13. The computer program product of claim 11 , wherein computer executable program code for analyzing the corpus to deduce a set of possible stemming schema further comprises: computer executable program code for identifying a best stemming schema for each kernel in the set of possible stemming schema, wherein the best stemming schema is a schema with a highest schema score for the each kernel.
11. A computer program product for unsupervised stemming schema learning and lexicon acquisition from corpora, the computer program product comprising a computer usable recordable medium having computer executable program code tangibly embodied thereon, the computer executable program code comprising; computer executable program code for obtaining a corpus from a corpora; computer executable program code for analyzing the corpus to deduce a set of possible stemming schema, wherein the computer executable program code for analyzing the corpus to deduce the set of possible stemming schema further comprises: computer executable program code for generating a first affix count in concepts, wherein each of the concepts is a word unique in the corpus; computer executable program code for generating a second affix count in schemas, wherein each of the schemas contains a transformation from a first affix to a second affix for the word; and computer executable program code for generating a schema score for the each of the schemas from a combination of the first affix count and the second affix count for the possible stemming schemas to identify useful stemming schemas comprising: computer executable program code for identifying a first number of occurrences of the first affix in the corpus for each kernel size; computer executable program code for identifying a second number of occurrences of the second affix in the corpus for the each kernel size; computer executable program code for identifying a third number of occurrences of the each kernel size in the corpus; and computer executable program code for dividing a lesser of the first number of occurrences and the second number of occurrences by the third number of occurrences to form the schema score; computer executable program code for reviewing and revising the set of possible stemming schema to create a pruned set of stemming schema; and computer executable program code for deducing a lexicon from the corpus using the pruned set of stemming schema.