https://datatracker.ietf.org/doc/html/rfc4287
https://datatracker.ietf.org/doc/html/rfc5023
These specs and the discussion about them at the time really are from a different era of the web. The Syndication Protocol fully embraced REST which was also white hot then. There was a real feeling that with a good format and a standardized way to consume and interact with the resources, it would allow for easier sharing of not just blog posts but other data as well.As intense as the discussion was around the development of RFC-5023, it was basically ignored from the moment it was released and even the main spec author declared it basically dead not very long afterward:
https://web.archive.org/web/20090421042741/http://bitworking...
Needless to say, the web took an entirely different direction and while these specs exist, there isn't much interest in them any longer.
The Brocken is the highest peak in the Harz mountains of Germany and is where witches are said to gather on Walpurgis Night. So it was quite a subtle dig.