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From "Steven Rowe (JIRA)" <>
Subject [jira] Commented: (LUCENE-2167) Implement StandardTokenizer with the UAX#29 Standard
Date Fri, 07 May 2010 14:31:49 GMT


Steven Rowe commented on LUCENE-2167:

I ran contrib/benchmark over 10k Reuters docs with tokenization-only analyzers; Sun JDK 1.6,
Windows Vista/Cygwin; best of five:


I think UAX29Tokenizer is slower than StandardTokenizer because it does the lookahead/chaining
thing.  Still, decent performance.

> Implement StandardTokenizer with the UAX#29 Standard
> ----------------------------------------------------
>                 Key: LUCENE-2167
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: contrib/analyzers
>    Affects Versions: 3.1
>            Reporter: Shyamal Prasad
>            Assignee: Steven Rowe
>            Priority: Minor
>         Attachments: LUCENE-2167.patch, LUCENE-2167.patch, LUCENE-2167.patch
>   Original Estimate: 0.5h
>  Remaining Estimate: 0.5h
> It would be really nice for StandardTokenizer to adhere straight to the standard as much
as we can with jflex. Then its name would actually make sense.
> Such a transition would involve renaming the old StandardTokenizer to EuropeanTokenizer,
as its javadoc claims:
> bq. This should be a good tokenizer for most European-language documents
> The new StandardTokenizer could then say
> bq. This should be a good tokenizer for most languages.
> All the english/euro-centric stuff like the acronym/company/apostrophe stuff can stay
with that EuropeanTokenizer, and it could be used by the european analyzers.

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