Whether we place the qualifiers on the left (in NAME=...) or on the right
(in CONTENT=...), I suggest we do not provide an escape mechanism for use in
qualifier values. Such mechanisms (eg %28) are error-prone and user-
unfriendly.
This, of course, means that certain characters would be unvailable in
qualifier values. If the qualifiers are on the right, the main excluded
character would be ")".
Misha
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