A virtual XML database engine for relational databases

While XML is emerging as the universal format for publishing and exchanging data on the Web, most business data is still stored and maintained in relational DBMSs. To enable eBusiness database applications, Web access to the legacy data managed by DBMSs needs to be provided. In this paper, we introduce a virtual XML database engine VXE-R which allows users query a relational database via XML as if they were accessing XML documents. Algorithms for schema transformation and query translation in VXE-R are presented.