**2.1 Semantic cache query processing criteria**

Previous surveys (Bashir M. F. and Qadir M. A., 2006a), (Ahmad, M and Qadir, M.A., 2008), (Jónsson B. Þór et al., 2006), (Hao X et al., 2005), (Halevy, A.Y., 2001), (Makki K. S and Andrei S, 2009) conducted over semantic cache query processing identified two main parameters for evaluation i.e. Maximum Data Retrieval (MDR) and fast query processing. Quantification of the MDR was not given in those surveys. Here we quantify it with the test, data from server (**Ds**) intersection data from cache (**Dc**) should be empty set i.e. **Ds ∩ Dc = Φ.**  In general any technique which retrieves maximum possible or complete results from local cache in tractable time with this given quantification is said to be an efficient semantic cache query processing technique.
