Abstract
Ontologies play an important role in solving the problem of semantic heterogeneity of heterogeneous data sources. The ontology acquisition from the relational database is one of the fundamental technologies on the information integration field. Ontology acquisition from relational database (OARDB) and transformation rules used are presented and discussed. The key technologies and model are given.
Highlights
Ontologies play an important role in solving the problem of semantic heterogeneity of heterogeneous data sources
With the development of Semantic Web research, people have realized that the success of Semantic Web depends on the proliferation of ontologies and pay more attention to the construction of ontologies
The process of acquiring ontologies can be divided into two stages: Extracting Relational Database Schema Information and Acquiring Ontology
Summary
In order to acquire ontologies from relational databases, the paper makes the assumption: The relational database schema is normalized, at least up to third normal form. The third normal form is the most common normal form in relational database schema. If some databases might not be well normalized, it is possible to automate the process of finding functional dependencies within data and to algorithmically transform a relational database schema to third normal form
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