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https://issues.apache.org/jira/browse/LUCENE-3475?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless updated LUCENE-3475:
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Labels: gsoc2012 lucene-gsoc-12 (was: )
I think this is important, now that we have "graph" analyzers (like Kuromoji).
So ShingleFilter should pay attention to posInc as well as posLength...
> ShingleFilter should handle positionIncrement of zero, e.g. synonyms
> --------------------------------------------------------------------
>
> Key: LUCENE-3475
> URL: https://issues.apache.org/jira/browse/LUCENE-3475
> Project: Lucene - Java
> Issue Type: New Feature
> Components: modules/analysis
> Affects Versions: 3.4
> Reporter: Cameron
> Priority: Minor
> Labels: gsoc2012, lucene-gsoc-12
>
> ShingleFilter is creating shingles for a single term that has been expanded
> by synonyms when it shouldn't. The position increment is 0.
> As an example, I have an Analyzer with a SynonymFilter followed by a
> ShingleFilter. Assuming car and auto are synonyms, the SynonymFilter produces
> two tokens and position 1: car, auto. The ShingleFilter is then producing 3
> tokens, when there should only be two: car, car auto, auto. This behavior
> seems incorrect.
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