css-style-attr/Overview.src.html@41226843561b
css-style-attr/Overview.src.html
Fri, 03 Sep 2010 00:33:34 +0000
- author
- Elika Etemad <fantasai.cvs@inkedblade.net>
- date
- Fri, 03 Sep 2010 00:33:34 +0000
- changeset 1953
- 41226843561b
- parent 1915
- ca4cd8044f3f
- child 1958
- 95fb75eb6487
- permissions
- -rwxr-xr-x
Add CR exit criteria
1 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
2 <html lang="en">
3 <head>
4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
5 <title>CSS Styling Attributes Level 1</title>
6 <link rel="stylesheet" type="text/css" href="default.css">
8 <link rel="stylesheet" type="text/css" href="http://www.w3.org/StyleSheets/TR/W3C-ED">
9 </head>
11 <div class="head">
12 <!--logo-->
14 <h1>CSS Styling Attributes Level 1</h1>
16 <h2 class="no-num no-toc">[LONGSTATUS] [DATE]</h2>
17 <dl>
18 <dt>This version:</dt>
19 <!-- <dd><dd><a href="http://www.w3.org/TR/[YEAR]/WD-css-style-attr-[CDATE]/">http://www.w3.org/TR/[YEAR]/WD-css-style-attr-[CDATE]/</a></dd> -->
20 <dd><a href="http://dev.w3.org/csswg/css-style-attr/">http://dev.w3.org/csswg/css-style-attr/</a>
21 </dd>
22 <dt>Latest version:
23 <dd><a href="http://www.w3.org/TR/css-style-attr">http://www.w3.org/TR/css-style-attr</a>
24 <dt>Previous version:
25 <dd><a href="http://www.w3.org/TR/2010/WD-css-style-attr-20100121/">http://www.w3.org/TR/2010/WD-css-style-attr-20100121/</a>
26 <dt>Editors:
27 <dd class="vcard"><a lang="tr" class="fn url" href="http://tantek.com/">Tantek Çelik</a>
28 (<span class="company role url">invited expert</span>,
29 and before at <a href="http://www.microsoft.com/">Microsoft Corporation</a>)
30 <<a class="email"
31 href="mailto:tantek@cs.stanford.edu">tantek@cs.stanford.edu</a>>
32 </dd>
33 <dd class="vcard"><a class="fn n url" href="http://fantasai.inkedblade.net/contact"><span class="given-name">Elika</span> <abbr class="additional-name">J.</abbr> <span class="family-name">Etemad</span></a> (<span class="company role">invited expert</span>)
34 </dd>
35 <dt>Previous Editors:
36 <dd class="vcard"><a class="fn url" href="http://www.w3.org/People/Bos/">Bert Bos</a> (<a class="org" href="http://www.w3.org/">W3C</a>), <<a class="email" href="mailto:bert@w3.org">bert@w3.org</a>>
37 </dd>
38 <dd class="vcard"><span class="fn">Marc Attinasi</span> (<span class="org">AOL/Netscape</span>), <<a class="email" href="mailto:attinasi@netscape.com">attinasi@netscape.com</a>>
39 </dd>
40 </dl>
41 <!--begin-copyright-->
42 <p>[Here will be included the file "../copyright.inc"]</p>
43 <!--end-copyright-->
45 <hr title="Separator for header">
46 </div>
48 <h2 class="no-num no-toc" id="abstract">Abstract</h2>
50 <p>Markup languages such as HTML [[HTML401]] and SVG [[SVG11]] provide a styling
51 attribute on most elements, to hold inline style information that applies
52 to those elements. One of the possible style sheet languages is CSS. This
53 draft describes the syntax and interpretation of the CSS fragment that can
54 be used in such styling attributes.
56 <h2 class="no-num no-toc" id="status">Status of this document</h2>
57 <!--status-->
58 <p>For this specification to exit the CR stage, the following conditions
59 shall be met:
61 <ol>
62 <li>
63 <p>There must be at least two interoperable implementations. For the
64 purposes of this criterion, we define the following terms:</p>
66 <dl>
67 <dt>interoperable
69 <dd>
70 <p>passing the respective test case(s) in the <a
71 href="http://www.w3.org/Style/CSS/Test/">CSS test suite</a>, or, if
72 the implementation is not a Web browser, an equivalent test. Every
73 relevant test in the test suite should have an equivalent test created
74 if such a user agent (UA) is to be used to claim interoperability. In
75 addition if such a UA is to be used to claim interoperability, then
76 there must one or more additional UAs which can also pass those
77 equivalent tests in the same way for the purpose of interoperability.
78 The equivalent tests must be made publicly available for the purposes
79 of peer review.</p>
81 <dt>implementation
83 <dd>
84 <p>a user agent which:</p>
86 <ol>
87 <li>implements the specification.
89 <li>is available (i.e. publicly downloadable or available through some
90 other public point of sale mechanism). This is the "show me"
91 requirement.
93 <li>is shipped, or is a "nightly build" (i.e., a development version
94 for the next release), but is not experimental (i.e., a version
95 specifically designed to pass the test suite and not intended for
96 daily usage going forward).
97 </ol>
98 </dl>
100 <li>
101 <p>A minimum of three months of the CR period must elapse. That
102 is, this specification will not exit CR before XXX INSERT DATE HERE. When the
103 specification exits CR, an implementation report will be published. At
104 this point, no such report exists.</p>
105 </ol>
107 <p>A CSS Styling Attribute <a href="http://www.w3.org/Style/CSS/Test/">Test
108 Suite</a> will be developed during the Candidate Recommendation phase of
109 this CSS Styling Attribute specification.
111 <h2 class="no-num no-toc" id="contents">Table of contents</h2>
112 <!--toc-->
114 <h2 id="intro">Introduction</h2>
116 <p>Some document formats have a <dfn>styling attribute</dfn> to permit
117 the author to directly apply style information to specific elements
118 in documents. If a document format defines a styling attribute and the
119 attribute accepts CSS as its value, then this specification defines that
120 <dfn>CSS styling attribute</dfn>’s syntax and interpretation.
122 <div class="example">
123 <p>The following example shows the use of the <code>style</code> attribute
124 in HTML [[HTML401]]:</p>
125 <pre><p style="<em>color: #090; line-height: 1.2</em>">...</p></pre>
126 </div>
128 <h2 id="conformance">Conformance</h2>
130 <p>A document or implementation cannot conform to CSS Styling Attributes
131 Level 1 alone, but can claim conformance to CSS Styling Attributes Level 1
132 if it satisfies the conformance requirements in this specification when
133 implementing CSS together with styling attribute handling as defined in a
134 document language that has CSS styling attributes.</p>
136 <p>Conformance to CSS Styling Attributes Level 1 is defined for two
137 classes:
138 <dl>
139 <dt><dfn>document</dfn></dt>
140 <dd>A document represented in a document language that defines a styling
141 attribute for one or more of its elements.
142 <dt><dfn>interpreter</dfn></dt>
143 <dd>Someone or something that interprets the semantics of a document and
144 its associated style information.
145 (Most CSS <a href="http://www.w3.org/TR/CSS21/conform.html#user-agent">user
146 agents</a> fall under this category.)</dd>
147 </dl>
149 <p>The conformance requirements are expressed with a combination of
150 descriptive assertions and RFC 2119 terminology. The key words "MUST",
151 "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT",
152 "RECOMMENDED", "MAY", and "OPTIONAL" in the normative parts of this
153 document are to be interpreted as described in RFC 2119.
154 However, for readability, these words do not appear in all uppercase
155 letters in this specification. All of the text of this specification is
156 normative except sections explicitly marked as non-normative, examples,
157 and notes. [[!RFC2119]]</p>
159 <p>Examples in this specification are introduced with the words "for example"
160 or are set apart from the normative text with <code>class="example"</code>,
161 like this:
163 <div class="example">
164 <p>This is an example of an informative example.</p>
165 </div>
167 <p>Informative notes begin with the word "Note" and are set apart from the
168 normative text with <code>class="note"</code>, like this:
170 <p class="note">Note, this is an informative note.</p>
172 <h2 id="syntax">Syntax and Parsing</h2>
174 <p>The value of the styling attribute must match the syntax of the contents of
175 a CSS <a href="http://www.w3.org/TR/CSS21/syndata.html#rule-sets">declaration
176 block</a> (excluding the delimiting braces), whose formal grammar is given
177 below in the terms and conventions of the
178 <a href="http://www.w3.org/TR/CSS21/syndata.html#syntax">CSS core grammar</a>:
180 <pre>
181 declaration-list
182 : S* declaration? [ ';' S* declaration? ]*
183 ;
184 </pre>
186 <p class="note">Note that following the CSS2.1 convention, comment tokens
187 are not shown in the rule above.
189 <p>The interpreter must parse the styling attribute's value using the
190 same forward-compatible parsing rules that apply to parsing declaration block
191 contents in a normal CSS style sheet. See
192 <a href="http://www.w3.org/TR/CSS21/syndata.html">chapter 4 of the CSS2.1
193 specification</a> for details. [[!CSS21]]
195 <p class="note">Note that because there is no open brace delimiting the
196 declaration list in the CSS styling attribute syntax, a close brace
197 (<code>}</code>) in the styling attribute's value does not terminate the
198 style data: it is merely an invalid token.</p>
200 <h2 id="interpret">Cascading and Interpretation</h2>
202 <p>The declarations in a styling attribute apply to the element to which
203 the attribute belongs. In the cascade, these declarations are considered
204 to have author origin and a specificity higher than any selector.
205 CSS2.1 <a href="http://www.w3.org/TR/CSS21/cascade.html#specificity">defines</a>
206 how style sheets and styling attributes are cascaded together. [[!CSS21]]
207 Relative URLs in the style data must be resolved relative to the styling
208 attribute's element (or to the document if per-element resolution is not
209 defined) when the attribute's value is parsed<!-- so dynamic changes to
210 the base URL don't affect the CSS ~Hixie -->.
212 <p>Aside from the differences in cascading, the declarations in a styling
213 attribute must be interpreted exactly as if they were given in a CSS
214 style rule that applies to the element.
216 <p>The CSS Working Group strongly recommends that document languages do
217 not allow multiple CSS styling attributes on a single element. If a document
218 language allows multiple CSS styling attributes, each must be parsed
219 independently and treated as a separate style rule, the ordering of which
220 should be defined by the document language, else is undefined.
222 <h2 id="ack">Acknowledgments</h2>
224 <p>Thanks to feedback from <span class="vcard"><span class="fn">Daniel Glazman</span></span>, <span class="vcard"><span class="fn">Ian Hickson</span></span>, <span class="vcard"><span class="fn n"><span class="given-name">Eric</span> <abbr class="additional-name">A.</abbr> <span class="family-name">Meyer</span></span></span>,
225 <span class="vcard"><span class="fn">Björn Höhrmann</span></span>.
226 </p>
228 <h2 id="references">References
230 <h3 class="no-num" id="normative-references">Normative references</h3>
232 <!--begin-normative-->
233 <p>[Here will be inserted the file "normative.inc"]</p>
234 <!--end-normative-->
236 <h3 class="no-num" id="informative-references">Informative references</h3>
238 <!--begin-informative-->
239 <p>[Here will be inserted the file "informative.inc"]</p>
240 <!--end-informative-->
242 </body>
243 </html>
244 <!-- Keep this comment at the end of the file
245 Local variables:
246 mode: sgml
247 sgml-declaration:"~/SGML/HTML4.decl"
248 sgml-default-doctype-name:"html"
249 sgml-minimize-attributes:t
250 sgml-nofill-elements:("pre" "style" "br")
251 End:
252 -->
