Xapian discuss - Jan 2006 - Prioritizing xapian search results

Hello

It is possible somehow to give higher priority to recent document. For 
example, when adding new document to the database, I will add a term 
that specifies date of the document. During the search, the date of the 
document is taken into account in the algorithm that calculates 
document relevancy.

In another project I am working on, I would like to limit number of 
pages returned from the same site. Basically I need to limit number of 
results that could have the same term that specifies site id. I would 
like to know if this could be done.

I will really appreciate your help

Yuli

http://www.bannershift.com/
http://www.ircjunky.com/

On Sun, Jan 29, 2006 at 05:45:36PM -0500, info@bannershift.com
wrote:
> It is possible somehow to give higher priority to recent document. For 
> example, when adding new document to the database, I will add a term 
> that specifies date of the document. During the search, the date of the 
> document is taken into account in the algorithm that calculates 
> document relevancy.
This is what the match bias functor was originally intended to be for.
You might find it useful in its current state:

http://www.xapian.org/docs/apidoc/html/classXapian_1_1Enquire.html#a13
> In another project I am working on, I would like to limit number of 
> pages returned from the same site. Basically I need to limit number of 
> results that could have the same term that specifies site id. I would 
> like to know if this could be done.
You can can eliminate all but one page from the same site by adding
the sitename as a value and using Enquire::set_collapse_key:

http://www.xapian.org/docs/apidoc/html/classXapian_1_1Enquire.html#a5

I think it should be possible to enhance the collapse key to keep up to
N matches (where N can be specified).  I'll investigate when I get a
chance.

Cheers,
    Olly