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- <title>ReadMe for ICU 53.0.1 development</title>
+ <title>ReadMe for ICU 53.1</title>
<meta name="COPYRIGHT" content=
"Copyright (c) 1997-2014 IBM Corporation and others. All Rights Reserved." />
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<h1>International Components for Unicode<br/>
- <abbr title="International Components for Unicode">ICU</abbr> 53.0.1 development ReadMe</h1>
+ <abbr title="International Components for Unicode">ICU</abbr> 53.1 ReadMe</h1>
- <p><b>Note:</b> This is a development milestone release of ICU4C 53
+ <!--p><b>Note:</b> This is a development milestone release of ICU4C 53
This milestone is intended for those wishing to get an early look at ICU 53 new features and API changes.
+ It is not recommended for production use.</p-->
+ <p><b>Note:</b> This is a release candidate version of ICU4C 53.
It is not recommended for production use.</p>
- <!--<p><b>Note:</b> This is a release candidate version of ICU4C 53.
- It is not recommended for production use.</p>-->
- <p>Last updated: 2014-Jan-11<br />
+ <p>Last updated: 2014-Feb-26<br />
Copyright © 1997-2014 International Business Machines Corporation and
others. All Rights Reserved.</p>
<!-- Remember that there is a copyright at the end too -->
<p>To see which APIs are new or changed in this release, view the <a href="APIChangeReport.html">ICU4C API Change Report</a>. </p>
- <!-- ICU 53 items -->
- <h3>A new ICU 53 item</h3>
- <p>
- Item description
- </p>
-
- <!-- end ICU 53 items -->
-
<h3></h3><!-- for a horizotal rule matching those at the beginning of each h3 -->
<p>The following list concentrates on <em>changes that affect existing
applications migrating from previous ICU releases</em>.
For more news about this release, see the
- <!--
- <a href="http://site.icu-project.org/download/">ICU download page</a>.
- -->
- <a href="http://site.icu-project.org/download/milestone">ICU milestone download page</a>.
- </p>
+ <a href="http://site.icu-project.org/download/">ICU download page</a>
+ <!--a href="http://site.icu-project.org/download/milestone">ICU milestone download page</a>.
+ </p-->.
+
+ <!-- ICU 53 items -->
+ <h3>Collation code re-implemented</h3>
+ <ul>
+ <li>New, incompatible data format of the binary collation data in
+ coll/*.res and coll/ucadata.icu data files.
+ coll/invuca.icu has been removed.</li>
+ <li>Data loading will not fall back to building from rules any more
+ when the binary data is missing or does not match the current implementation.
+ (This removes the dependency from the "runtime" code on the builder.)</li>
+ <li>Rule syntax and semantics tightened and improved, matching
+ <a href="http://unicode.org/repos/cldr/trunk/specs/ldml/tr35-collation.html#Rules">LDML 25 Collation Rule Syntax</a>
+ (TODO: update link for released LDML 25)
+ <ul>
+ <li>In particular, rule chains now must start with a reset.</li>
+ </ul>
+ </li>
+ <li>Setting of variableTop deprecated, and not supported in rule syntax any more
+ <ul>
+ <li>Replaced by the new maxVariable setting; see
+ <a href="http://unicode.org/repos/cldr/trunk/specs/ldml/tr35-collation.html#Collation_Settings">LDML 25 Collation Settings</a>
+ (TODO: update link for released LDML 25)</li>
+ </ul>
+ </li>
+ </ul>
+
+ <!-- end ICU 53 items -->
<h3>C++ BasicTimeZone subclassing-API breaking changes</h3>
<p>We have made make some changes to the C++ BasicTimeZone(basictz.h) for ICU 51
USA</p>
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