Dave Winer: On the Atom-Syntax list they're talking about versioning and extensibility, two problems that are very easily solved in XML. For versioning, define a required version attribute on the feed element, a string in the form x.y, where x and y are two numbers.
Randy: It's not that easy in Atom-land. You see, they have defined more than one root level element. They have allowed atom:entry to be a root level element in the API. The version must exist on all root level elements.
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