3. The method of claim 1 , further comprising the step of reclassifying in the computer system the document upon a failure to extract at least the subset of the group of predefined indices from the document.
3. The method of claim 1 , further comprising the step of reclassifying in the computer system the document upon a failure to extract at least the subset of the group of predefined indices from the document. 7. The method of claim 3 , wherein the step of reclassifying the document further comprises the steps of: determining a relative frequency of each of the terms in the document; identifying at least one putative index of the document based in part upon the relative frequency of each of the terms in the document; searching indices associated with the ground truth documents for occurrences of the at least one putative index; and reclassifying the document as belonging to a classification that includes at least one ground truth document that having at least one occurrence of the at least one putative index.