Atom media extension

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Using Yahoo media for content aggregation
Working with Yahoo Media
Using media rss to syndicate and share media
Example feeds
short item
full item
The yahoo media content and group elements
Enclosures in yahoo media, rss, and atom
Media rss media group element
Media rss media group alternatives scheme
Atom media extension
Overview of images in rss

Printing and index

Similar to the yahoo-media extension, c.f. Using media rss to syndicate and share media, there is a proposal for an atom media extension.

Some links:

One of the main differences is introducing <media:content> vs. extending <atom:link rel="enclosure">. To some extent this has the advantage of having a fall back to the basic <atom:link rel="enclosure"> is the extension isn't understood. On the other hand <media:content> is widely understood by parsers.

Quote from, giving some motivation for a simplified namespace (compared to yahoo-media extension):

  • MediaRSS uses extension elements exclusively, while AtomMedia extends the atom:link element. In particular, it extends standard Atom's link rel="enclosure" for compatibility with existing implementations.
  • AtomMedia excludes the MediaRSS features that are not directly useful for the aggregation and activity stream use-cases. In particular, I did not include content ratings, regional exclusions, "credits", timed text and media hashes. Many of these feel like things that are more general than this use-case, anyway.
  • AtomMedia reduces the media metadata considerably: it has only width/height for visual things and duration for time-based things. Some of the other attributes (fileSize, lang, type, ...) have equivalents in generic Atom and are thus omitted.

I would argue that there are two use-cases: One is basic aggregation, and the other is creating "far-side" portals, for instance in putting together . Perhaps for basic aggregation, the list of attributes could be reduced. However, certainly for "far-side" portals (and server-portal communication within institutions), a richer set of attributes is needed.

We suggest here Media rss media group element, that we might want to extend the media attributes of media rss, to make far-side portals easier. More details at


EXAMPLE MOVED HERE: Enclosures in yahoo media, rss, and atom