csswg-drafts/css2/cover.src at 7657d01c1c07627e35bc2f305f8751ac0ab3c61b · w3c/csswg-drafts · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN">

<html lang="en">

<title>Cascading Style Sheets Level 2 Revision 1 (CSS&nbsp;2.1) Specification</title>

<body>
<div class="head">
  <p><a href="http://www.w3.org/"><img alt="W3C" height="48"
    src="http://www.w3.org/Icons/w3c_home" width="72"></a>

  <h1 id="title">Cascading Style Sheets Level 2 Revision 1 (CSS&nbsp;2.1) Specification</h1>
  <h2 id="W3C-doctype">W3C _THE_STATUSNAME_ _THE_DATE_</h2>

  <dl>
  <dt>This version:
  <dd><a href="_THIS_VERSION_">
               _THIS_VERSION_</a>
  <dt>Latest version:
  <dd><a href="_THE_LATEST_VERSION_">
               _THE_LATEST_VERSION_</a>
  <dt>Previous versions:
  <dd><a href="_THE_PREVIOUS_VERSION_">
               _THE_PREVIOUS_VERSION_</a>
  <dd><a href="http://www.w3.org/TR/2008/REC-CSS2-20080411/">
               http://www.w3.org/TR/2008/REC-CSS2-20080411/</a>
  <dt>Editors:
  <dd class="vcard"><a class="url fn" lang=nl href="http://www.w3.org/People/Bos/">
               Bert Bos</a>
            &lt;<span class="email">bert&nbsp;@w3.org</span>&gt;</dd>
  <dd class="vcard"><a class="url fn" lang=tr href="http://tantek.com/">
               Tantek &Ccedil;elik</a>
            &lt;<span class="email">tantek&nbsp;@cs.stanford.edu</span>&gt;</dd>
  <dd class="vcard"><a class="url fn" lang=en href="http://ian.hixie.ch/">
               Ian Hickson</a>
               &lt;<span class="email">ian&nbsp;@hixie.ch</span>&gt;</dd>
  <dd class="vcard"><a class="url fn n" lang=no href="http://people.opera.com/howcome/">
<span class="given-name">H&aring;kon</span> <span class="additional-name">Wium</span> <span class="family-name">Lie</span></a>
               &lt;<span class="email">howcome&nbsp;@opera.com</span>&gt;</dd>
  </dl>

  <p>Please refer to the <a
  href="_THE_UPDATE_DIR_/_THE_ID_-errata.html"><strong>
  errata</strong></a> for this document.

  <p>This document is also available in these non-normative formats:
  <a href="css2.txt">plain text</a>,
  <a href="css2.tgz">gzip'ed tar file</a>,
  <a href="css2.zip">zip file</a>,
  <a href="css2.ps.gz">gzip'ed PostScript</a>,
  <a href="css2.pdf">PDF</a>.
  See also <a
  href="http://www.w3.org/2005/11/Translations/Query?titleMatch=CSS;lang=any;search1=Submit"><strong>
  translations</strong></a>.

  <p class="copyright"><a
  href="http://www.w3.org/Consortium/Legal/ipr-notice#Copyright">
  Copyright</a> &copy; 2010 <a href="http://www.w3.org/"><acronym
  title="World Wide Web Consortium">W3C</acronym></a><sup>&reg;</sup>
  (<a href="http://www.csail.mit.edu/"><acronym title="Massachusetts
  Institute of Technology">MIT</acronym></a>, <a
  href="http://www.ercim.org/"><acronym title="European Research
  Consortium for Informatics and Mathematics">ERCIM</acronym></a>, <a
  href="http://www.keio.ac.jp/">Keio</a>), All Rights Reserved. W3C <a
  href="http://www.w3.org/Consortium/Legal/ipr-notice#Legal_Disclaimer">
  liability</a>, <a
  href="http://www.w3.org/Consortium/Legal/ipr-notice#W3C_Trademarks">
  trademark</a> and <a
  href="http://www.w3.org/Consortium/Legal/copyright-documents">
  document use</a> rules apply.

  <hr title="Separator from Header">
</div>

<h2 id=abstract>Abstract</h2>

<p>This specification defines Cascading Style Sheets, level&nbsp;2
revision&nbsp;1 (CSS&nbsp;2.1). CSS&nbsp;2.1 is a style sheet language
that allows
authors and users to attach style (e.g., fonts and spacing) to
structured documents (e.g., HTML documents and XML
applications). By separating the presentation style of documents from
the content of documents, CSS&nbsp;2.1 simplifies Web authoring and
site maintenance.

<P>CSS&nbsp;2.1 builds on CSS2 [[-CSS2]] which builds on CSS1 [[-CSS1]].
It supports media-specific style sheets so that authors may tailor the
presentation of their documents to visual browsers, aural devices,
printers, braille devices, handheld devices, etc. It also supports
content positioning, table layout, features for internationalization
and some properties related to user interface.

<p>CSS&nbsp;2.1 corrects a few errors in CSS2 (the most important
being a new definition of the height/width of absolutely positioned
elements, more influence for HTML's "style" attribute and a new
calculation of the 'clip' property), and adds a few highly requested
features which have already been widely implemented.
But most of all CSS&nbsp;2.1
represents a "snapshot" of CSS usage: it consists of all CSS features
that are implemented interoperably at the date of publication of the Recommendation.

<p>CSS&nbsp;2.1 is derived from and is intended to replace CSS2. Some
parts of CSS2 are unchanged in CSS&nbsp;2.1, some parts have been
altered, and some parts removed. The removed portions may be used in a
future CSS3 specification. Future specs should refer to CSS&nbsp;2.1
(unless they need features from CSS2 which have been dropped in
CSS&nbsp;2.1, and then they should only reference CSS2 for those
features, or preferably reference such feature(s) in the respective
CSS3 Module that includes those feature(s)).

<h2 id=status>Status of this document</h2>

<p><em>This section describes the status of this document at the time
of its publication. Other documents may supersede this document. A
list of current W3C publications and the latest revision of this
technical report can be found in the <a
href="http://www.w3.org/TR/">W3C technical reports index at
http://www.w3.org/TR/.</a></em></p>

<p>Publication as a Proposed Recommendation does not imply endorsement
by the W3C Membership. This is a draft document and may be updated,
replaced or obsoleted by other documents at any time. It is
inappropriate to cite this document as other than work in progress.

<p>The (<a
href="http://lists.w3.org/Archives/Public/www-style/">archived</a>)
public mailing list <a
href="mailto:www-style@w3.org">www-style@w3.org</a> (see <a
href="http://www.w3.org/Mail/Request">instructions</a>) is preferred
for discussion of this specification. When sending e-mail, please put
the text &#8220;CSS21&#8221; in the subject, preferably like
this: &#8220;[CSS21] <em>&hellip;summary of
comment&hellip;</em>&#8221;</p>

<p>This document was produced by the <a
href="http://www.w3.org/Style/CSS/members">CSS Working Group</a> (part
of the <a href="http://www.w3.org/Style/">Style Activity</a>).

<p>This document was produced by a group operating under
the <a href="http://www.w3.org/Consortium/Patent-Policy-20040205/">5 February 2004 W3C
Patent Policy</a>. W3C maintains a <a rel="disclosure"
href="http://www.w3.org/2004/01/pp-impl/32061/status">public list of any
patent disclosures</a> made in connection with the deliverables of the
group; that page also includes instructions for disclosing a patent.
An individual who has actual knowledge of a patent which the
individual believes
contains <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/#def-essential">Essential
Claim(s)</a> must disclose the information in accordance
with <a
href="http://www.w3.org/Consortium/Patent-Policy-20040205/#sec-Disclosure">section 6 of
the W3C Patent Policy</a>.</p>

<p>The Working Group has created a <a href="/Style/CSS/Test/">test
suite</a> and
an <a href="/Style/CSS/Test/CSS2.1/20110323/reports/">implementation
report.</a>

<!--NewPage--><!-- this is for html2ps -->
<div class="toc">
<h2><a name="minitoc">Quick Table of Contents</a></h2>
<!-- #include src="minicontents.srb" -->
</div>

<!--NewPage--><!-- this is for html2ps -->
<div class="toc">
<h2><a name="toc">Full Table of Contents</a></h2>
<!-- #include src="contents.srb" -->
</div>

</body>
</html>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-declaration:"~/SGML/HTML4.dcl"
sgml-default-doctype-name:"html"
sgml-minimize-attributes:t
sgml-nofill-elements:("pre" "style" "br")
sgml-live-element-indicator:t
End:
-->