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From Otis Gospodnetic <otis_gospodne...@yahoo.com>
Subject Re: Inquiry on Lucene Stemming
Date Mon, 22 Dec 2008 03:17:32 GMT
If Hoss is referring to synonym expansion, allow me to point out that freely downloadable code
from Lucene in Action (first edition) has code for that, if you'd like to have a look, OP.

Otis 
--
Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch



----- Original Message ----
> From: Chris Hostetter <hossman_lucene@fucit.org>
> To: java-user@lucene.apache.org
> Sent: Saturday, December 20, 2008 2:12:21 PM
> Subject: Re: Inquiry on Lucene Stemming
> 
> 
> : Well some client inquiries if it's possible to expand such simple words 
> : and does Lucene have an API for this logic? Because all I read was the 
> : stemming logic for Lucene was the other way around which is, example 
> : "flashing" it will be trimmed to the root word "flash" when searched.
> 
> there are two fundemental approaches (that i know of) to stemming: 
> reduction and expansion.
> 
> reduction can either be algorithmic, or morphologically/dictionary based.  
> expansion esentially has to be morphologically based.
> 
> The SnowballAnalyzer uses the Snowball stemming algorithm, which is a 
> reduction approach to stemming.  if you want an expansion based appraoch, 
> you have to have a dictionary.  Lucene doens't provide one of these, but 
> that doens't mean you can't use one if you find one -- it's been a while 
> since i looked but the only ones i've ever seen were only commercially 
> avialable.
> 
> http://en.wikipedia.org/wiki/Stemming
> 
> 
> 
> 
> -Hoss
> 
> 
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