You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@lucene.apache.org by "Paul taylor (Commented) (JIRA)" <ji...@apache.org> on 2012/03/09 14:36:57 UTC
[jira] [Commented] (LUCENE-329) Fuzzy query scoring issues
[ https://issues.apache.org/jira/browse/LUCENE-329?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13226066#comment-13226066 ]
Paul taylor commented on LUCENE-329:
------------------------------------
Why has this been closed ?
> Fuzzy query scoring issues
> --------------------------
>
> Key: LUCENE-329
> URL: https://issues.apache.org/jira/browse/LUCENE-329
> Project: Lucene - Java
> Issue Type: Bug
> Components: core/search
> Affects Versions: 1.2
> Environment: Operating System: All
> Platform: All
> Reporter: Mark Harwood
> Priority: Minor
> Fix For: 3.1, 4.0
>
> Attachments: patch.txt
>
>
> Queries which automatically produce multiple terms (wildcard, range, prefix,
> fuzzy etc)currently suffer from two problems:
> 1) Scores for matching documents are significantly smaller than term queries
> because of the volume of terms introduced (A match on query Foo~ is 0.1
> whereas a match on query Foo is 1).
> 2) The rarer forms of expanded terms are favoured over those of more common
> forms because of the IDF. When using Fuzzy queries for example, rare mis-
> spellings typically appear in results before the more common correct spellings.
> I will attach a patch that corrects the issues identified above by
> 1) Overriding Similarity.coord to counteract the downplaying of scores
> introduced by expanding terms.
> 2) Taking the IDF factor of the most common form of expanded terms as the
> basis of scoring all other expanded terms.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@lucene.apache.org
For additional commands, e-mail: dev-help@lucene.apache.org