I believe that slide refers to "round trips" within the z/OS world only. There is no statement that CCSID conversion by a system other than z/OS (such as the PC ftp client in your example) will be covered in the 'round trip" guarantee.
You have to be transmitting and receiving with the same or a very compatible iconv() instance to be able to make such a guarantee. It's remotely possible that transmission to a linux ftp client with an iconv() that is compatible with the z/OS iconv() *might* support such a guarantee (e.g., z/Linux), but I wouldn't bet on it. And Win systems are almost guaranteed NOT to support such a guarantee. -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Charles Mills Sent: Tuesday, June 12, 2012 11:49 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Anyone a Unicode Services expert? -- roundtrip conversion Well, Peter, that's certainly consistent with what I see. I'm looking, however, at slide 11 of http://publib.boulder.ibm.com/infocenter/ieduasst/stgv1r0/index.jsp?topic=/c om.ibm.iea.zos/zos/1.9/IntegratingNewAppOnzOS/zOSV1R9_Integrating_newAppl_LE UnicodeServices/player.html . (You may have to unfold that URL.) It says "R - Roundtrip conversion. Roundtrip conversions between two CCSIDs assure that all characters making the roundtrip arrive as they were originally." How is that going to be accomplished if both 3F and 41 translate to 1A? How will they make the round trip back to what they were? What does technique R mean? I certainly understand that not every character in a given CCSID maps meaningfully to another CCSID. That's why I said "possibly meaningless" in my original question. Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:IBM-MAIN@bama.ua.edu] On Behalf Of Farley, Peter x23353 Sent: Tuesday, June 12, 2012 8:41 AM To: IBM-MAIN@bama.ua.edu Subject: Re: Anyone a Unicode Services expert? -- roundtrip conversion This is a false assumption: "... every code point in the from CCSID translates to a unique (possibly "meaningless") code point in the to CCSID ...". There is no guarantee that all code points in a given CCSID map to a "unique" code point in any other CCSID. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: INFO IBM-MAIN
