I got a response to the PMR. Taking the liberty of paraphrasing a long
reply, the essence of it seemed to be that -- per the CCSID pair lists in
the manual -- they support round trip conversion from 1027 to 1208 but not
from 1208 to 1027. Here is what I wrote back:
It sounds like you are saying (for the CCSIDs in question) "we support
round trip, but in one direction only." It would be like if I bought a
round trip ticket on Delta between San Francisco and Atlanta, and after
I got to Atlanta, they explained that it was a round trip ticket only
in one direction.
I would kind of question also whether what you are doing conforms to
your definition of round trip in the Unicode manual glossary: Round
trip. Encoding that occurs when every code point in the source CCSID
maps to a unique code point in the target CCSID. Using round trip
tables ensure the capability of reversing the conversion, and
recovering the complete original source datastream.
I would question "every code point in the source CCSID maps to a unique
code point in the target CCSID" when both 3F and 41 map to the same
code point, and I wonder how I would recover the original source
datastream.
Charles
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