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ICU-11562 improve script code API docs

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X-SVN-Rev: 37136
This commit is contained in:
Markus Scherer 2015-03-04 22:24:12 +00:00
parent 05a29b34c9
commit 980e3f32de
1 changed files with 33 additions and 10 deletions
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43
icu4j/main/classes/core/src/com/ibm/icu/lang/UScript.java
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@ -1,6 +1,6 @@
/**
*******************************************************************************
* Copyright (C) 2001-2014 International Business Machines Corporation and
* Copyright (C) 2001-2015 International Business Machines Corporation and
* others. All Rights Reserved.
*******************************************************************************
*/
@ -14,10 +14,30 @@ import com.ibm.icu.impl.UCharacterProperty;
import com.ibm.icu.util.ULocale;
/**
* A class to reflect UTR #24: Script Names
* (based on ISO 15924:2000, "Code for the representation of names of
* scripts"). UTR #24 describes the basis for a new Unicode data file,
* Scripts.txt.
* Constants for ISO 15924 script codes, and related functions.
*
* <p>The current set of script code constants supports at least all scripts
* that are encoded in the version of Unicode which ICU currently supports.
* The names of the constants are usually derived from the
* Unicode script property value aliases.
* See UAX #24 Unicode Script Property (http://www.unicode.org/reports/tr24/)
* and http://www.unicode.org/Public/UCD/latest/ucd/PropertyValueAliases.txt .
*
* <p>Starting with ICU 3.6, constants for most ISO 15924 script codes
* are included, for use with language tags, CLDR data, and similar.
* Some of those codes are not used in the Unicode Character Database (UCD).
* For example, there are no characters that have a UCD script property value of
* Hans or Hant. All Han ideographs have the Hani script property value in Unicode.
*
* <p>Private-use codes Qaaa..Qabx are not included.
*
* <p>Starting with ICU 55, script codes are only added when their scripts
* have been or will certainly be encoded in Unicode,
* and have been assigned Unicode script property value aliases,
* to ensure that their script names are stable and match the names of the constants.
* Script codes like Latf and Aran that are not subject to separate encoding
* may be added at any time.
*
* @stable ICU 2.4
*/
public final class UScript {
@ -933,12 +953,15 @@ public final class UScript {
*/
public static final int SIDDHAM = 166; /* Sidd */
/* Private use codes from Qaaa - Qabx are not supported */
/**
* One higher than the last ISO 15924 script code integer.
* This value will increase as ISO 15924 adds script codes
* for which integer constants are added above.
* <p>One higher than the last script code constant.
* This value increases as constants for script codes are added.
*
* <p>There are constants for Unicode 7 script property values.
* There are constants for ISO 15924 script codes assigned on or before 2013-10-12.
* There are no constants for private use codes from Qaaa - Qabx
* except as used in the UCD.
*
* @stable ICU 2.4
*/
public static final int CODE_LIMIT = 167;