A relational database management system having an XML storage implementation to reduce overhead associated with consuming data from multiple data providers, where each having proprietary database schemas. The XML storage solution allows data from any arbitrary relational database schema to be loaded, rearranged and retrieved. The system is adapted to receive and managing data from external content providers by exposing a predetermined provider content file formats These formats use XPath as a schema reference, as a definition of legal combinations, and as a pattern to match other XPaths.