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https://issues.apache.org/jira/browse/LUCENE-5012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13666519#comment-13666519
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Artem Lukanin edited comment on LUCENE-5012 at 5/24/13 6:19 PM:
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Great! I was asking several people about it at Lucene/Solr Revolution 2013.
Just don't forget, that if you set your default operator to AND, you should
still use ORs for synonyms. I was trying to solve this problem partly in
SOLR-4533. I'm not sure, how the combination of ORs and ANDs is done in an FSA
if you are going to use WordAutomaton right away.
was (Author: alukanin):
Great! I was asking several people about it at Lucene/Solr Revolution 2013.
Just don't forget, that if you set your default operator to AND, you should
still use ORs for synonyms. I was trying to solve this problem partly in
#SOLR-4533. I'm not sure, how the combination of ORs and ANDs is done in an FSA
if you are going to use WordAutomaton right away.
> 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
>
>
> 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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