Yes, exactly.
This is one of the reasons for custom-defined table.
Custom-defined is not "standard"
And yes, the goal is to change selected characters, and prepare the
opposite table. Of course translation can be reversible when the table
has unique values (this is first of the conditions) . So, for example it
can be A->B translation, but B has to be translated as well, let's say
B->A. That would change ADAM BROWN to BDBM AROWN (assuming other
characters are not translated), but it reversible.
Let's say translation A -> B and B unchanged would give BDBM BROWN and
there is no way to find out which character need to be reversed.
BTW: I feel guilty a little bit. I just asked simple question and paid
attention of many gentlemen here. I hope the attention is not just to
solve my boring, rather off-topic issue, rather there is nothing
interesting to do instead. ;-)
However thank you all for your help!
--
Radoslaw Skorupka
Lodz, Poland
W dniu 29.12.2020 o 21:55, Charles Mills pisze:
I suspect the OP meant "ASCII" in the common (but granted pedantically
incorrect) sense of "one or more of the various code pages that use X'20'
for space, X'41' for A, X'30' for zero, and so forth, or a variant thereof."
Given that meaning, round trip is eminently possible.
Charles
-----Original Message-----
From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On
Behalf Of Seymour J Metz
Sent: Tuesday, December 29, 2020 12:32 PM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: EBCDIC-ASCII converter and other tools
Round trip is not possible with ASCII.
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