Based On Ontological Semantic Retrieval Technology

Semantic retrieval is the retrieval technique that combines information retrievalwith artificial intelligence and natural language.It analyzes the retrieval requests ofusers and information objects from the understanding of semantic content.It is theretrieval matching mechanism based on concept and its correlative relationship.Ontology has the well-formed architecture of concepts and it supports logicreasoning,so the semantics retrieval based on ontology can effectively improve recalland precision ratio of the information retrieval.This paper firstly studies the concept of ontology, the theory of Description Logicand the toolkit for ontology.It maks a deep research on the the restriction ofsemantic reasoning under Open World Assumption and the function under ClosedWorld Assumption., and advances the reasoning mechanism combining CWA withOWA .Then with the help of Jena toolkit this paper implements the ABox reasoningunder CWA through SPARQL.Secondly, having studied the knowledge involved in the current semanticretrieval,such as fundamental theory, key techniques,implementation method, andconsidering the practical application,this paper proposes that using the mechanismmentioned above with the ontology toolkits to construct the semantic retrivalsystem.Then it depicts the design idea and retrieval process of this system indetail.Based on that we finally setup a trial retrieval system.