lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Sean Timm (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-1360) A Similarity class which has unique length norms for numTerms <= 10
Date Thu, 21 Aug 2008 19:32:44 GMT
A Similarity class which has unique length norms for numTerms <= 10
-------------------------------------------------------------------

                 Key: LUCENE-1360
                 URL: https://issues.apache.org/jira/browse/LUCENE-1360
             Project: Lucene - Java
          Issue Type: Improvement
            Reporter: Sean Timm
            Priority: Trivial
         Attachments: ShortFieldNormSimilarity.java

A Similarity class which extends DefaultSimilarity and simply overrides lengthNorm.  lengthNorm
is implemented as a lookup for numTerms <= 10, else as {{1/sqrt(numTerms)}}. This is to
avoid term counts below 11 from having the same lengthNorm after stored as a single byte in
the index.

This is useful if your search is only on short fields such as titles or product descriptions.

See mailing list discussion: http://www.nabble.com/How-to-boost-the-score-higher-in-case-user-query-matches-entire-field-value-than-just-some-words-within-a-field-td19079221.html

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


---------------------------------------------------------------------
To unsubscribe, e-mail: java-dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-dev-help@lucene.apache.org


Mime
View raw message