METHOD FOR USING DUAL INDICES TO SUPPORT QUERY EXPANSION, RELEVANCE/NON-RELEVANCE MODELS, BLIND/RELEVANCE FEEDBACK AND AN INTELLIGENT SEARCH INTERFACE

摘要

A method for using dual indices to support query expansion, relevance/non-relevance models, blind/relevance feedback and an intelligent search interface, comprising using a computing device (89) to: access (101) an inverted index (103) to obtain an initial retrieval of results in response to a query, and to generate a rank list of the results, the results referring to information units (IUs) where the query occurs; and determine (105) a number of “N” IUs in the results that are assumed to be relevant by accessing a forward index (104); wherein the forward index (104) and inverted index (103) have pointers to locations in the IUs where terms of the query occur, and the forward index (104) retrieves a term frequency vector of the IU or a set of contexts of the IU.