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https://issues.apache.org/jira/browse/LUCENE-5318?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14192261#comment-14192261
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Tim Allison commented on LUCENE-5318:
-------------------------------------

Added working code (for 4.10.2) to github 
[repo|https://github.com/tballison/lucene-addons] -- combination of LUCENE-5317 
and this issue.  

Next step is to clean up code against trunk in github fork and then post to 
review board.

> Co-occurrence counts from Concordance
> -------------------------------------
>
>                 Key: LUCENE-5318
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5318
>             Project: Lucene - Core
>          Issue Type: New Feature
>          Components: core/search
>    Affects Versions: 4.5
>            Reporter: Tim Allison
>              Labels: patch
>             Fix For: 4.9
>
>         Attachments: cooccur_v1.patch.gz
>
>
> This patch calculates co-occurrence statistics on search terms within a 
> window of x tokens.  This can help in synonym discovery and anywhere else 
> co-occurrence stats have been used.
> The attached patch depends on LUCENE-5317.
> Again, many thanks to my colleague, Jason Robinson, for advice in developing 
> this code and for his modifications to this code to make it more 
> Solr-friendly.



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