XML namespace
Media RSS
The de facto way to attach images, video and audio to a feed item with dimensions, type and thumbnails — far richer than RSS's own <enclosure>.
xmlns:media="http://search.yahoo.com/mrss/"RSS 2.0 gives an item one <enclosure>, with a URL, a length and a type, and nothing else. Media RSS replaces that with <media:content> and <media:group>, which carry width, height, duration, bitrate, medium, and any number of <media:thumbnail> elements — and can appear more than once per item.
It is read by podcast directories, news aggregators, Google Discover and most feed-driven content platforms, which makes it the practical requirement for any feed whose items are more than text.
The URI still points at search.yahoo.com because the specification originated there. It is an identifier, not an address, and the fact that Yahoo no longer maintains it changes nothing — rewriting the URI to something more current breaks every consumer.
- URI
http://search.yahoo.com/mrss/- Prefix
media- Elements
contentgroupthumbnailtitledescriptioncredit
Specification: Media RSS specification
Formats that use it
RSS 2.0
<rss>The most widely deployed syndication format: namespace-free at its core, extension-heavy in practice, and unopinionated about almost everything.
Atom 1.0
<feed>The IETF-standardised syndication format: namespaced from the root, strictly typed, and unambiguous about dates in a way RSS 2.0 never was.
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