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IANA policy regarding character sets

1993-06-08 11:45:30
IANA registers one type of objects, namely character sets, in
two different name spaces.  There is a group of character sets
registered under the heading "MIME TYPES", subheading "Character
Sets", on pages 77 and 78 in RFC 1340, and another group of
character sets under its own heading "CHARACTER SETS" on pages

The same character set usually has different names in the two
groups.  For example US-ASCII in the first group is the same as
ANSI_X3.4-1968 in the second and ISO-8859-1 in the first is the
same as ISO_8859-1:1987 in the second.

The current handling of character set registration is bound to
cause misunderstandings.

1) What is the reason for the double registration of character

2) What is the purpose of the second group of character set

3) Will this purpose be clearly stated in the successor to RFC
   1340?  (That may counteract the widely spread misconception
   that the names in the second group can be used in MIME.)

4) Why has not the names of character sets occuring in both
   gropus been harmonized (or even better made equal)?

5) How does IANA ascertain that the same name is not allocated
   to one character set in the first group of character set
   names and to another in the second group?

Olle Jarnefors                     Internet: 
Information Management Services        UUCP: ...!uunet!mcsun!sunic!kth!ojarnef
Royal Institute of Technology (KTH)  BITNET: ojarnef(_at_)sekth  Fax:+46 8 10 
25 10
S-100 44  Stockholm, Sweden           Phone: +46 8 790 71 26 (time zone +0200)

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