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https://issues.apache.org/jira/browse/LUCENE-7347?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-7347.
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Resolution: Fixed
Fix Version/s: master (7.0)
Both queryNorm and coords are now gone in master:
- disjunctions just sum up the scores of their matching sub queries,
- boosts are applied as multiplicative factors to the scores.
> Remove queryNorm and coords
> ---------------------------
>
> Key: LUCENE-7347
> URL: https://issues.apache.org/jira/browse/LUCENE-7347
> Project: Lucene - Core
> Issue Type: Improvement
> Reporter: Adrien Grand
> Assignee: Adrien Grand
> Fix For: master (7.0)
>
>
> These two features are specific to TF-IDF and introduce some complexity (see
> eg. handling of coords in BooleanWeight) and bugs/corner-cases (see eg. how
> taking the query norm into account causes scoring challenges on LUCENE-7337).
> Since we made BM25 the default in 6.0, I propose that we remove these
> TF-IDF-specific features in 7.0.
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