17. The hardware computer-readable storage media of claim 15 , the acts further comprising: defining a grammar, wherein the grammar comprises a sub-set of symbols used to identify the potential matching symbols.
17. The hardware computer-readable storage media of claim 15 , the acts further comprising: defining a grammar, wherein the grammar comprises a sub-set of symbols used to identify the potential matching symbols. 18. The hardware computer-readable storage media of claim 17 , wherein the sub-set is defined based upon the dataset of confirmed user entries.