Hello group, I would like to implement Relevance Feedback functionality for my system. >From the privious discussion in this group I know that this is not implemented in Lucene.
We all know that Relevance Feedback has two fields, which are 1) Term Reweighting 2) Query Expansion I am interesting in doing both of it. My first thought was that Term Reweighting can be solved with term boosing and expansion, well, with basically generation a new query. Looking close to one of the classic term reweighting formula's (Rocchio) however reveals that I need access to the term vector of the relevant as well as the term vector of the non-relevant documents. Bringing this to Lucenen it would mean, that I need to have the score of each term in the relevant and non-relevant documents to process the reweigthing formula. Coming back to Lucene, this would mean that I need to extract Documents from the Hits object after the search. From this Documents I would need to get all terms and its scores. However, Lucene does not provide this. Only Documents can be retrieved and its scores. It does not provide access to its terms and therefore no access to Term scores. Does somebody have ideas of workaround for Term Reweighting and Query Expansion withouth using the way over Hits. Does somebody have produces workarounds and can provide it to me? Thank you very much in advance, Karl -- +++ GMX - die erste Adresse für Mail, Message, More +++ Bis 31.1.: TopMail + Digicam für nur 29 EUR http://www.gmx.net/topmail --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
