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From "Karl Koch" <>
Subject Re: Term weighting and Term boost
Date Fri, 16 Jan 2004 12:51:28 GMT

Hello and thank you for this link. I think this is a very usefull tool to
analyse Lucene internals.

> I realize this is not exactly the answer, but you may want to try one of 
> the new features of Luke (, namely the query 
> result explanation.

When I start it according to the description on your web site and select the
index directory I get an error message "current threat no owner"...

What does it mean and what do I wrong?

Kind Regards,

> 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 
> (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 (
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