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摘要:
In order to resolve the issue of containing query with a node set formed by multi-keywords, this paper proposes an index structure, named PS-Tree, and applies it to a semantic search engine. The PS-Tree refers to a set attribute index of object-orient database. It can map user's query to a semantic path which contains semantic relations as the aim of user's query in form of multi-keywords by 'range query'. It can improve the performance of index structure. The experiment result shows that the PS-Tree gives a good performance especially when there is a long semantic distance between the query keywords.
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来源 :
Journal of Beijing University of Technology
ISSN: 0254-0037
年份: 2012
期: 9
卷: 38
页码: 1353-1358
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