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List:       lucene-dev
Subject:    Re: New "Did you mean" feature: How to approach?
From:       Dave Spencer <dave-lucene-dev () tropo ! com>
Date:       2005-03-29 11:16:50
Message-ID: 42493922.7080800 () tropo ! com
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Otis Gospodnetic wrote:

>Maybe the spellchecker at the bottom of the following URL will help:
>
>  http://svn.apache.org/repos/asf/lucene/java/trunk/contrib/
>  
>

Yeah, I did this, the "ngram based spelling corrector".

You build a normal lucene index as you always do
then run NGramSpeller, analyzes your index to determine which ngrams are 
used, and saves this in a separate Lucene index
then you call NGramSpeller.suggestUsingNGrams()  if  a users query 
doesn't return too many results

weblog entry here w/ more info and a test page:

http://www.searchmorph.com/weblog/index.php?id=23


--

Some chance you'll be instested in the "more like this" similarity query 
generator - see the "similar" tree in the sandbox

-- Dave

>Otis
>
>
>--- "Stefan F. Keller" <sfkeller@gmail.com> wrote:
>  
>
>>We would like to add "Did you mean..." to our Lucene-based search
>>engine www.geometa.info. Doug mentioned in his recent interview that
>>this feature would be not too complicated to implement.
>>
>>First I considered integrating a spelling checker (through JADT-API)
>>but one would rather expect "nearby" words which really exist in the
>>document pool. Some people have mentioned this feature here (or on
>>the
>>java-user-list).
>>
>>=> Is anyone aware of any real developments in this area? 
>>
>>Ideally, one would combine the data already maintained by the
>>IndexReader class with an existing similarity search algorithm (like
>>trigram)...
>>
>>=> Any ideas?
>>
>>Stefan
>>
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