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From "Adrien Grand (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-8286) UnifiedHighlighter should support the new Weight.matches API for better match accuracy
Date Thu, 03 May 2018 12:34:00 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-8286?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16462361#comment-16462361
] 

Adrien Grand commented on LUCENE-8286:
--------------------------------------

bq. MI has things we don't need – position spans

I don't know the unified highlighter well, but I would expect this information to be important
to score passages? For instance if you run a sloppy phrase query, matches that have a smaller
width should get a higher weight, shouldn't they?

> UnifiedHighlighter should support the new Weight.matches API for better match accuracy
> --------------------------------------------------------------------------------------
>
>                 Key: LUCENE-8286
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8286
>             Project: Lucene - Core
>          Issue Type: Improvement
>          Components: modules/highlighter
>            Reporter: David Smiley
>            Priority: Major
>
> The new Weight.matches() API should allow the UnifiedHighlighter to more accurately highlight
some BooleanQuery patterns correctly -- see LUCENE-7903.
> In addition, this API should make the job of highlighting easier, reducing the LOC and
related complexities, especially the UH's PhraseHelper.  Note: reducing/removing PhraseHelper
is not a near-term goal since Weight.matches is experimental and incomplete, and perhaps we'll
discover some gaps in flexibility/functionality.
> This issue should introduce a new UnifiedHighlighter.HighlightFlag enum option for this
method of highlighting.   Perhaps call it {{WEIGHT_MATCHES}}?  Longer term it could go away
and it'll be implied if you specify enum values for PHRASES & MULTI_TERM_QUERY?



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