1.1 --- a/css-style-attr/Overview.src.html Tue Jan 05 16:56:03 2010 +0000
1.2 +++ b/css-style-attr/Overview.src.html Thu Jan 07 08:25:14 2010 +0000
1.3 @@ -2,7 +2,7 @@
1.4 <html lang="en">
1.5 <head>
1.6 <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
1.7 - <title>CSS Style Attribute Syntax Level 1</title>
1.8 + <title>CSS Styling Attribute Syntax Level 1</title>
1.9 <link rel="stylesheet" type="text/css" href="../default.css">
1.10
1.11 <link rel="stylesheet" type="text/css" href="http://www.w3.org/StyleSheets/TR/W3C-ED">
1.12 @@ -11,7 +11,7 @@
1.13 <div class="head">
1.14 <!--logo-->
1.15
1.16 -<h1>CSS Style Attribute Syntax Level 1</h1>
1.17 +<h1>CSS Styling Attribute Syntax Level 1</h1>
1.18
1.19 <h2 class="no-num no-toc">[LONGSTATUS] [DATE]</h2>
1.20 <dl>
1.21 @@ -38,10 +38,10 @@
1.22
1.23 <h2 class="no-num no-toc" id="abstract">Abstract</h2>
1.24
1.25 -<p>Markup languages such as HTML and SVG provide a "style" attribute on most
1.26 +<p>Markup languages such as HTML and SVG provide a styling attribute on most
1.27 elements, to hold a fragment of a style sheet that applies to those elements.
1.28 One of the possible style sheet languages is CSS. This draft describes the
1.29 -syntax of the CSS fragment that can be used in the "style" attribute.
1.30 +syntax of the CSS fragment that can be used in the styling attribute.
1.31
1.32 <h2 class="no-num no-toc" id="status">Status of this document</h2>
1.33 <!--status-->
1.34 @@ -51,11 +51,11 @@
1.35
1.36 <h2 id="intro">Introduction</h2>
1.37
1.38 -<p>Several XML-based document formats have a "style" attribute to permit the
1.39 -author to directly apply style information to specific elements in documents.
1.40 -If a document format defines a "style" attribute and the attribute accepts CSS
1.41 -as its value, then this specification describes the attribute's syntax and
1.42 -interpretation.
1.43 +<p>Some document formats have a <dfn>styling attribute</dfn> to permit
1.44 +the author to directly apply style information to specific elements
1.45 +in documents. If a document format defines a styling attribute and the
1.46 +attribute accepts CSS as its value, then this specification defines this
1.47 +<dfn>CSS styling attribute</dfn>'s syntax and interpretation.
1.48
1.49 <div class="example">
1.50 <p>The following example shows the use of the <code>style</code> attribute
1.51 @@ -63,64 +63,19 @@
1.52 <pre><p style="<em>color: #090; line-height: 1.2</em>">...</p></pre>
1.53 </div>
1.54
1.55 -<h2 id="syntax">Syntax</h2>
1.56 -
1.57 -<p>The syntax of the style attribute syntax is exactly the same as the
1.58 -contents of a CSS
1.59 -<a href="http://www.w3.org/TR/CSS21/syndata.html#rule-sets">declaration block</a>.
1.60 -A close brace (<code>}</code>) in the style attribute value does not
1.61 -terminate the style data; it is merely an invalid token.
1.62 -
1.63 -<p>The same rules for forward-compatible parsing apply to the inline style
1.64 -sheet as to a normal style sheet. See <a href="http://www.w3.org/TR/CSS21/syndata.html">chapter
1.65 -4 of the CSS2.1 specification</a>. [[!CSS21]]
1.66 -
1.67 -<h2 id="grammar">Grammar</h2>
1.68 -
1.69 -<p>The syntax of the CSS fragment that is allowed in the HTML "style"
1.70 -attribute can be formally specified as follows:
1.71 -
1.72 -<pre>
1.73 -inline-stylesheet
1.74 - : S* declaration-list
1.75 - ;
1.76 -
1.77 -declaration-list
1.78 - : declaration [ ';' S* declaration ]*
1.79 - ;
1.80 -</pre>
1.81 -
1.82 -<p>Please refer to the grammar in <a href="http://www.w3.org/TR/CSS21/grammar.html">appendix D
1.83 -of the CSS2.1 specification</a> [[!CSS21]] for the definition of the symbols
1.84 -not defined here.
1.85 -
1.86 -<h2 id="interpret">Cascading and Interpretation</h2>
1.87 -
1.88 -<p>The declarations in a style attribute apply to the element to which
1.89 -the attribute belongs. CSS2.1 <a href="/TR/CSS21/cascade.html#specificity">defines</a>
1.90 -how style sheets and "style" attributes are cascaded together. [[!CSS21]]
1.91 -Aside from the differences in cascading, the declarations in a style
1.92 -attribute must be interpreted exactly as if they were given in a CSS
1.93 -style rule applied to the element.
1.94 -
1.95 -<p>The CSS Working Group strongly recommends that document languages do
1.96 -not allow multiple style attributes on a single element. If a document
1.97 -language allows multiple style attributes, each is parsed independently
1.98 -and treated as a separate style rule, the ordering of which should be
1.99 -defined by the document language, else is undefined.
1.100 -
1.101 <h2 id="conformance">Conformance</h2>
1.102
1.103 -<p>A document or implementation cannot conform to CSS Style Attribute Syntax
1.104 -Level 1 alone, but can claim conformance to CSS Style Attribute Syntax Level 1
1.105 +<p>A document or implementation cannot conform to CSS Styling Attribute Syntax
1.106 +Level 1 alone, but can claim conformance to CSS Styling Attribute Syntax Level 1
1.107 if it satisfies the conformance requirements in this specification when
1.108 -implementing CSS together with style attribute handling as defined in a
1.109 -document language that has style attributes.</p>
1.110 +implementing CSS together with styling attribute handling as defined in a
1.111 +document language that has CSS styling attributes.</p>
1.112
1.113 -<p>Conformance to CSS Style Attribute Syntax Level 1 is defined for two classes:
1.114 +<p>Conformance to CSS Styling Attribute Syntax Level 1 is defined for two
1.115 +classes:
1.116 <dl>
1.117 <dt><dfn>document</dfn></dt>
1.118 - <dd>A document represented in a document language that defines a style
1.119 + <dd>A document represented in a document language that defines a styling
1.120 attribute for one or more of its elements.
1.121 <dt><dfn>interpreter</dfn></dt>
1.122 <dd>Someone or something that interprets the semantics of a document and
1.123 @@ -152,6 +107,59 @@
1.124
1.125 <p class="note">Note, this is an informative note.</p>
1.126
1.127 +<h2 id="syntax">Syntax and Parsing</h2>
1.128 +
1.129 +<p>The value of the styling attribute must match the syntax of the contents of
1.130 +a CSS <a href="http://www.w3.org/TR/CSS21/syndata.html#rule-sets">declaration
1.131 +block</a>. The interpreter must parse the styling attribute's value using the
1.132 +same forward-compatible parsing rules that apply to parsing declaration block
1.133 +contents in a normal CSS style sheet. See
1.134 +<a href="http://www.w3.org/TR/CSS21/syndata.html">chapter 4 of the CSS2.1
1.135 +specification</a>. [[!CSS21]]
1.136 +
1.137 +<p class="note">Note that because there is no open brace delimiting the
1.138 +declaration list in the CSS styling attribute syntax, a close brace
1.139 +(<code>}</code>) in the styling attribute's value does not terminate the
1.140 +style data: it is merely an invalid token.</p>
1.141 +
1.142 +<h2 id="grammar">Grammar</h2>
1.143 +
1.144 +<p>The syntax of the CSS fragment that is allowed as the CSS styling
1.145 +attribute's value is formally specified as follows:
1.146 +
1.147 +<pre>
1.148 +inline-stylesheet
1.149 + : S* declaration-list
1.150 + ;
1.151 +
1.152 +declaration-list
1.153 + : declaration [ ';' S* declaration ]*
1.154 + ;
1.155 +</pre>
1.156 +
1.157 +<p>Please refer to the grammar in <a href="http://www.w3.org/TR/CSS21/grammar.html">appendix D
1.158 +of the CSS2.1 specification</a> [[!CSS21]] for the definition of the symbols
1.159 +not defined here.
1.160 +
1.161 +<h2 id="interpret">Cascading and Interpretation</h2>
1.162 +
1.163 +<p>The declarations in a styling attribute apply to the element to which
1.164 +the attribute belongs. CSS2.1 <a href="/TR/CSS21/cascade.html#specificity">defines</a>
1.165 +how style sheets and styling attributes are cascaded together. [[!CSS21]]
1.166 +Relative URLs in the style data must be resolved relative to the styling
1.167 +attribute's element (or to the document if per-element resolution is not
1.168 +defined).
1.169 +
1.170 +<p>Aside from the differences in cascading, the declarations in a styling
1.171 +attribute must be interpreted exactly as if they were given in a CSS
1.172 +style rule that applies to the element.
1.173 +
1.174 +<p>The CSS Working Group strongly recommends that document languages do
1.175 +not allow multiple CSS styling attributes on a single element. If a document
1.176 +language allows multiple CSS styling attributes, each must be parsed
1.177 +independently and treated as a separate style rule, the ordering of which
1.178 +should be defined by the document language, else is undefined.
1.179 +
1.180 <h2 id="ack">Acknowledgments</h2>
1.181
1.182 <p>Thanks to feedback from Daniel Glazman, Ian Hickson, Eric A. Meyer,
