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From "Bertrand Delacretaz" <>
Subject Re: Document "freshness" and Boost Functions
Date Wed, 17 Jan 2007 12:49:31 GMT
On 1/17/07, Luis Neves <> wrote:

> ...I see that is possible to use
> "Boost Functions" to influence the score. How would that work in order to
> improve the score of recent documents? (I have a timestamp field in the
> schema)...

I've been using expressions like these in boolean queries, based on  a
"broadcast_date" field:


Where recip computes an age-based score, and linear is used to boost it.

and also the list archives, these functions have been discussed

I'm not sure off the top of my head how to use this with dismax queries though.


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