MURATA Makoto wrote,
Dave Peterson wrote,
At 1:37 AM +0900 5/10/00, muraw3c(_at_)attglobal(_dot_)net wrote:
At the ietf-822 mailing list, Keith Moore [1] pointed out
that "-" is already used too heavily by existing media
types. Chris Newman [2] suggested ~!$^+{}| We picked |
One of the others would have had the advantage that it
doesn't look like another character (e.g., Cap I and/or
lower case L in san-serif) in any common fonts.
Which one do you strongly recommend? It is not too late.
One possible problem with '|'. Judging from RFC 1345 there are
a couple of EBCDIC variants it's missing from, in particular
IBM038 aka EBCDIC-INT. I've no idea if _anyone_ would ever want
to be able to round-trip MIME headers with XML Content-Types
through that encoding, but if they did it might be fiddly.
ISO 646 specifies the following 'invariant graphic characters'
which should be available in any encoding worth bothering
with,
! " % ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ?
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z _
a b c d e f g h i j k l m n o p q r s t u v w x y z
and the intersection of that set with Chris Newmans selection
boils down to,
! $ +
in which case I'd probably opt for '+'.
OTOH, maybe this just isn't worth worrying about.
Cheers,
Miles
--
Miles Sabin Cromwell Media
Internet Systems Architect 5/6 Glenthorne Mews
+44 (0)20 8817 4030 London, W6 0LJ, England
msabin(_at_)cromwellmedia(_dot_)com http://www.cromwellmedia.com/