http://swish-e.org/docs/swish-faq.html#how_is_ranking_calculated_

Tito Sierra scribbled on 1/20/06 11:17 AM:

> Hello,
> 
> I'm looking for some documentation describing the current ranking  
> algorithm in use by either swish-e 2.4.X or 2.2.X.  This need not be  
> a full technical description, but a description of what factors  
> influence document ranking.
> 
> Is it accurate to say that SWISH-E employs a variant of "tf-idf" for  
> ranking?
> 	http://en.wikipedia.org/wiki/Tf-idf
> 
>  From reading the mailing list archives I understand there is  
> interest in improving the ranking algorithm.  For my purposes SWISH-E  
> works great as is.  Very nice tool.  My immediate interest is not in  
> tweaking or improving the current algorithm, but in describing it to  
> others.  If someone has already gone through the trouble of writing  
> this up I would love to cite them.  Apologies if I have missed  
> something in the mail archives or the swish-e.org website.
> 
> Thanks,
> Tito
> 
> P.S. I have read Josh Rabinowitz's very useful article "Indexing  
> Arbitrary Data with SWISH-E."  I'm hoping for something more  
> descriptive than this:
> 
> "The ranking algorithm used in swish-e does not bear easy  
> explanation, but does take into account factors including the size of  
> the documents, the frequency of each word in the document, and which  
> tags the given text resides in."

-- 
Peter Karman  .  http://peknet.com/  .  peter(at)not-real.peknet.com