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Posted to dev@lucene.apache.org by "Hoss Man (JIRA)" <ji...@apache.org> on 2015/11/05 21:34:27 UTC
[jira] [Updated] (LUCENE-6887) 5x: backport ClassicSimilarity, mark
DefaultSimilarity deprecated & update javadocs to mention ClassicSim vs.
BM25Sim
[ https://issues.apache.org/jira/browse/LUCENE-6887?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hoss Man updated LUCENE-6887:
-----------------------------
Attachment: LUCENE-6887.patch
patch for 5x branch with changes (generated using {{svn diff --git}} to preserve the file copy info)
> 5x: backport ClassicSimilarity, mark DefaultSimilarity deprecated & update javadocs to mention ClassicSim vs. BM25Sim
> ---------------------------------------------------------------------------------------------------------------------
>
> Key: LUCENE-6887
> URL: https://issues.apache.org/jira/browse/LUCENE-6887
> Project: Lucene - Core
> Issue Type: Task
> Reporter: Hoss Man
> Assignee: Hoss Man
> Fix For: 5.4
>
> Attachments: LUCENE-6887.patch
>
>
> LUCENE-6789 changed the default Similarity on trunk to BM25, and renamed DefaultSimiliarity to ClassicSimilarity for backcompat w/o confusion about the "default" name.
> But nothing related to this change was committed to the 5x branch.
> On the 5x branch we should:
> * mark DefaultSimiliarity deprecated
> * provide a ClassicSimilarity for 5.x users to switch to to resolve deprecations w/o changing behavior (and allow smooth upgrade to 6.x later)
> * note in the DefaultSimiliarity javadocs that starting with 6.0 BM25 will be the recommended default and users should investigate it
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