This paper convert the XMLs tree structure to meta table and propose a definition of XML metatable

structure statistics table and their generation algorithms

combined with the meta table to hold the structure of the XML structural data

designing a meta table-based querying XML compression method M TQC (MetaTable Queryable Compression)

compression and queries on XML data.Experiments show that in the meta table

queries on structure statistics table processes will become more simple

and M TQC has an excellent compression performance and query efficiency.