XQuery-to-SQL translating algorithm with little dependence on schema mapping between XML and RDB

Existing XQuery-to-SQL algorithms all depend on special XML-to-RDB schema-mapping algorithm, but in the real applications, an independent method is needed because people can't ensure that the two translating algorithm come from the same industry projects and conflicts can't be avoided. Aiming at this problem, we propose an XQuery-to-SQL translating algorithm with little dependence on any schema-mapping algorithm between XML and RDB by setting up a general virtual relational schema for XML document (GVRS for short), which can be used as the bridge between XML view and its bottom relational storage. Our method separates XQuery-to-SQL algorithm from schema mapping between XML and RDB, so the conflicts can be avoided successfully.