- From: Simon Pieters via cvs-syncmail <cvsmail@w3.org>
- Date: Fri, 14 Sep 2012 14:26:24 +0000
- To: public-html-commits@w3.org
Update of /sources/public/html5/html4-differences
In directory hutz:/tmp/cvs-serv17141
Modified Files:
Overview.html
Added Files:
TR.html
Log Message:
add WD
--- NEW FILE: TR.html ---
<!DOCTYPE html><html lang="en-US"><head>
<title>HTML5 differences from HTML4</title>
<style type="text/css">
.note { margin-left:2em; font-weight:bold; font-style:italic; color:green }
p.note::before { content:"Note: " }
dfn { font-style:normal; font-weight:bold }
code { color:orangered; font-size:14px }
h3 code { font-size:17px }
code :link, code :visited { color:inherit }
pre code { color:inherit }
pre strong { color:inherit; background:#ffa }
</style>
<link href="http://www.w3.org/StyleSheets/TR/W3C-WD" rel="stylesheet">
</head>
<body>
<!--
Editor's checklist for stuff to fix for publication:
[...3159 lines suppressed...]
<dt id="refsHTML4">[HTML4]
<dd><cite><a href="http://www.w3.org/TR/html4/">HTML 4.01 Specification</a></cite>, Dave Raggett, Arnaud Le Hors and Ian Jacobs. W3C.
<dt id="refsHTML5">[HTML5]
<dd><cite><a href="http://dev.w3.org/html5/spec/">HTML5</a></cite>, Ian Hickson. W3C.
<dt id="refsPSL">[PSL]
<dd><cite><a href="http://publicsuffix.org/">Public Suffix List</a></cite>. Mozilla Foundation.
<dt id="refsSELECTORS">[SELECTORS]
<dd><cite><a href="http://dev.w3.org/csswg/selectors4/">Selectors Level 4</a></cite>, Elika J. Etemad. W3C.
<dt id="refsXHTML1">[XHTML1]
<dd><cite><a href="http://www.w3.org/TR/xhtml11/">XHTML™ 1.1 - Module-based XHTML - Second Edition</a></cite>, Murray Altheim and Shane McCarron.
<dt id="refsXML">[XML]
<dd><cite><a href="http://www.w3.org/TR/xml/">Extensible Markup Language</a></cite>, Tim Bray, Jean Paoli, C. M. Sperberg-McQueen et al.. W3C.
</dl></div>
Index: Overview.html
===================================================================
RCS file: /sources/public/html5/html4-differences/Overview.html,v
retrieving revision 1.190
retrieving revision 1.191
diff -u -d -r1.190 -r1.191
--- Overview.html 14 Sep 2012 12:53:00 -0000 1.190
+++ Overview.html 14 Sep 2012 14:26:22 -0000 1.191
@@ -267,7 +267,7 @@
type.</p>
<p>HTML5 also defines detailed parsing rules (including "error
- handling") for this syntax which are largely compatible with popular
+ handling") for this syntax which are largely compatible with HTML4-era
implementations. User agents must use these rules for resources that
have the <code>text/html</code> media type. Here is an example document
that conforms to the HTML syntax:</p>
@@ -344,6 +344,13 @@
written using the HTML syntax. Browsers already do this for
<code><!DOCTYPE html></code>.</p>
+ <p>To support legacy markup generators that cannot generate the preferred
+ short doctype, the doctype <code><!DOCTYPE html SYSTEM
+ "about:legacy-compat"></code> is allowed in the HTML syntax.
+
+ <p>The strict doctypes for HTML 4.0, HTML 4.01, XHTML 1.0 as well as XHTML
+ 1.1 are also allowed (but are discouraged) in the HTML syntax.
+
<p>In the XML syntax, any doctype declaration may be used, or it may be
omitted altogether. Documents with an XML media type are always handled in
standards mode.
@@ -352,7 +359,19 @@
<h3 id="mathml-svg"><span class="secno">2.3 </span>MathML and SVG</h3>
<p>The HTML syntax of HTML5 allows for MathML and SVG elements to
- be used inside a document. For instance, a very simple document using some of the
+ be used inside a document. An <code>math</code> or <code>svg</code> start
+ tag causes the HTML parser to switch to a special insertion mode which puts
+ elements and attributes in the appropriate namespaces, does case fixups for
+ elements and attributes that have mixed case, and supports the empty-element
+ syntax as in XML. The syntax is still case-insensitive and attributes allow
+ the same syntax as for HTML elements. Namespace declarations may be omitted.
+ CDATA sections are supported in this insertion mode.
+
+ <p>Some MathML and SVG elements cause the parser to switch back to "HTML
+ mode", e.g. <code>mtext</code> and <code>foreignObject</code>, so you can
+ use HTML elements or a new <code>math</code> or <code>svg</code> element.
+
+ <p>For instance, a very simple document using some of the
minimal syntax features could look like:</p>
<pre><code><!doctype html>
@@ -362,19 +381,39 @@
<strong><svg> <circle r="50" cx="50" cy="50" fill="green"/> </svg></strong>
</p></code></pre>
- <p>More complex combinations are also possible. For instance, with the SVG
- <code>foreignObject</code> element you could nest MathML, HTML, or both
- inside an SVG fragment that is itself inside HTML.</p>
-
-
<h3 id="syntax-misc"><span class="secno">2.4 </span>Miscellaneous</h3>
- <p>There are a few other syntax changes worthy of mentioning:</p>
+ <p>There are a few other changes in the HTML syntax worthy of mentioning:</p>
<ul>
<li>The <code>&lang;</code> and <code>&rang;</code> named character
references now expand to U+27E8 and U+27E9 instead of U+2329 and U+232A,
respectively.
+
+ <li>Many new named character references have been added, including all from
+ MathML.
+
+ <li>Void elements (known as "EMPTY" in HTML4) are allowed to have a
+ trailing slash.
+
+ <li>The ampersand (<code>&</code>) may be left unescaped in some more
+ cases compared to HTML4.
+
+ <li>Attributes have to be separated by at least one whitespace character.
+
+ <li>Attributes with an empty value may be written as just the attribute
+ name omitting the equals sign and the value, even if it's not a boolean
+ attribute. (HTML4 actually allowed using only the attribute
+ <em>value</em> and omitting the attribute name, for enumerated attributes,
+ but this was not supported in browsers.)
+
+ <li>Attributes omitting quotes for the value are allowed to use a larger
+ set of characters compared to HTML4.
+
+ <li>The <code>optgroup</code> end tag is now optional.
+
+ <li>The <code>colgroup</code> start tag is now optional and is inferred by
+ the HTML parser.
</ul>
Received on Friday, 14 September 2012 14:26:34 UTC