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From "Steven Rowe (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-3747) Support Unicode 6.1.0
Date Tue, 17 Jul 2012 13:04:35 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-3747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13416154#comment-13416154
] 

Steven Rowe commented on LUCENE-3747:
-------------------------------------

Subversion script for trunk:

{code}
svn rm lucene/test-framework/src/java/org/apache/lucene/util/TestRuleIcuHack.java
svn rm lucene/analysis/icu/lib/icu4j-4.8.1.1.jar.sha1
svn rm solr/contrib/extraction/lib/icu4j-4.8.1.1.jar.sha1
svn rm solr/contrib/analysis-extras/lib/icu4j-4.8.1.1.jar.sha1
{code}

branch_4x will need more svn moves and version checks for the versioned grammars.


h2. {{lucene/analysis/common/}}

* I ran {{ant gen-tlds}}
* I ran {{ant jflex}}

h2. {{lucene/analysis/icu/}}

h3. uax29

* I don't fully understand the syntax used in the .rbbi files, so I didn't check whether they
need algorithm updates.  (However, since I didn't need to make any changes for the JFlex version,
probably no algorithm changes needed.)
* I ran {{ant genrbbi}}.

h3. utr30
h4. BasicFoldings.txt: 
* For those things that are "additions to kd" - how to extend?
* For dashes folding, I added some non-included ranges.  Q: should wave dash be folded to
swung dash? (They look the same.)
* I don't know how to extend underline folding - is there a property?
* I don't know how to extend punctuation folding - is there a property?

h4. DiacriticFolding.txt: 
* In the [:Diacritic:] section, I'm not sure how to proceed, as I can see several missing
Latin-1 code points that were almost certainly part of Unicode 6.0.0, so the selection mechanism
is non-transparent.
* In the [:Mark:]&[:Lm:] section, I'm not sure how to make selections, so I didn't try.
* In the "Additional Arabic/Hebrew decompositions" section, I don't know how to extend.
* Other sections were based either on AsciiFoldingFilter or UTR#30, neither of which has changed

h4. DigbatFolding.txt:
* based on AsciiFoldingFilter, which hasn't changed

h4. HanRadicalFolding.txt: 
* based on UTR#30, which hasn't changed

h4. NativeDigitFolding.txt:

* I wrote a shell/perl script, embedded in the text file, to update.
* Should [:No:] DIGIT chars be included?  One currently is: {{19DA;NEW TAI LUE THAM DIGIT
ONE;No;0;L;;;1;1;N;;;;;}}, but others are not (other ranges listed in the patch).

h3. nfkc.txt: 

* New version copied directly from icu-project.org
* There is a problem: the following from {{TestICUFoldingFilter}} fails:

{code:java}
46:  assertAnalyzesTo(a, "Μάϊος", new String[] { "μαιοσ" });
{code}

 AFAICT, this is because the accent decomposition mappings are no longer present in nfkc.txt.
 This makes no sense; Robert, do you know what's happening here?

h3. nfkc_cf.txt: 

* New version copied directly from icu-project.org
                
> Support Unicode 6.1.0
> ---------------------
>
>                 Key: LUCENE-3747
>                 URL: https://issues.apache.org/jira/browse/LUCENE-3747
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: modules/analysis
>    Affects Versions: 3.5, 4.0-ALPHA
>            Reporter: Steven Rowe
>            Priority: Minor
>         Attachments: LUCENE-3747.patch
>
>
> Now that Unicode 6.1.0 has been released, Lucene/Solr should support it.
> JFlex trunk now supports Unicode 6.1.0.
> Tasks include:
> * Upgrade ICU4J to v49 (after it's released, on 2012-03-21, according to http://icu-project.org).
> * Use {{icu}} module tools to regenerate the supplementary character additions to JFlex
grammars.
> * Version the JFlex grammars: copy the current implementations to {{*Impl3<X>}};
cause the versioning tokenizer wrappers to instantiate this version when the {{Version}} c-tor
param is in the range 3.1 to the version in which these changes are released (excluding the
range endpoints); then change the specified Unicode version in the non-versioned JFlex grammars
from 6.0 to 6.1.
> * Regenerate JFlex scanners, including {{StandardTokenizerImpl}}, {{UAX29URLEmailTokenizerImpl}},
and {{HTMLStripCharFilter}}.
> * Using {{generateJavaUnicodeWordBreakTest.pl}}, generate and then run {{WordBreakTestUnicode_6_1_0.java}}
 under {{modules/analysis/common/src/test/org/apache/lucene/analysis/core/}}

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