They are saying that if you go from Linux to z/OS to Linux then '%' might become '?' and then back to '%'. (Those are just example characters -- don't take them literally.)
But if you go from z/OS to Linux to Java then '?' might become '%' and then '!'. They are saying that round-trip does not mean you can just translate it twice and be back to the original character. You have to go "round trip" -- back to where (the CCSID?) you came from. It's not the clearest example. <g> Charles -----Original Message----- From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf Of Paul Gilmartin Sent: Tuesday, June 12, 2012 1:45 PM To: [email protected] Subject: Re: Anyone a Unicode Services expert? -- roundtrip conversion On Tue, 12 Jun 2012 12:59:13 -0700, Charles Mills wrote: > >" A round-trip conversion works only in a two-tier homogenous >environment where the data makes the complete round trip. For example, >if you pass data from DB2 for Linux, UNIX, and Windows to DB2 for z/OS >and then back to DB2 for Linux, UNIX, and Windows with a round-trip conversion, no data is lost. >The data was converted back to its original format. However, if you >have a more complicated environment, a round-trip conversion does not >necessarily preserve data integrity. For example, if you pass data from >DB2 for z/OS to >DB2 for Linux, UNIX, and Windows and then to Linux on a Java client, >two conversions have potentially occurred. Because the data was not >converted back to its original format before the second conversion, >data might have been lost even if round-trip conversions are used. > ??? Errr... The composition of two (or more) bijective function is a bijective function. This can't violate data integrity. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
