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An expansion model of semantic query based on ontology is proposed for the problem of ldquoexpression differencerdquo and ldquomechanical matchrdquo that usually exists in information retrieval. By using domain knowledge in ontology, retrieval system can improve semantic understanding of retrieval documents, and give the chance to user to put their information request in more nature way (more precise...
Text similarity counting has been widely used in several fields. This paper proposes a sentence similarity based on ontology algorithm .With the study of sentence similarity, this paper improves a new sentence similarity computation method based on similarity word pair. Counting similarity between key words in the sentences through Ontology. The method makes the similarity of words level in the sentence...
This paper presents an information extraction system which can precisely extract semantic elements from texts by using OWL-based domain ontologies. In the system, each inputted text is viewed as a non-formalized instance of a domain ontology. And the outputted semantic elements extracted from the text are formalized elements composed of classes, individuals and properties. To perform the extraction,...
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