40. The computer-readable non-transitory storage medium of claim 31 , wherein to determine the one or more misalignments of the aligned item data pair, the program instructions are configured to, for at least one of said misalignments, determine that a word of said sequence of text strings from the textual description of said particular item does not match another word of the other sequence of text strings from the textual description of the given item.
41. The computer-readable non-transitory storage medium of claim 40 , wherein the program instructions are configured to, for the at least one misalignment, determine that said word, and said other word, match words of a predetermined set of words, and assign a subscore to said at least one misalignment based on said predetermined set of words.