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2.4.0 2015-06-21
	* Fix: Added rules 21b and 22.02 introduced by Unicode 8.0.0.
	* Update -version-info from 4:6:1 to 4:7:1.

2.3.3 2015-06-21
	* Withdrawn.
	* Update UCD to 8.0.0.

2.3.2 2014-06-20
	* Update UCD to 7.0.0.

2.3.2beta1 2014-05-04
	* Update UCD to 7.0.0 beta at 2014-03-18.
	* Moved repository to GitHub.

2.3.1 2013-09-28
	* Update UCD to 6.3.0.
	* Typo in README.ja_JP.

2.3.1beta1  2013-03-26
	* Update UCD to 6.3.0 beta at 2013-03-02.

2.3.0  2012-10-01
	* Update UCD to 6.2.0.
	* data/custom.pl:
	* data/data.pl:
	* lib/charprop.c:
	* lib/gcstring.c:
	  - EA_Z was devided to EA_Z, EA_ZA and EA_ZW which are nonspacing
	    variants of EAW "N", "A" and "W", respectively.  Currently,
	    there are no differences between EA_Z and EA_ZA.
	  - VIRAMA_AS_JOINER option had been applicable to versions prior
	    to 6.1.0.

2.3.0gamma1  2012-08-18
	* data/Rules-6.2.0beta.txt:
	* data/constants.pl:
	* data/custom.pl:
	* data/data.pl:
	* lib/charprop.c:
	* lib/gcstring.c:
	  - Changes based on new drafts of UAX#14/UAX#29 (not yet published).
	    GCB Joiner and After_Joiner and LBC ZJ are withdrawn by UC.  As
	    also NonJoiner.

2.3.0beta1  2012-07-14
	* Update UCD to 6.2.0beta at Jun 05 2012.
	* config.guess:
	* config.sub:
	  - updated.
	* data/constants.pl:
	* data/custom.pl:
	* data/data.pl:
	* data/makefile:
	  - custom Grapheme_Cluster_Break property value "ZWJ" is divided
	    to "NonJoiner" (U+200C ZERO WIDTH NON-JOINER) and "Joiner"
	    (U+200D ZERO WIDTH JOINER).
	  - Store custom GCB to *.custom file.
	* lib/charprop.c:
	  - Added ZJ/Joiner case of guessed properties.
	* lib/gcstring.c:
	  - Updated GCB rules.
	* Makefile.am:
	  - increase -version-info from 4.5.1 to 4.6.1.

2.2.1  2012-04-11
	* lib/gcstring.c:
	  - Treat an isolated hangul jamo as wide, though some of them
	    are assigned EAW neutral (N).  cf. the discussion:
	    http://lists.w3.org/Archives/Public/public-i18n-cjk/2011JanMar/thread.html#msg55
	* REAME:
	* README.ja_JP:
	  - About naming.

2.2.0  2012-04-02
	* data/constants.pl:
	* data/data.pl:
	  - NEW: added custom Grapheme_Cluster_Break property value
	    "ZWJ", U+200C ZERO WIDTH JOINER or U+200D ZERO WIDTH
	    NON-JOINER.  They are lb:CM and gb:Extend but aren't gc:M
	    so do not affect to Legacy-CM rule.
	* tests/01break.t:
	  - Added Korean (NFD) test.
	* tests/03ns.t:
	  - Added loose nonstarter test.

2.2.0beta  2012-03-30
	* License Change:
	  - From now on, sombok is distributed under dual license of
	    GPL *and* Artistic License.
	* configure.ac:
	  - Move variable version informations to files: UNICODE and VERSION.
	* lib/break.c:
	  - New: linebreak_free_result(): to free result of 
	    linebreak_break*() so that implementation mismatches of malloc
	    functions are hidden.
	* lib/charprop.c:
	  - New: linebreak_merge_lbclass(), linebreak_merge_eawidth().
	* lib/gcstring.c:
	  - New: gcstring_lbclass(), gcstring_lbclass_ext().
	* lib/linebreak.c:
	  - Specify strict prototypes for some more functions.
	  - linebreak_get_lbrule(): Concern LEGACY_CM and HANGUL_AS_AL
	    options. 
	  - Obsoleted: linebreak_lbclass(), linebreak_lbclass_ext(),
	    linebreak_eawidth().
	* Makefile.am:
	  - increase -version-info from 4.4.1 to 4.5.1.
	* Added TODO.

2.1.1  2012-02-25
	* config.guess:
	* config.sub:
	  - updated.
	* data/Rules-6.1.0.txt:
	  - Correct revision date of UAX#14.
	* include/sombok.h.in:
	* lib/linebreak.c:
	  - Specify strict prototypes of callback members of linebreak_t.
	* lib/break.c:
	* lib/gcstring.c:
	  - Chg: Now Legacy-CM rule is applied during grapheme cluster 
	    breaking.  If this rule is disabled, SPACE and succeeding 
	    combining mark are not conjoined.
	  - Chg: Morbid hangul syllable block (e.g. <L Extend V T>) no 
	    longer does not form single grapheme cluster.

2.1.0  2012-02-04
	* Release 2.1.0.
	* Makefile.am:
	  - increase -version-info from 4.3.1 to 4.4.1.
	* tests/01break.t:
	  - Added Sanskrit (sa) case.

2.1.0beta2  2012-01-29
	* data/constants.pl:
	* data/data.pl:
	  - NEW: added custom Grapheme_Cluster_Break property values 
	    "Virama" and "OtherLetter".  Former means characters having 
	    canonical combining class 9 (Virama) (they are either Extend or
	    SpacingMark).  Latter means characters having general category
	    L? and Grapheme_Cluster_Break Other.  They are currently limited 
	    to Brahmic scripts.
	* lib/break.c:
	  - NEW: linebreak_break_from_utf8().
	  - Chg: charmax may be 0 (unlimited).  NOTE: this feature has not been
	    tested enough.
	* lib/gcstring.c:
	  - NEW: gcstring_new_from_utf8().
	  - NEW: LINEBREAK_OPTION_VIRAMA_AS_JOINER option of linebreak object
	    controls if virama characters behave as consonant joiner.
	* lib/utf8.c:
	  - NEW: sombok_decode_utf8(), sombok_encode_utf8().

2.1.0beta  2012-01-01
	* Bump up minor version.
	* Update UCD to 6.1.0beta at Dec 15 2011.
	* config.sub:
	* config.guess:
	  - Updated.
	* data/Rules-6.0.0.txt:
	  - Backport - removed LB25 entries.
	* lib/break.c:
	  - _break_partial(): Fix: LB25 preprocessing can miss partial input.
	* lib/charprop.c:
	* lib/lineBreak.c:
	* include/sombok.h.in:
	  - New option LINEBREAK_OPTION_NONSTARTER_LOOSE to control strictness
	    of line breaking behavior.  If it is set, a newly introduced class
	    CJ will be treated as ID, otherwise NS.
	* t/02hangul.t:
	  - Unicode 6.1.0beta changed general category of hangul bangjeom
	    (U+302E and U+302F) from Mn to Mc.
	* [Note] ``Compact array'' became smaller than 8192 entries again.

2.0.6  2011-11-01
	Backport from 2.1.0beta; Unicode data version 6.0.0.
	* data/Rule-6.0.0.txt:
	  - Removed LB25 entries since they are handled by hardcoded
	    preprocessing.
	* debian/*:
	  - Updated Debian packaging info by which in Debian sid packaged by
	    Emmanuel Bouthenot.
	* lib/break.c:
	  - Implemented strict LB25 rule.  See also UAX#14 8.2 Example 7.
	  - Moved linebreak_lbrule() from linebreak.c to break.c.
	  - For compatibility, linebreak_lbrule() gives results by simplified
	    rules LB1, LB25 and emulates LB9, LB10.
	* src/sombok.c:
	  - Fix SF.net bug #3400519(1): removed ESTRPIPE which is specific to
	    Linux etc.  Reported by Yusuke Muraoka (jbking@sf.net).
	* tests/01break.t:
	  - Added Hebrew (he) test.
	* config.guess:
	* config.sub:
	  - Updated.
	* COPYING:
	  - Fix CPAN RT#71657: Updated street address of FSF.  Reported by
	    Xavier Bachelot.

2.0.6beta2  2011-10-26
	* data/Rules-6.1.0beta.txt:
	  - Removed LB25 entries since they are handled by hardcoded
	    preprocessing.
	* debian/*:
	  - Updated Debian packaging info by which in Debian sid packaged by
	    Emmanuel Bouthenot.
	* lib/break.c:
	  - Implemented strict LB25 rule.  See also UAX#14 8.2 Example 7.
	  - Moved linebreak_lbrule() from linebreak.c to break.c.
	  - For compatibility, linebreak_lbrule() gives results by simplified
	    rules LB1, LB21a & LB25 and emulates LB9, LB10.
	* lib/linebreak.c:
	  - New: linebreak_get_lbrule(): Resolve AI then apply
	    linebreak_lbrule().

2.0.6beta1  2011-10-21
	* Update UCD to 6.1.0beta at Sep 19.
	* lib/break.c:
	  - New prep for LB21a about HL (as of UAX#14 rel 27; 6.1.0 draft 2).
	* lib/charprop.c:
	  - Unassigned codepoints (Cn) are GCB Control, not Other (as of
	    Unicode 6.1.0beta data).
	* lib/linebreak.c:
	  - linebreak_lbrule(): treat HL as AL.
	* Makefile.am:
	  - increase -version-info from 4.2.1 to 4.3.1.
	* src/sombok.c:
	  - Fix SF.net bug #3400519(1): removed ESTRPIPE which is specific to
	    Linux etc.  Reported by Yusuke Muraoka (jbking@sf.net).
	* tests/01break.t:
	  - Added Hebrew (he) test.
	* config.guess:
	* config.sub:
	  - Updated.
	* COPYING:
	  - Fix CPAN RT#71657: Updated street address of FSF.  Reported by
	    Xavier Bachelot.
	* [Note] ``Compact array'' has grown bigger than 8191 entries.
	  Therefore the architectures with 16-bit signed pointer won't be
	  supported anymore.

2.0.5  2011-04-23
	* No new features.
	* New versioning scheme. Suggested by Emmanuel Bouthenot.

2011.5RC  Sat Apr 16 2011
	* break.c:
	  - Bug Fix: Infinite loop occurs when prep_func generated very long
	    (> charmax) unbreakable line.
	* utils.c:
	  - linebreak_prep_URIBREAK(): loosely refers RFC3986.

2011.4  Fri Apr 01 2011
	* Added Debian packaging info.
	* Makefile.am:
	  - increase -version-info from 4.1.1 to 4.2.1.
	  - added doc rules.
	* sombok.h.in: new macro SOMBOK_VERSION.

2011.4RC  Sat Mar 26 2011
	* charprop.c, break.c: Fix groundless coding denied by honest C
	  compilers (e.g. Solaris cc).
	* Makefile.am: Added README.ja_JP to EXTRA_DIST.
	* tests/lb.sh: function definition suitable for both bash and d?ash.

2011.3  Mon Mar 21 2011
	* tests/01break.t: Added tests for Vietnamese.

2011.3RC  Sun Mar 13 2011
	* configure.ac: unichar_t may be unsigned int or unsigned long.
	* include/sombok.h: now generated from include/sombok.h.in.
	* Bug Fix: southeastasian.c: th_wbrk() may return 0 _or_ -1 when
	  breaking position was not found.
	* break.c: some optimizations.

2011.2  Sat Mar 05 2011
	* charprop.c: Fix: _add_prop() broke custom map.

2011.2beta1  Sat Feb 26 2011
	* charprop.c: New: linebreak_update_lbclass(),
	  linebreak_clear_lbclass(), linebreak_update_eawidth(),
	  linebreak_clear_eawidth().
	* tests/03ns.t: added test on custom map.
	* tests/06context.t: added test on custom map.
	* Typos: GBC will be GCB.
	* Chg: update -version-info to 4:1:1.

2011.1	Sat Feb 19 2011
	* Chg: update -version-info to 4:0:1.
	* Doc: some additions.

2011.1RC	Fri Feb 11 2011
	* break.c: New: ``preprocess'' callback feature. user_func is obsoleted.
	* utils.c: built-in preprocess callback linebreak_prep_URIBREAK().
	* sombok.c: custom format callback using shell script.
	* Test: added test data for ``make check''.

2011.0	Wed Jan 26 2011
	* Brush-up documentations.
	* ``make check'' feature (incomplete).

2011.0RC	Thu Jan 20 2011
	* Fix: Eliminated all (maybe, ...hopefully) memory leaks.
	* Chg: split part of gcstring_substr() to gcstring_replace().

2011.0b1	Sun Jan 15 2011 
	* First beta of new major release.

Important Changes beside Linebreak 1.x:

	* 1.x has memory leaks & potantial buffer overrun vulnerabilities.
	  Switching to release 20XX is strongly recommended.
	* Renamed package name from Linebreak to Sombok.
	* Major changes on public interface:
	- urgent_func callback takes two arguments, not five.
	- sizing_func callback with extra 6th argument was obsoleted.
	- default sizing method simply returns number of grapheme
	  clusters, not number of columns based on UAX #11.  For
	  compatible behavior with 1.x, use linebreak_sizing_UAX11()
	  built-in callback function.
	- linebreak_break*() functions return array of lines, not
	  single Unicode string.  Additinally, elements of array are
	  grapheme cluster strings.

About change history until release 1.x see ChangeLog.REL1 file.