Alan Woodward updated LUCENE-8202:
    Attachment: LUCENE-8202.patch

> Add a FixedShingleFilter
> ------------------------
>                 Key: LUCENE-8202
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8202
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>            Priority: Major
>         Attachments: LUCENE-8202.patch
> In LUCENE-3475 I tried to make a ShingleGraphFilter that could accept and 
> emit arbitrary graphs, while duplicating all the functionality of the 
> existing ShingleFilter.  This ends up being extremely hairy, and doesn't play 
> well with query parsers.
> I'd like to step back and try and create a simpler shingle filter that can be 
> used for index-time phrase tokenization only.  It will have a single fixed 
> shingle size, can deal with single-token synonyms, and won't emit unigrams.

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