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Posted to dev@lucene.apache.org by "Walter Underwood (JIRA)" <ji...@apache.org> on 2013/03/02 01:47:12 UTC

[jira] [Created] (LUCENE-4810) Positions are incremented for each ngram in EdgeNGramTokenFilter

Walter Underwood created LUCENE-4810:
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             Summary: Positions are incremented for each ngram in EdgeNGramTokenFilter
                 Key: LUCENE-4810
                 URL: https://issues.apache.org/jira/browse/LUCENE-4810
             Project: Lucene - Core
          Issue Type: Bug
          Components: modules/analysis
            Reporter: Walter Underwood


Edge ngrams should be like synonyms, with all the ngrams generated from a token having the same position as that original token. The current code increments position.

For the text "molecular biology", the query "mol bio" should match as a phrase in neighboring positions. It does not.

You can see this in the Analysis page in the admin UI.

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