Sequences of LCA Relation Guide Twig Queries
Yingbiao Zhou · Journal of Chinese Computer Systems · 2010
t is an important research branch on XML that RDBMS meets storage and query of XML data.DM XML system builds on RDBM,integrates structure mapping and model mapping,and realizes a path-partitioned code scheme to store XML data by path summaries.the methods of analyzing,validating and generating DM XML pattern set are proposed.Every tree pattern in the set corresponds to unique couple of LCA relation sequence among constrained nodes,which is equally translated into a SQL query.The results of experiments prove both reasonable code scheme and effective twig query.