[whatwg] Superset encodings [Re: ISO-8859-* and the C1 control range]

[NARUSE, Yui]

Øistein E. Andersen wrote:
>> Discouraged encodings:
>> ‘4.2.5.5 Specifying the document's character encoding’ advises against
>> certain encodings.  (Incidentally, this advice probably deserves not
>> to be ‘hidden’ in a section nominally reserved for character encoding
>> *declaration* issues.)  In particular:
>>
>>> Authors should not use JIS-X-0208 (JIS_C6226-1983), JIS-X-0212
>>> (JIS_X0212-1990), encodings based on ISO-2022, and encodings based on
>>> EBCDIC.

First, JIS-X-0208 and JIS-X-0212 are not in IANA Charsets,
moreover those correct names as spec are JIS X 0208 and JIS X 0212.

Second, JIS_C6226-1983, JIS_X0212-1990, and EBCDICs are not
ASCII compatible. So they are out of discouraged; mustn't use.

Finally, Why ISO 2022 series is discouraged is not clear.


Anyway, most of charsets defined RFC 1345 are not clear.
Conversion table between Unicode is needed.

-- 
NARUSE, Yui  <naruse at airemix.jp>