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	<updated>2026-05-07T09:38:19Z</updated>
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		<id>https://wiki.whatwg.org/index.php?title=PragmaExtensions&amp;diff=6371</id>
		<title>PragmaExtensions</title>
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		<updated>2011-04-21T01:23:04Z</updated>

		<summary type="html">&lt;p&gt;Spexx: &lt;/p&gt;
&lt;hr /&gt;
&lt;div&gt;This page lists the allowed extension values for the http-equiv=&amp;quot;&amp;quot; attribute of the &amp;amp;lt;meta&amp;gt; element in HTML5. For the detailed registration requirements, [http://www.whatwg.org/html#concept-http-equiv-extensions see the specification].&lt;br /&gt;
&lt;br /&gt;
{|  &lt;br /&gt;
! Keyword&lt;br /&gt;
! Brief description&lt;br /&gt;
! Specification&lt;br /&gt;
|- &lt;br /&gt;
| PICS-Label&lt;br /&gt;
| Labels that help content advisory software protect children from potentially harmful material [[http://www.fosi.org/icra/ more]]&lt;br /&gt;
| [http://www.w3.org/TR/REC-PICS-labels/ PICS Label Distribution Label Syntax and Communication Protocols]&lt;br /&gt;
|-&lt;br /&gt;
| x-dns-prefetch-control&lt;br /&gt;
| Allows turning prefetching &amp;quot;on&amp;quot; or &amp;quot;off&amp;quot;. There&#039;s an equivalent HTTP header. Which takes precedence is undefined. Needed for [http://www.pinkbike.com/news/DNS-Prefetching-implications.html]&lt;br /&gt;
| [https://developer.mozilla.org/en/controlling_dns_prefetching Controlling DNS prefetching]&lt;br /&gt;
|-&lt;br /&gt;
| x-ua-compatible&lt;br /&gt;
| Allows to control the way Microsoft Internet Explorer renders webpages (Document compatibility modes, e.g. content=&amp;quot;IE=edge&amp;quot;) and to enable Google Chrome&#039;s open web technologies (Google Chrome Frame, e.g. content=&amp;quot;chrome=1&amp;quot;) if previously installed. See also: [https://github.com/paulirish/html5-boilerplate/blob/master/index.html HTML5 Boilerplate]&lt;br /&gt;
| [http://msdn.microsoft.com/en-us/library/cc288325(v=vs.85).aspx MSDN - Defining Document Compatibility]&lt;br /&gt;
[http://www.chromium.org/developers/how-tos/chrome-frame-getting-started Google Chrome Frame: Developer Guide]&lt;br /&gt;
|}&lt;br /&gt;
&lt;br /&gt;
[[Category:Registries]]&lt;/div&gt;</summary>
		<author><name>Spexx</name></author>
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