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https://issues.apache.org/jira/browse/LUCENE-3942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael McCandless resolved LUCENE-3942.
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Resolution: Fixed
> SynonymFilter should set pos length att
> ---------------------------------------
>
> Key: LUCENE-3942
> URL: https://issues.apache.org/jira/browse/LUCENE-3942
> Project: Lucene - Java
> Issue Type: Improvement
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 4.0
>
> Attachments: LUCENE-3942.patch
>
>
> Tokenizers/Filters can now produce graphs instead of a single linear
> chain of tokens, by setting the PositionLengthAttribute, expressing
> where (how many positions ahead) this token "ends".
> The default is 1, meaning it ends at the next position, to be
> backwards compatible.
> SynonymFilter produces graph output tokens, as long as the output is a
> single token, but currently never sets the pos length to express this.
> EG for the rule "wifi network -> hotspot", the hotspot token should
> have pos length = 2. With LUCENE-3940 this will allow us to verify
> that the offsets for such tokens are correct...
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