International Journal of Engineering and Technology

a great part of the existing data on the web is stored in relational databases (RDB). However, the transition from the traditional web to Semantic web requires new structuring of these data. In this context we propose a method which allows automatic extraction of data from RDB and their restructuring in the form of RDF graphs using the Jena API to make them available for the Semantic Web. This structuring is to create a model of the ontology, and to enrich it from the components of the RDB schema using different classes provided by the Jena API. Subsequently, the created model undergoes a modification using SPARQL queries. Thereafter, we proceed to a set of instantiations (individuals) of these model elements using records data of the RDB to populate the ontology. Finally, we test the preservation of the RDB semantic by interrogating the resulting ontology by SPARQL queries by analogy to querying the RDB by SQL queries.