Martínez Usero, José ÁngelBeltrán Orenes, María Pilar2023-06-202023-06-202005-11https://hdl.handle.net/20.500.14352/54057A philosophical and technical approach of the concept of ontology is introduced and the importance of ontologies to structure, manage and retrieve the knowledge of different scientific fields and various political and social contexts is enhanced. The tools related to ontology management and the languages used for ontology creation are revised. In particular, an identification of the web-based ontology mark-up languages that contribute to knowledge representation and organization in this electronic and hypertextual environment, such as DAML+OIL, OWL and OML, is carried out. Finally, ontologies are presented as the basis for semantic web development and as a tool to guarantee information interoperability in e-government services. In this sense, some examples of initiatives for ontology application in electronic public services are provided.spaconference paperhttp://www.irfd.org/events/wf2005open accessOntologiesKnowledge managementKnowledge representationSemantic webe-governmentRecuperación de la informaciónAdministración públicaDocumentos electrónicos5909 Administración Publica