drafts: css-style-attr/Overview.src.html@ca4cd8044f3f (annotated)

css-style-attr/Overview.src.html@ca4cd8044f3f (annotated)

css-style-attr/Overview.src.html

Tue, 24 Aug 2010 11:11:17 +0000

author: Elika Etemad <fantasai.cvs@inkedblade.net>
date: Tue, 24 Aug 2010 11:11:17 +0000
changeset 1915: ca4cd8044f3f
parent 1912: 197c9052da1e
child 1953: 41226843561b
permissions: -rwxr-xr-x

Clarify that declaration block contents doesn't include declaration block delimiters

 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN">
 <html lang="en">
 <head>
   <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
   <title>CSS Styling Attributes Level 1</title>
   <link rel="stylesheet" type="text/css" href="default.css">
   <link rel="stylesheet" type="text/css" href="http://www.w3.org/StyleSheets/TR/W3C-ED">
 </head>
 <div class="head">
 <!--logo-->
 <h1>CSS Styling Attributes Level 1</h1>
 <h2 class="no-num no-toc">[LONGSTATUS] [DATE]</h2>
 <dl>
   <dt>This version:</dt>
     <!-- <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> -->
     <dd><a href="http://dev.w3.org/csswg/css-style-attr/">http://dev.w3.org/csswg/css-style-attr/</a>
     </dd>
   <dt>Latest version:
     <dd><a href="http://www.w3.org/TR/css-style-attr">http://www.w3.org/TR/css-style-attr</a>
   <dt>Previous version:
     <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>
   <dt>Editors:
     <dd class="vcard"><a lang="tr" class="fn url" href="http://tantek.com/">Tantek &Ccedil;elik</a>
 (<span class="company role url">invited expert</span>,
 and before at <a href="http://www.microsoft.com/">Microsoft Corporation</a>)
      &lt;<a class="email"
 href="mailto:tantek@cs.stanford.edu">tantek@cs.stanford.edu</a>&gt;
     </dd>
     <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>)
     </dd>
   <dt>Previous Editors:
     <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>), &lt;<a class="email" href="mailto:bert@w3.org">bert@w3.org</a>&gt;
     </dd>
     <dd class="vcard"><span class="fn">Marc Attinasi</span> (<span class="org">AOL/Netscape</span>), &lt;<a class="email" href="mailto:attinasi@netscape.com">attinasi@netscape.com</a>&gt;
     </dd>
 </dl>
 <!--begin-copyright-->
 <p>[Here will be included the file "../copyright.inc"]</p>
 <!--end-copyright-->
 <hr title="Separator for header">
 </div>
 <h2 class="no-num no-toc" id="abstract">Abstract</h2>
 <p>Markup languages such as HTML [[HTML401]] and SVG [[SVG11]] provide a styling
 attribute on most elements, to hold inline style information that applies
 to those elements. One of the possible style sheet languages is CSS. This
 draft describes the syntax and interpretation of the CSS fragment that can
 be used in such styling attributes.
 <h2 class="no-num no-toc" id="status">Status of this document</h2>
 <!--status-->
   <p>This specification is a <strong>Last Call Working Draft</strong>. All
    persons are encouraged to review this document and <strong>send comments
    to the <a
    href="http://lists.w3.org/Archives/Public/www-style/">www-style</a>
    mailing list</strong> as described above. The <strong>deadline for
    comments</strong> is <strong>9 February 2010</strong>.
   <p>A CSS Styling Attribute <a href="http://www.w3.org/Style/CSS/Test/">Test
    Suite</a> will be developed during the Candidate Recommendation phase of
    this CSS Styling Attribute specification.
 <h2 class="no-num no-toc" id="contents">Table of contents</h2>
 <!--toc-->
 <h2 id="intro">Introduction</h2>
 <p>Some document formats have a <dfn>styling attribute</dfn> to permit
 the author to directly apply style information to specific elements
 in documents. If a document format defines a styling attribute and the
 attribute accepts CSS as its value, then this specification defines that
 <dfn>CSS styling attribute</dfn>&rsquo;s syntax and interpretation.
 <div class="example">
   <p>The following example shows the use of the <code>style</code> attribute
   in HTML [[HTML401]]:</p>
   <pre>&lt;p style="<em>color: #090; line-height: 1.2</em>"&gt;...&lt;/p&gt;</pre>
 </div>
 <h2 id="conformance">Conformance</h2>
 <p>A document or implementation cannot conform to CSS Styling Attributes
 Level 1 alone, but can claim conformance to CSS Styling Attributes Level 1
 if it satisfies the conformance requirements in this specification when
 implementing CSS together with styling attribute handling as defined in a
 document language that has CSS styling attributes.</p>
 <p>Conformance to CSS Styling Attributes Level 1 is defined for two
 classes:
 <dl>
   <dt><dfn>document</dfn></dt>
     <dd>A document represented in a document language that defines a styling
       attribute for one or more of its elements.
   <dt><dfn>interpreter</dfn></dt>
     <dd>Someone or something that interprets the semantics of a document and
       its associated style information.
       (Most CSS <a href="http://www.w3.org/TR/CSS21/conform.html#user-agent">user
       agents</a> fall under this category.)</dd>
 </dl>
 <p>The conformance requirements are expressed with a combination of
   descriptive assertions and RFC 2119 terminology. The key words "MUST",
   "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT",
   "RECOMMENDED", "MAY", and "OPTIONAL" in the normative parts of this
   document are to be interpreted as described in RFC 2119.
   However, for readability, these words do not appear in all uppercase
   letters in this specification. All of the text of this specification is
   normative except sections explicitly marked as non-normative, examples,
   and notes. [[!RFC2119]]</p>
 <p>Examples in this specification are introduced with the words "for example"
   or are set apart from the normative text with <code>class="example"</code>,
   like this:
 <div class="example">
   <p>This is an example of an informative example.</p>
 </div>
 <p>Informative notes begin with the word "Note" and are set apart from the
   normative text with <code>class="note"</code>, like this:
 <p class="note">Note, this is an informative note.</p>
 <h2 id="syntax">Syntax and Parsing</h2>
 <p>The value of the styling attribute must match the syntax of the contents of
 a CSS <a href="http://www.w3.org/TR/CSS21/syndata.html#rule-sets">declaration
 block</a> (excluding the delimiting braces), whose formal grammar is given
 below in the terms and conventions of the
 <a href="http://www.w3.org/TR/CSS21/syndata.html#syntax">CSS core grammar</a>:
 <pre>
 declaration-list
   : S* declaration? [ ';' S* declaration? ]*
   ;
 </pre>
 <p class="note">Note that following the CSS2.1 convention, comment tokens
 are not shown in the rule above.
 <p>The interpreter must parse the styling attribute's value using the
 same forward-compatible parsing rules that apply to parsing declaration block
 contents in a normal CSS style sheet. See
 <a href="http://www.w3.org/TR/CSS21/syndata.html">chapter 4 of the CSS2.1
 specification</a> for details. [[!CSS21]]
 <p class="note">Note that because there is no open brace delimiting the
 declaration list in the CSS styling attribute syntax, a close brace
 (<code>}</code>) in the styling attribute's value does not terminate the
 style data: it is merely an invalid token.</p>
 <h2 id="interpret">Cascading and Interpretation</h2>
 <p>The declarations in a styling attribute apply to the element to which
 the attribute belongs. In the cascade, these declarations are considered
 to have author origin and a specificity higher than any selector.
 CSS2.1 <a href="http://www.w3.org/TR/CSS21/cascade.html#specificity">defines</a>
 how style sheets and styling attributes are cascaded together. [[!CSS21]]
 Relative URLs in the style data must be resolved relative to the styling
 attribute's element (or to the document if per-element resolution is not
 defined) when the attribute's value is parsed<!-- so dynamic changes to
 the base URL don't affect the CSS ~Hixie -->.
 <p>Aside from the differences in cascading, the declarations in a styling
 attribute must be interpreted exactly as if they were given in a CSS
 style rule that applies to the element.
 <p>The CSS Working Group strongly recommends that document languages do
 not allow multiple CSS styling attributes on a single element. If a document
 language allows multiple CSS styling attributes, each must be parsed
 independently and treated as a separate style rule, the ordering of which
 should be defined by the document language, else is undefined.
 <h2 id="ack">Acknowledgments</h2>
 <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>,
 <span class="vcard"><span class="fn">Bj&ouml;rn H&ouml;hrmann</span></span>.
 </p>
 <h2 id="references">References
 <h3 class="no-num" id="normative-references">Normative references</h3>
 <!--begin-normative-->
 <p>[Here will be inserted the file "normative.inc"]</p>
 <!--end-normative-->
 <h3 class="no-num" id="informative-references">Informative references</h3>
 <!--begin-informative-->
 <p>[Here will be inserted the file "informative.inc"]</p>
 <!--end-informative-->
 </body>
 </html>
 <!-- Keep this comment at the end of the file
 Local variables:
 mode: sgml
 sgml-declaration:"~/SGML/HTML4.decl"
 sgml-default-doctype-name:"html"
 sgml-minimize-attributes:t
 sgml-nofill-elements:("pre" "style" "br")
 End:
 -->

Mercurial > drafts / annotate

css-style-attr/Overview.src.html@ca4cd8044f3f (annotated)

css-style-attr/Overview.src.html