> I've lost the original post, what is the mapping you are trying to
achieve?

The original example was somewhat extreme.

CCSID 01027: Encoding scheme 1100 - EBCDIC, SBCS; Name JAPAN LATIN

CCSID 01208: Encoding scheme 7807 - UTF-8, UCS-2 transform; Name UTF-8 WITH
IBM 

Both the Unicode manual for z/OS V1R13 and the returned information from
CUNLINFO indicate that roundtrip conversion is supported for this CCSID
pair.

Charles

-----Original Message-----
From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf
Of Steve Comstock
Sent: Tuesday, June 12, 2012 11:06 AM
To: [email protected]
Subject: Re: Anyone a Unicode Services expert? -- roundtrip conversion

On 6/12/2012 11:59 AM, Charles Mills wrote:
> Peter, thanks. Believe me, I have done a *lot* of CCSID research.
>
> CCSID 1208 is Encoding scheme 7807 - UTF-8, UCS-2 transform; Name 
> UTF-8 WITH IBM PUA. It is *the* basic UTF-8 CCSID.
>
>> there is no way for EBCDIC 41 to "round trip" through classic 7-bit 
>> ASCII
>
> Fair enough. Unicode services reports however that it supports 
> roundtrip conversion in many of these cases, including for example, 37 
> to 850 (pretty basic ASCII). What does roundtrip conversion mean? That 
> is my fundamental question.

Roundtrip conversion means what you think: translate string A to string B
then back from string B to string A' then A = A'

Clearly you are not experiencing that.

Just as clearly, there are many mappings for which roundtrip conversion is
not possible. I've lost the original post, what is the mapping you are
trying to achieve?

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