A hybrid encoding scheme is proposed to organize and manage XML efficiently with relational database.Vectors encoding scheme is improved

and vectors gradients are utilized to identify XML nodes position information

combining with nodes path information;which supports nodes mapping and location

avoids re-encoding caused by data update

and achieves quick path query.The hybrid encoding mathematic model

data model and relational schema are established.Performance analysis and experiment results show that

the hybrid encoding scheme can support XML query

update and reconstruction well and validly.