17. The apparatus of claim 16 , wherein the processor unit further executes the computer executable program code to process the received input stream of complex multidimensional expression queries through the trusted multidimensional expression engine to direct the apparatus to: process the received input stream of complex multidimensional expression queries through a progressive set of test cases; determine whether a query of the received input stream fails a semantic test case; responsive to a determination that the query fails the semantic test case, identify a failing test case and associated query; and responsive to a determination that the failing test case requires correction to the failing test case, update the failing test case.
16. The apparatus of claim 15 , wherein the processor unit further executes the computer executable program code to receive a trusted output from a trusted multidimensional expression engine to direct the apparatus to: receive an input stream of complex multidimensional expression queries to form a received input stream of complex multidimensional expression queries; and process the received input stream of complex multidimensional expression queries through the trusted multidimensional expression engine.