I believe the code Otis is referring to is here: 
http://issues.apache.org/jira/browse/LUCENE-474

This is index-level analysis but could be adapted to work for just a single 
document.
The implementation is optimised for speed rather than being a thorough 
examination of phrase significance. 

Cheers
Mark

----- Original Message ----
From: Otis Gospodnetic <[EMAIL PROTECTED]>
To: java-user@lucene.apache.org
Sent: Monday, 30 April, 2007 4:11:36 AM
Subject: Re: Keyphrase Extraction

Av, look at Lucene's JIRA and search for Mark Harwood.  I believe he once 
contributed something that does this in JIRA.  If you are interested in a 
commercial solution, I can recommend LingPipe.

Otis
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lucene Consulting - http://lucene-consulting.com/


----- Original Message ----
From: "[EMAIL PROTECTED]" <[EMAIL PROTECTED]>
To: java-user@lucene.apache.org
Sent: Sunday, April 29, 2007 5:24:17 PM
Subject: Keyphrase Extraction

Hi,

I tried using MoreLikeThis contrib feature to extract "interesting terms" from 
a document. This works very well - but only for SINGLE words.

I am looking for a way to extra "keyPHRASES" from a document. Is there an easy 
way to achieve this using Lucene index?

Thanks in advance!
Av

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