12. The system of claim 11 , wherein the processing module extracts tokens from the item information and associates the tokens with name-value pairs based on the tokens.
12. The system of claim 11 , wherein the processing module extracts tokens from the item information and associates the tokens with name-value pairs based on the tokens. 13. The system of claim 12 , wherein the processing module organizes the name-value pairs according to value sets based on definition information and clusters the value sets based on the definition information to generate a plurality of groups.