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Posted to dev@lucene.apache.org by "Alan Woodward (JIRA)" <ji...@apache.org> on 2018/03/12 21:52:00 UTC

[jira] [Created] (LUCENE-8202) Add a FixedShingleFilter

Alan Woodward created LUCENE-8202:
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             Summary: 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


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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