Abstract: With the development of semantic Web, the RDF (resource description framework) is sharply increasing, so the RDF query problem is becoming more and more attention, and has been a hot research topic in the academia. Based on the research on existing RDF data query technology, considering the fuzziness and uncertainty characteristics of natural language expression, this paper analyzes the query method with fuzzy conditions. Then, this paper discusses the topics on RDF fuzzy query, query processing and query optimization, summarizes the RDF fuzzy query methods through the analysis and comparison of existing techniques at home and abroad in detail, and gives the advantages and disadvantages of existing methods. In addition, this paper discusses the implementation method of fuzzy RDF query with preference by using the sorting mechanism and preference degree calculation. At last, this paper gives the future challenge of RDF fuzzy query technologies.

Key words: semantic Web, RDF data, RDF fuzzy query

摘要： 随着语义Web的发展，RDF（resource description framework）数据量飞速增长，致使其查询问题日益得到关注，已成为学术界研究的热点之一。在研究现有RDF数据查询技术的基础上，考虑了自然语言表达所具有的模糊性或不确定性特点，分析了包含模糊条件的查询方法。从RDF模糊查询、查询处理、查询优化等方面，深入分析和比较了RDF模糊查询方法，给出了现存方法的优点和存在的问题。讨论了采用排序机制及偏好优先度计算的包含偏好条件的RDF模糊查询方法。最后给出了相关工作，并对RDF模糊查询技术进行了展望。

关键词: 语义Web, RDF数据, RDF模糊查询