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From Paul Libbrecht <p...@activemath.org>
Subject Re: Indexing of virtual "made up" documents
Date Tue, 26 Apr 2005 20:46:49 GMT

Le 26 avr. 05, à 15:00, Erik Hatcher a écrit :
>> I am not sure how Lucenes uses the placement information, but in the
>> described case where I concatenate all my features to a
>> whitespace-delimited text, I fear that Lucene uses the placement of
>> features in this made-up text and comes to some wrong conclusions 
>> (after
>> all, the placement is arbitrary in the "made-up" text).
> What wrong conclusions do you fear here?  Again, the position 
> information is used for phrase queries, but in your situation you 
> wouldn't be using phrase queries so no need to concern yourself with 
> the position stuff at all.

There are some information retrieval settings which tend to say that 
things that appear early in the document should be considered with 
greater score... is there nothing such in Lucene's scoring ?

paul


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