This Pace specifies that the version attribute of atom:feed should be free text, not just a number.
When people see version tags such as "0.5.2", they do not know the semantics of the version system. Are "0.x" versions stable? If they implemented "0.5.1", should they bother with "0.5.2"?
Giving a reader better information about what the version means will help them make better decisions about implementing the Atom spec.
Add the following sentence to the end of section 4.1 "version attribute":
The format of this attribute is unstructured text.
Any of the following might be used; the WG should decide which seems best.
<feed version="0.4"> <feed version="draft-ietf-atom-format-02.txt"> <feed version="Pre-release 0.4; do not implement this">