization and interoperability of well-formulated ontology bases in an automated heterogeneous environment. This creates a need to investigate utilization of an (materialized) ontology view as an alternative version of an ontology. However, high level modeling, design and querying techniques still proves to be a challenging task for SW paradigm, as, unlike classical database systems, ontology view definitions and querying have to be done at high-level abstraction. In order to address such an issue, in this chapter, we describe an abstract view formalism forSW (SW-view) with conceptual and logical extensions. SW-views provides the needed conceptual and logical semantics to engineer ontology bases using three levels of abstraction, namely (1) conceptual, (2) logical/schema and (3) instance levels. We first provide the view model and it formal properties including a set of conceptual operators, which enable us to do ontology extraction at the conceptual level. Later, we provide a schemata transformation methodology to materialize SW-views under the Ontology Extraction Methodology (OEM) framework.

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