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From "Steven Rowe (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2167) Implement StandardTokenizer with the UAX#29 Standard
Date Mon, 10 May 2010 18:54:30 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12865863#action_12865863
] 

Steven Rowe commented on LUCENE-2167:
-------------------------------------

Good point, Marvin - indexing URLs makes no sense without query support for them.  (Is this
a stupid can of worms for me to have opened?)  I have used Lucene tokenizers for other things
than retrieval (e.g. term vectors as input to other processes), and I suspect I'm not alone.
The ability to extract URLs would be very nice.

Ideally, URL analysis would produce both the full URL as a single token, and as overlapping
tokens the hostname, path components, etc.  However, I don't think it's a good idea for the
tokenizer to output overlapping tokens - I suspect this would break more than a few things.

A filter that breaks URL type tokens into their components, and then adds them as overlapping
tokens, or replaces the full URL with the components, should be easy to write, though.


> Implement StandardTokenizer with the UAX#29 Standard
> ----------------------------------------------------
>
>                 Key: LUCENE-2167
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2167
>             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, 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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