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Difference between revisions of "PragmaExtensions"

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(add prefetching back in too so we at least keep track of what is being used)
(divide into Allowed and Proposed)
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This page lists the allowed extension values for the http-equiv="" attribute of the <meta> element in HTML. For the detailed registration requirements, [http://www.whatwg.org/html#concept-http-equiv-extensions see the specification].
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This page lists allowed and proposed extension values for the http-equiv="" attribute of the <meta> element in HTML. For the detailed registration requirements, [http://www.whatwg.org/html#concept-http-equiv-extensions see the specification].
  
{|
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== Allowed extensions ==
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The following extensions conform to all the registration requirements in the HTML spec and are therefore allowed in valid documents.
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{| class="wikitable"
 
! Keyword
 
! Keyword
 
! Brief description
 
! Brief description
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| Labels that help content advisory software protect children from potentially harmful material [[http://www.fosi.org/icra/ more]]
 
| Labels that help content advisory software protect children from potentially harmful material [[http://www.fosi.org/icra/ more]]
 
| [http://www.w3.org/TR/REC-PICS-labels/ PICS Label Distribution Label Syntax and Communication Protocols]
 
| [http://www.w3.org/TR/REC-PICS-labels/ PICS Label Distribution Label Syntax and Communication Protocols]
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|}
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== Proposed extensions ==
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The following proposed extensions do not yet conform to all the registration requirements in the HTML spec and are therefore not yet allowed in valid documents.
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{| class="wikitable"
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! Keyword
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! Brief description
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! Specification
 
|-
 
|-
 
| x-dns-prefetch-control
 
| x-dns-prefetch-control

Revision as of 12:11, 1 March 2013

This page lists allowed and proposed extension values for the http-equiv="" attribute of the <meta> element in HTML. For the detailed registration requirements, see the specification.

Allowed extensions

The following extensions conform to all the registration requirements in the HTML spec and are therefore allowed in valid documents.

Keyword Brief description Specification
PICS-Label Labels that help content advisory software protect children from potentially harmful material [more] PICS Label Distribution Label Syntax and Communication Protocols

Proposed extensions

The following proposed extensions do not yet conform to all the registration requirements in the HTML spec and are therefore not yet allowed in valid documents.

Keyword Brief description Specification
x-dns-prefetch-control Allows turning prefetching "on" or "off". There's an equivalent HTTP header. Which takes precedence is undefined. Controlling DNS prefetching
X-UA-Compatible Specifies the IE rendering mode that should be used to render the document. Widely used, but not registered with IETF/IANA. MSDN: Defining Document Compatibility