| Abstract [eng] |
In recent years the development of ontologines- formal specifications of the terms in the domain and relations among them has been expanding from the Artificial-Intelligence laboratories to the desktops of domain experts. Ontologies have become common on the World-Wide Web. The ontologies on the Web range from large taxonomies categorizing Web sites such as on „Yahoo“ to categorizations of products for sale and their features such as on „Amazon.com“. It is a language for encoding knowledge on Web pages to make it understandable to electronic agents searching for information. An ontology defines a common vocabulary for researchers who need to share information in a domain. It includes machine interpretable definitions of basic concepts in the domain and relations among them. Encoded information, vocabulary for researchers, formal specifications of the terms and other are saved in relational databases. The aim of this research is to improve possibilities of querying ontologies when these are kept in relational databases by creating and realizating the algorithm, which allows to transform ontology from relational databases. Experiments have shown that the method works for relation databases which were created by OWL2toRDB algorithm. |
