[whatwg] URN or protocol attribute

Simon Pieters simonp at opera.com
Wed Feb 10 04:36:04 PST 2010

On Wed, 10 Feb 2010 08:55:56 +0100, Martin Atkins  
<mart at degeneration.co.uk> wrote:

> Brett Zamir wrote:
>> Hi,
>>  Internet Explorer has an attribute on anchor elements for URNs:  
>> http://msdn.microsoft.com/en-us/library/ms534710%28VS.85%29.aspx

> Internet Explorer supports a non-standard attribute on the "A" element  
> called "urn", which accepts an URN identifying some resource.
> It is described in detail here:
> http://msdn.microsoft.com/en-us/library/ms534710(VS.85).aspx
> It is not apparent that this attribute causes any behavior in the  
> browser itself. It is possible that this is exposed to browser  
> extensions in some way to allow them to overload the behavior of a link  
> which identifies a particular class of resource.
> It does not seem that this attribute has achieved wide author adoption  
> nor wide application support.

IE's .urn attribute is present on *all* elements, and is part of IE's  
"namespaces". It's the equivalent of DOM's .namespaceURI.

Simon Pieters
Opera Software

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