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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2017/12/17 13:21:00 UTC
[jira] [Commented] (LUCENE-5012) Make graph-based TokenFilters
easier
[ https://issues.apache.org/jira/browse/LUCENE-5012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16294139#comment-16294139 ]
Michael McCandless commented on LUCENE-5012:
--------------------------------------------
This issue should make it easier to fix the bug you're seeing, but we can also fix the bug (in {{ShingleFilter}} I'm guessing?) before doing this more ambitious change.
It sounds like {{ShingleFilter}} is not looking at {{PositionLengthAttribute}}?
> 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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