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From "Commit Tag Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4810) Positions are incremented for each ngram in EdgeNGramTokenFilter
Date Thu, 07 Mar 2013 16:10:15 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4810?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13596008#comment-13596008
] 

Commit Tag Bot commented on LUCENE-4810:
----------------------------------------

[trunk commit] Michael McCandless
http://svn.apache.org/viewvc?view=revision&revision=1453937

LUCENE-4810: don't increment position on every gram (only the first, for a given input token)
in EdgeNGramTokenizer/Filter

                
> 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
>            Assignee: Michael McCandless
>             Fix For: 5.0, 4.3
>
>         Attachments: LUCENE-4810.diff, LUCENE-4810.patch, LUCENE-4810.patch
>
>
> 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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