Actions 2022-05-17

 > Steven to revert wording to attribute
Done
 > Steven to add wording forbidding xmlns
Done
 > Steven to insert Michael's ambiguity text
Done
 > Steven to contact Prague.
Done; no reply as yet.
 > Steven to add version declaration
Done. However, I note that this adds several conformance criteria that we 
should probably discuss at the meeting.
I also made one change: all meaningful content ends in attributes in the 
XML serialisation of ixml, so I used
         prolog = version, s.
       @version = -"ixml", RS, -"version", RS, -string, s, -'.' .