I have done negative boosts, it does work; you must construct your
query terms accordingly. I found the results somewhat unintuitive -
the mixture of negative and postive boosts (mainly 1.0), TF/IDF
and document length normalization will very often make documents
more relevant that you did not expect to be.
Regards,
Karsten
Mit freundlichen Grüßen aus Saarbrücken
--
Dr.-Ing. Karsten Konrad
Head of Artificial Intelligence Lab
XtraMind Technologies GmbH
Stuhlsatzenhausweg 3
D-66123 Saarbrücken
Phone: +49 (681) 3025113
Fax: +49 (681) 3025109
konrad@xtramind.com
www.xtramind.com
-----Ursprüngliche Nachricht-----
Von: Terry Steichen [mailto:terry@net-frame.com]
Gesendet: Donnerstag, 11. September 2003 16:05
An: Lucene Users Group
Betreff: Negative boosting?
I've often found the use of query-based boosting to be very beneficial. This is particularly
so when it's easy to identify the term that I want to stand out as a primary selector.
However, I've come across quite a few other cases where it would be easier (and more logical)
to apply a negative boost - to de-emphasize the match when the term is present.
Is it possible to apply a negative boost (It doesn't seem to work), and if not, would it break
anything signficant if that were added?
Regards,
Terry
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