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https://issues.apache.org/jira/browse/LUCENE-5012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16269235#comment-16269235
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Ryan Pedela commented on LUCENE-5012:
-------------------------------------
I just have a question. I am using the word delimiter graph set to both split
and concat followed by a shingle filter set to bigrams. I am getting what
appears to be incorrect results. Is that expected and is the aim of this issue
to fix that?
> Make graph-based TokenFilters easier
> ------------------------------------
>
> Key: LUCENE-5012
> URL: https://issues.apache.org/jira/browse/LUCENE-5012
> Project: Lucene - Core
> Issue Type: Improvement
> Components: modules/analysis
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Attachments: LUCENE-5012.patch, LUCENE-5012.patch
>
>
> SynonymFilter has two limitations today:
> * It cannot create positions, so eg dns -> domain name service
> creates blatantly wrong highlights (SOLR-3390, LUCENE-4499 and
> others).
> * It cannot consume a graph, so e.g. if you try to apply synonyms
> after Kuromoji tokenizer I'm not sure what will happen.
> I've thought about how to fix these issues but it's really quite
> difficult with the current PosInc/PosLen graph representation, so I'd
> like to explore an alternative approach.
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