Hello all,I realize this is not exactly the answer, but you may want to try one of the new features of Luke (http://www.getopt.org/luke), namely the query result explanation.
I am new to the Lucene scene and have a few questions regarding the term boost physolophy:
Is the term boost equal to a term weight? Example: If I boost a term with 0.2 does this mean the term has a weight of 0.2 then?
If this is not the case, how is the term weight of the query calculated
then? Formula? Are there parts in it which I cannot influence? Does this formular
depend on the type of Query or is it independent. Maybe somebody can provide
a small code example?
Currently the best way to start Luke is to use Java WebStart. Then open an already existing index, go to the Search tab, enter a query (use "Update" button to see exactly what it is parsed into), press Search, and then highlight one of the results and press "Explain".
It was revealing for me to see how weights, boosts, normalizations etc. are applied "under the hood" so to speak, especially for Fuzzy or Phrase queries.
After experimenting a little, you may want to consult the classes in org.apache.lucene.search (e.g. Scorer and Similarity) to see the gory details.
-- Best regards, Andrzej Bialecki
------------------------------------------------- Software Architect, System Integration Specialist CEN/ISSS EC Workshop, ECIMF project chair EU FP6 E-Commerce Expert/Evaluator ------------------------------------------------- FreeBSD developer (http://www.freebsd.org)
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