7. A computer program product for processing a first query, the computer program product comprising: a computer-readable tangible storage device; first program instructions to receive a first query expressed in a first query language other than XML database schema and relational database schema, the first query language including classes and properties; second program instructions, responsive to the receipt of the first query, to determine that an XML database includes a class and a property that correspond to a class and a property of the first query, translate the first query to an XML database schema of the XML database, and initiate search of the XML database for data responsive to the query translated to the XML database schema; and third program instructions, responsive to the receipt of the first query, to determine that a relational database includes a class and a property that correspond to the class and the property of the first query, translate the first query to a relational database schema of the relational database, and initiate search of the relational database for additional data responsive to the query translated to the relational database schema; and wherein the first, second and third program instructions are stored on the computer-readable tangible storage device.
8. The computer program product of claim 7 wherein: the second program instructions translate the first query to the XML database schema by translating the first query to a name of the XML database schema and associated concept and concept path.