16. The computer readable storage medium according to claim 7 , wherein the abstract query, the first data source specific query and the second data source specific query additionally specify at least one of a measure and an attribute.
16. The computer readable storage medium according to claim 7 , wherein the abstract query, the first data source specific query and the second data source specific query additionally specify at least one of a measure and an attribute. 17. The computer readable storage medium according to claim 16 , wherein the results additionally include results for at least one of the measure and the attribute.