Adrien Grand created LUCENE-7536:
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Summary: ASCIIFoldingFilterFactory.getMultiTermComponent can emit
two tokens
Key: LUCENE-7536
URL: https://issues.apache.org/jira/browse/LUCENE-7536
Project: Lucene - Core
Issue Type: Bug
Reporter: Adrien Grand
Priority: Minor
My understanding is that it is a requirement for multi-term analysis to only
normalize tokens, and not eg. remove tokens (stop filter) or add tokens (by
tokenizing or adding synonyms). Yet
ASCIIFoldingFilterFactory.getMultiTermComponent will return a factory that
emits synonyms if preserveOriginal is set to true on the original filter.
This looks like a bug to me but I'm not entirely sure how to fix it. Should the
multi-term analysis component do ascii folding or not if the original factory
has preserveOriginal set to true?
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