The XML converters can produce diagnostic messages at runtime. These messages are documented in z/OS® V1R9.0 Language Environment® Run-Time Messages (SA22-7566-08)
For more information, see the list of conversion messages for XML Converters (starting at the message IGZ0280S) in the following: http://publibz.boulder.ibm.com/cgi-bin/bookmgr_OS390/Shel or http://publib.boulder.ibm.com/infocenter/zos/v1r9/topic/com