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https://issues.apache.org/jira/browse/LUCENE-8490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16606837#comment-16606837
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Alan Woodward commented on LUCENE-8490:
---------------------------------------

Here's a preliminary patch outlining the idea.
 * I've called the base class Feature, but maybe something that includes a 
reference to score or boost might be better?
 * This is aimed at lucene 8 and just cuts everything over to the new class 
hierarchy, but it would be simple enough to add deprecations using a query 
wrapper if we wanted to get it into the 7x series

> Separate scoring features from Queries
> --------------------------------------
>
>                 Key: LUCENE-8490
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8490
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>            Priority: Major
>         Attachments: LUCENE-8490.patch
>
>
> We currently have two types of 'purely scoring' queries, produced by static 
> methods on FeatureField and more recently on LongPoint (for distance or 
> recency boosting).  These don't really make sense as standalone queries, and 
> are designed to be used as supplementary SHOULD clauses in boolean queries.  
> I think these would be easier to use (and would prevent misuses, such as 
> using them in FILTER or MUST clauses) if we designated them as Features 
> instead, with a separate class hierarchy, and add a specific feature() method 
> to BooleanQuery.Builder.



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