A URL pointing to the specification which this feed conforms to.

This element is rare. The reasoning was that in 25 years, someone will stumble on an RSS feed and not know what it is, so we should waste everyone’s bandwidth with useless links until then. Most publishers skip it, and all clients ignore it.

If this is a relative URI, it is resolved according to a set of rules.

Comes from

  • /rss/channel/docs