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Re: MACINTOSH encoding?




On Jan 24, 2008, at 4:42 AM, Quinn wrote:

At 17:36 +0100 23/1/08, Stephane Sudre wrote:
the Message.Framework (which is deprecated, I know) sometimes sends e-mail with the MACINTOSH encoding.

Is it supposed to be equivalent to Mac Roman as it looks like to be?

The IANA charsets document:

<http://www.iana.org/assignments/character-sets>

indicates that "macintosh", "mac", and "csMacintosh" are all names for the encoding defined in RFC1345.

It's unfortunate that "MacRoman" wasn't one of the aliases for this.

<http://www.ietf.org/rfc/rfc1345.txt?number=1345>

RFC1345, in turn, references the Unicode 1.0 standard. I wasn't able to find a copy of the 1.0 standard, or find an appropriate reference within the later standards.

Regardless, you should be able to use the table from RFC1345 to confirm that this is MacRoman (once you figure out how to read the table which, I must admit, I found to be challenging :-).


Another good source of info is unicode.org. For example, here's the MacRoman table listed out with Unicode entity names:

<http://unicode.org/Public/MAPPINGS/VENDORS/APPLE/ROMAN.TXT>

If that table matches RFC1345, then that means these encodings are equivalent. Hmm, the RFC1345 doc includes '??' for a few entries in its table. The unicode.org document contains character info for all 256 values. You'll be able to thus compare the vast majority of characters, but not all.

There's also quite of bit of info here:

<http://www.unicode.org/Public/MAPPINGS/VENDORS/APPLE/Readme.txt>

It lists all the various "legacy" macintosh encodings. I don't see the mention of an encoding of "macintosh" anywhere; it only refers to "roman" (which is also the default encoding of those legacy systems).

Having said all of this, I'm almost 100% sure that "macintosh" and "macroman" are identical.

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Ricky A. Sharp         mailto:email@hidden
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References: 
 >MACINTOSH encoding? (From: Stephane Sudre <email@hidden>)
 >Re: MACINTOSH encoding? (From: Quinn <email@hidden>)



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