Thanks for the comments. There is also another option at
http://martin.atkins.me.uk/specs/atommedia

It is a simple problem - an Atom entry could be routed between several
different device types. It would be a problem if a handset attempted to
play an HD video, but there is no way to know the media format. If the
media format was part of the link, the end device would immediately know
if it could decode the media.

Brett


-----Original Message-----
From: Dmitri Popov [mailto:[email protected]] 
Sent: Thursday, December 10, 2009 7:05 AM
To: Lindsley Brett-ABL001
Cc: atom-syntax Syntax
Subject: Re: Media Attributes For Links

On Tue, 2009-12-08 at 10:51 -0500, Lindsley Brett-ABL001 wrote:
> This is an old topic - was there any closure on adding additional
> media attributes to links?
> For example, a link to an image may want to specify its length/height.
> An MD5 would also be useful. Are there any recommended practices? 
I've adopted Media RSS (http://video.search.yahoo.com/mrss) - using
XML::Atom::Ext::Media perl module. It works for me, but I don't serve
Atom to users yet and using it for internal communication only, so any
sane approach would work for me - I don't worry too much if it standard
or not yet.

Media information is included into Entry element, but yes, I embed this
info in links. Using In-lining extension for Atom which is RFC draft.

http://tools.ietf.org/html/draft-mehta-atom-inline-01

so I've got something like

<link>
  <ae:inline xmlns:ae="http://purl.org/atom/ext/";>
    <entry>
      <media:thumbnail xmlns:media="http://search.yahoo.com/mrss/";
height="640" width="400"/>
    </entry>
  </ae:inline>
</link>

Here is XML::Atom extension I've made for In-lining support:

http://github.com/pin/xml-atom-ext-inline/blob/master/lib/XML/Atom/Ext/I
nline.pm

Sorry for so perlish point of view. And I'm not sure if it relevant for
you, but hope this helps...

-- 
Dmitri Popov

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