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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3220) Implement various ranking models as Similarities
Date Mon, 20 Jun 2011 16:12:47 GMT


Robert Muir commented on LUCENE-3220:

oh two more nitpicky comments: 
* can you update the patch to use two-spaces instead of tabs? if you use eclipse, you can
download this and configure this as your default codestyle:
* can you also remove the @author? For legal reasons (i think actually for your protection!)
we omit these from new files.
* it might be a good idea to use the tag @lucene.experimental also for new classes: this is
a template that 'ant-javadocs' replaces with "WARNING: This API is experimental and might
change in incompatible ways in the next release." to tell users that its very new and not
to expect precise backwards compatibility.

> Implement various ranking models as Similarities
> ------------------------------------------------
>                 Key: LUCENE-3220
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Sub-task
>          Components: core/search
>    Affects Versions: flexscoring branch
>            Reporter: David Mark Nemeskey
>            Assignee: David Mark Nemeskey
>              Labels: gsoc
>         Attachments: LUCENE-3220.patch, LUCENE-3220.patch
>   Original Estimate: 336h
>  Remaining Estimate: 336h
> With [LUCENE-3174|] done, we can finally
work on implementing the standard ranking models. Currently DFR, BM25 and LM are on the menu.
>  * {{EasyStats}}: contains all statistics that might be relevant for a ranking algorithm
>  * {{EasySimilarity}}: the ancestor of all the other similarities. Hides the DocScorers
and as much implementation detail as possible
>  * _BM25_: the current "mock" implementation might be OK
>  * _LM_
>  * _DFR_
> Done:

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