I was reading a paper about Query Expansion ( http://search.fub.it/claudio/pdf/CSUR-2012.pdf) and it said: "For instance, Google Enterprise, MySQL and Lucene provide the user with an AQE facility that can be turned on or off."
I searched through the Lucene 4.1.0 source code, which is what I have downloaded, and through Lucene forums and the web generally looking for references to query expansion in Lucene, and what I found was some discussion of the SynonymFilter class and external projects called LucQE and LuceneQE. Is there other code in Lucene that supports query expansion that I missed (because I didn't expand the queries I was searching with enough or something :-) or are these the primary Lucene and Lucene-compatible components that support query expansion? Thanks, Mike
