PropList-3.2.0.html
306 lines<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta http-equiv="Content-Language" content="en-us">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<meta name="keywords" content="unicode, normalization, composition, decomposition">
<meta name="description" content="Describes PropList.html">
<title>UCD: Extended Character Properties</title>
<link rel="stylesheet" type="text/css" href="http://www.unicode.org/reports/reports.css">
</head>
<body bgcolor="#ffffff">
<table class="header" width="100%">
<tr>
<td class="icon"><a href="http://www.unicode.org"><img align="middle" alt="[Unicode]" border="0" src="http://www.unicode.org/webscripts/logo60s2.gif" width="34" height="33"></a> <a class="bar" href="UnicodeCharacterDatabase.html">Unicode
Character Database</a></td>
</tr>
<tr>
<td class="gray"> </td>
</tr>
</table>
<blockquote>
<h1>Extended Character Properties</h1>
<table border="1" style="width:100%">
<tbody>
<tr>
<td valign="top" width="144">Revision</td>
<td valign="top">3.2.0</td>
</tr>
<tr>
<td valign="top" width="144">Authors</td>
<td valign="top">Mark Davis</td>
</tr>
<tr>
<td valign="top" width="144">Date</td>
<td valign="top">2002-03-22</td>
</tr>
<tr>
<td valign="top" width="144">This Version</td>
<td valign="top"><a href="http://www.unicode.org/Public/3.2-Update/PropList-3.2.0.html">http://www.unicode.org/Public/3.2-Update/PropList-3.2.0.html</a></td>
</tr>
<tr>
<td valign="top" width="144">Previous Version</td>
<td valign="top"><a href="http://www.unicode.org/Public/3.1-Update1/PropList-3.1.1.html">http://www.unicode.org/Public/3.1-Update1/PropList-3.1.1.html</a></td>
</tr>
<tr>
<td valign="top" width="144">Latest Version</td>
<td valign="top"><a href="http://www.unicode.org/Public/UNIDATA/PropList.html">http://www.unicode.org/Public/UNIDATA/PropList.html</a></td>
</tr>
</tbody>
</table>
<h3><i><br>
Summary</i></h3>
<blockquote>
<p><i>This document describes the format and content of the PropList.txt
data file in the Unicode Character Database (UCD).</i></p>
</blockquote>
<h3><i>Status</i></h3>
<blockquote>
<p><i>The file and the files described herein are part of the Unicode
Character Database and governed by the <a href="#UCD_Terms">UCD Terms of Use</a>
given below.</i></p>
<p><i>For general information on file formats and table formats, and the
implications of normative vs informative properties, see
UnicodeCharacterDatabase.html.</i></p>
<p><i><b>Warning: </b>the information in this file does not completely
describe the use and interpretation of Unicode character properties and
behavior. It must be used in conjunction with the data in the other files in
the Unicode Character Database, and relies on the notation and definitions
supplied in <a href="http://www.unicode.org/standard/standard.html">The
Unicode Standard</a>. All chapter references are to Version 3.2.0 of the
standard unless otherwise indicated.</i></p>
</blockquote>
<hr width="50%">
<h2>Introduction</h2>
<p align="left">PropList.txt contains extended properties that supplement the
General Category property described in UnicodeData.html. Unlike the derived
properties, the properties in PropList.txt cannot be derived directly from
UnicodeData.txt or other data files of the UCD. These properties are listed in
the following table.</p>
<p align="center"><i>All properties in this file are binary.</i></p>
<blockquote>
<p align="left"><b>Note: </b>The properties of the form Other_XXX are used
to generate properties in DerivedCoreProperties.txt. They are not intended
for general use, such as in APIs that return property values.</p>
</blockquote>
<div align="center">
<center>
<table border="1" cellspacing="0" cellpadding="3" class="smallText">
<tr>
<th>Property Value</th>
<th>N/I</th>
<th>Definition and Usage</th>
</tr>
<tr>
<th valign="top" align="left">White_space</th>
<th valign="top">N</th>
<td valign="top">Space characters and those format control characters
(such as TAB, CR and LF) which should be treated by programming
languages as "white space" for the purpose of parsing
elements.
<p><b>Note:</b> ZERO WIDTH SPACE and ZERO WIDTH NO-BREAK SPACE are not
included, since their functions are restricted to line-break control.
Their names are unfortunately misleading in this respect.</p>
<p><b>Note: </b>There are other senses of "whitespace" that
encompass a different set of characters.</p>
</td>
</tr>
<tr>
<th valign="top" align="left">Bidi_Control</th>
<th valign="top">N</th>
<td valign="top">Those format control characters which have specific
functions in the Bidirectional Algorithm.</td>
</tr>
<tr>
<th valign="top" align="left">Join_Control</th>
<th valign="top">N</th>
<td valign="top">Those format control characters which have specific
functions for control of cursive joining and ligation.</td>
</tr>
<tr>
<th valign="top" align="left">ASCII_Hex_Digit</th>
<th valign="top">N</th>
<td valign="top">ASCII characters commonly used for the representation
of hexadecimal numbers.</td>
</tr>
<tr>
<th valign="top" align="left">Dash</th>
<th valign="top">I</th>
<td valign="top">Those punctuation characters explicitly called out as
dashes in the Unicode Standard, plus compatibility equivalents to
those. Most of these have the Pd General Category, but some have the
Sm General Category because of their use in mathematics.</td>
</tr>
<tr>
<th valign="top" align="left">Hyphen</th>
<th valign="top">I</th>
<td valign="top">Those dashes used to mark connections between pieces of
words, plus the Katakana middle dot. The Katakana middle dot functions
like a hyphen, but is shaped like a dot rather than a dash.</td>
</tr>
<tr>
<th valign="top" align="left">Quotation_Mark</th>
<th valign="top">I</th>
<td valign="top">Those punctuation characters that function as quotation
marks.</td>
</tr>
<tr>
<th valign="top" align="left">Terminal_Punctuation</th>
<th valign="top">I</th>
<td valign="top">Those punctuation characters that generally mark the
end of textual units.</td>
</tr>
<tr>
<th valign="top" align="left">Other_Math</th>
<th valign="top">I</th>
<td valign="top">Used in deriving the Math property.</td>
</tr>
<tr>
<th valign="top" align="left">Hex_Digit</th>
<th valign="top">I</th>
<td valign="top">Characters commonly used for the representation of
hexadecimal numbers, plus their compatibility equivalents.</td>
</tr>
<tr>
<th valign="top" align="left">Other_Alphabetic</th>
<th valign="top">I</th>
<td valign="top">Used in deriving the Alphabetic property.</td>
</tr>
<tr>
<th valign="top" align="left">Ideographic</th>
<th valign="top">I</th>
<td valign="top">Characters considered to be CJKV (Chinese, Japanese,
Korean, and Vietnamese) ideographs.</td>
</tr>
<tr>
<th valign="top" align="left">Diacritic</th>
<th valign="top">I</th>
<td valign="top">Characters that linguistically modify the meaning of
another character to which they apply. Some diacritics are not
combining characters, and some combining characters are not
diacritics.</td>
</tr>
<tr>
<th valign="top" align="left">Extender</th>
<th valign="top">I</th>
<td valign="top">Characters whose principal function is to extend the
value or shape of a preceding alphabetic character. Typical of these
are length and iteration marks.</td>
</tr>
<tr>
<th valign="top" align="left">Other_Lowercase</th>
<th valign="top">I</th>
<td valign="top">Used in deriving the Lowercase property.</td>
</tr>
<tr>
<th valign="top" align="left">Other_Uppercase</th>
<th valign="top">I</th>
<td valign="top">Used in deriving the Uppercase property.</td>
</tr>
<tr>
<th valign="top" align="left">Noncharacter_Code_Point</th>
<th valign="top">N</th>
<td valign="top">Code points that are explicitly defined as illegal for
the encoding of characters. See <a href="http://www.unicode.org/unicode/reports/tr27/">Unicode
3.1</a> for more information.</td>
</tr>
<tr>
<th valign="top" align="left">Other_Grapheme_Extend</th>
<th valign="top">N</th>
<td valign="top">Used in deriving the Grapheme_Extend property.</td>
</tr>
<tr>
<th valign="top" align="left">Grapheme_Link</th>
<th valign="top">N</th>
<td valign="top">Used in determining default grapheme cluster
boundaries.
<p>For more information, see <a href="http://www.unicode.org/unicode/reports/tr29/">UTR
#29: Text Boundaries</a> (in proposed draft status at publication of
Unicode 3.2).</td>
</tr>
<tr>
<th valign="top" align="left">IDS_Binary_Operator<br>
IDS_Trinary_Operator<br>
Radical<br>
Unified_Ideograph</th>
<th valign="top">N</th>
<td valign="top">For a machine-readable list of Ideographic Description
Sequences.
<p>For more information, see <a href="http://www.unicode.org/unicode/reports/tr28/">Unicode
3.2</a>.</td>
</tr>
<tr>
<th valign="top" align="left">Other_Default_Ignorable_Code_Point</th>
<th valign="top">N</th>
<td valign="top">Used in deriving the Default_Ignorable_Code_Point
property.</td>
</tr>
<tr>
<th valign="top" align="left">Deprecated</th>
<th valign="top">N</th>
<td valign="top">For a machine-readable list of deprecated characters.
No characters will ever be removed from the standard, but the usage of
deprecated characters is strongly discouraged.
<p>For more information, see <a href="http://www.unicode.org/unicode/reports/tr28/">Unicode
3.2</a>.</td>
</tr>
<tr>
<th valign="top" align="left">Soft_Dotted</th>
<th valign="top">N</th>
<td valign="top">Characters with a "soft dot", like <i>i</i>
or <i>j.</i> An accent placed on these characters causes the dot to
disappear. An explicit <i>dot above</i> can be added where required,
such as in Lithuanian.
<p>For more information, see <a href="http://www.unicode.org/unicode/uni2book/ch07.pdf">Unicode
3.0, Chapter 7</a>, <i>Diacritics on i and j</i></td>
</tr>
<tr>
<th valign="top" align="left">Logical_Order_Exception</th>
<th valign="top">N</th>
<td valign="top">There are a small number of characters that do not use
logical order. These characters require special handling in most
processing.
<p>For more information, see <a href="http://www.unicode.org/unicode/reports/tr28/">Unicode
3.2</a>.</td>
</tr>
</table>
</center>
</div>
<h2><i><a name="UCD_Terms"><br>
UCD Terms of Use</a></i></h2>
<h3><i>Disclaimer</i></h3>
<blockquote>
<p><i>The Unicode Character Database is provided as is by Unicode, Inc. No
claims are made as to fitness for any particular purpose. No warranties of
any kind are expressed or implied. The recipient agrees to determine
applicability of information provided. If this file has been purchased on
magnetic or optical media from Unicode, Inc., the sole remedy for any claim
will be exchange of defective media within 90 days of receipt.</i></p>
<p><i>This disclaimer is applicable for all other data files accompanying
the Unicode Character Database, some of which have been compiled by the
Unicode Consortium, and some of which have been supplied by other sources.</i></p>
</blockquote>
<h3><i>Limitations on Rights to Redistribute This Data</i></h3>
<blockquote>
<p><i>Recipient is granted the right to make copies in any form for internal
distribution and to freely use the information supplied in the creation of
products supporting the Unicode<sup>TM</sup> Standard. The files in the
Unicode Character Database can be redistributed to third parties or other
organizations (whether for profit or not) as long as this notice and the
disclaimer notice are retained. Information can be extracted from these
files and used in documentation or programs, as long as there is an
accompanying notice indicating the source.</i></p>
</blockquote>
<hr width="50%">
<p align="center"><a href="http://www.unicode.org/unicode/copyright.html"><img src="http://www.unicode.org/img/hb_home.gif" border="0" alt="Home" width="40" height="49"><img src="http://www.unicode.org/img/hb_mid.gif" border="0" alt="Terms of Use" width="152" height="49"><img src="http://www.unicode.org/img/hb_mail.gif" border="0" alt="E-mail" width="46" height="49"></a>
</blockquote>
</body>
</html>