From database to semantic web ontology: an overview

This paper intends to provide an overview of automated knowledge extraction and transformation from relational databases and their related sources into Semantic Web ontologies. Issues and challenges in this area are addressed. Knowledge embedded in each part of a relational database is analysed and defined. Corresponding techniques for extracting, acquiring and transforming the knowledge are highlighted. In this paper, we classify previous approaches on this work into two types. A comparison table of the first type of approach is also given