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Posted to java-user@lucene.apache.org by miki sun <su...@hotmail.com> on 2006/04/11 19:46:25 UTC

search.Similarity

Hi there

Is there any theory behind the similarity measure of Lucene?

http://lucene.apache.org/java/docs/api/org/apache/lucene/search/Similarity.html

Thanks

Miki



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Re: search.Similarity

Posted by Erik Hatcher <er...@ehatchersolutions.com>.
In case anyone misses the smiley, I'm just teasing.  Yes, there are  
years of research and heavy duty experience that are behind Lucene.   
There are quite a number of research documents and books that  
describe information retrieval theory and practice, several of them  
linked here:

	<http://wiki.apache.org/jakarta-lucene/InformationRetrieval>


On Apr 11, 2006, at 2:06 PM, Erik Hatcher wrote:

> On Apr 11, 2006, at 1:46 PM, miki sun wrote:
>> Is there any theory behind the similarity measure of Lucene?
>>
>> http://lucene.apache.org/java/docs/api/org/apache/lucene/search/ 
>> Similarity.html
>
> No, Doug just made it up with some random mathematical formulas,  
> just for fun :)
>
> 	Erik
>
>
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Re: search.Similarity

Posted by Erik Hatcher <er...@ehatchersolutions.com>.
On Apr 11, 2006, at 1:46 PM, miki sun wrote:
> Is there any theory behind the similarity measure of Lucene?
>
> http://lucene.apache.org/java/docs/api/org/apache/lucene/search/ 
> Similarity.html

No, Doug just made it up with some random mathematical formulas, just  
for fun :)

	Erik


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