A Fast Approach for SLCA in Keyword Query over XML Document

Query evaluation and query semantics in the XML keyword query, has an important role, which directly affect the performance of XML query. This paper proposes a fast approach for SLCA in keyword query over XML document,which can judge the information of relevant nodes by means of self-definition to document nods type.This method can solve the problems of no significance of node information query results of the XKSearch algorithm, and compared with XSeek algorithm, it has high efficiency in the query time consumed for the returned results. Experiments show that this method is more efficient in query time and quality of keywords query.