Research and implementation of automatic question answering system based on ontology

Aiming at the problems in extant automatic question answering system, such as inadequate knowledge expression and weakness of indicating the inherent relations among knowledge, a solution with using Ontology to build curriculum domain knowledge base was put forward in this paper. In this paper, the course of "Natural Language Processing" was took as an example to construct an automatic question answering system based on Ontology. The system extracts keywords by analyzing users\´ question and transforms the intention of the question into the query of basic elements in Ontology. Finally, the system extracts the answer via Jena reasoning. Meanwhile, the system provides related knowledge to help students study systematically. This paper has achieved an automatic question answering system presented in the course of “Natural Language Processing”. This automatic question answering system supports asking questions in natural language and has some reference value in other areas.