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DM Smith commented on LUCENE-2747:
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Robert, I think we are on the same wavelength. Thanks.
I like the idea of declarative analyzers, too.
Regarding the "last 2 points" has anyone given input to the JFlex team on these needs?
> Deprecate/remove language-specific tokenizers in favor of StandardTokenizer
> ---------------------------------------------------------------------------
>
> Key: LUCENE-2747
> URL: https://issues.apache.org/jira/browse/LUCENE-2747
> Project: Lucene - Java
> Issue Type: Improvement
> Components: Analysis
> Affects Versions: 3.1, 4.0
> Reporter: Steven Rowe
> Fix For: 3.1, 4.0
>
> Attachments: LUCENE-2747.patch, LUCENE-2747.patch
>
>
> As of Lucene 3.1, StandardTokenizer implements UAX#29 word boundary rules to provide
language-neutral tokenization. Lucene contains several language-specific tokenizers that
should be replaced by UAX#29-based StandardTokenizer (deprecated in 3.1 and removed in 4.0).
The language-specific *analyzers*, by contrast, should remain, because they contain language-specific
post-tokenization filters. The language-specific analyzers should switch to StandardTokenizer
in 3.1.
> Some usages of language-specific tokenizers will need additional work beyond just replacing
the tokenizer in the language-specific analyzer.
> For example, PersianAnalyzer currently uses ArabicLetterTokenizer, and depends on the
fact that this tokenizer breaks tokens on the ZWNJ character (zero-width non-joiner; U+200C),
but in the UAX#29 word boundary rules, ZWNJ is not a word boundary. Robert Muir has suggested
using a char filter converting ZWNJ to spaces prior to StandardTokenizer in the converted
PersianAnalyzer.
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