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From Grant Ingersoll <gsing...@apache.org>
Subject Re: Bucketing (was Re: Wikia search goes live today)
Date Wed, 09 Jan 2008 13:28:20 GMT
Would be a nice contrib module, though...

-Grant

On Jan 9, 2008, at 5:30 AM, Andrzej Bialecki wrote:

> Otis Gospodnetic wrote:
>> Sounds useful.  I suppose this means one would have custom function
>> for within-bucket-reordering? e.g. for a web search you might reorder
>> based on the URL length if you think shorter URLs are an indicator of
>
>
> Yes, that's precisely the idea. It combines the advantages of simple  
> (hence fast) scoring inside the IR system, with a complex (hence  
> slow) reordering of a small sample of results, performed outside the  
> IR system prior to delivering the results.
>
>
>> higher quality.  It also sounds like something that can easily sit
>> outside Lucene....or do you have something else in mind, such as a
>> mechanism to pass a reordering function in Lucene?
>
> It should definitely be something outside Lucene - it's meant for  
> cases that require more complex ranking (or faster) than those  
> available through function query. I only mentioned this here because  
> it is simple to implement, yet produces useful results difficult to  
> obtain through the usual means (similarity, boosting, even function  
> query).
>
>
> -- 
> Best regards,
> Andrzej Bialecki     <><
> ___. ___ ___ ___ _ _   __________________________________
> [__ || __|__/|__||\/|  Information Retrieval, Semantic Web
> ___|||__||  \|  ||  |  Embedded Unix, System Integration
> http://www.sigram.com  Contact: info at sigram dot com
>
>
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--------------------------
Grant Ingersoll
http://lucene.grantingersoll.com
http://www.lucenebootcamp.com

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