Indexing of a focused data set through a comparison technique method and apparatus

摘要

A method and system to gauge effectiveness of deals in a shopping environment are disclosed. In one aspect, a method of a server device includes identifying a special offering data of a mark-up language site when identification data of the mark-up language site is matched with a deal marker data, comparing the special offering data with a parameter of a known offering data to determine a substantial match between the special offering data and the known offering data and periodically indexing the special offering data when the special offering data has a distinctive competitive advantage when compared with the known offering data. The deal marker data may be automatically populated through an algorithm that compares each offering on the mark-up language site with a market value of the each offering, such that the deal marker data is an identifier data associated with the special offering data having a selling price lower than a threshold value from the known offering data.