An XML fuzzy query answering approach based on domain knowledge

To deal with the problem of XML fuzzy query for common users,this paper proposes a domain knowledge-based XML data fuzzy query approach.Based on fuzzy sets theory,this paper firstly introduces the form of XML fuzzy query.And then,an approach which leverages the domain knowledge and membership function of fuzzy set to realize the fuzzy query translation of XML data,is presented.The importance of querying predicates and user preferences are taken into consideration when the fuzzy query is translated.Finally,for the fuzzy query results,the elements of them are ranked according to their satisfaction degree to the original fuzzy query.This approach can realize the fuzzy query without modifying XML query language and the XDBMS,and thus it can help users to improve their interaction with the system.Results of experiments demonstrate that the fuzzy query approach proposed in this paper has high recall ratio and precision.