Szukana fraza: [Abstrakt = "One of the serious difficulties we meet using the Internet is the trustworthiness of found information. With regard to this there is a request for a method of Internet\-based information evaluation especially for software agents. In the paper the author described an ontology\-oriented approach of information trustworthiness evaluation. The author showed the ontology as a semantic method of knowledge representation. Afterwards the usefulness of the ontology\-oriented approach in creation of Internet\-based information evaluation systems was proven."]