Each SYSIN record contains the following parameters:
DBDNAME. IMS DBD name.
DBID. IMS instance (Recon Identifier).
RECID. A value in (uppercase) hexadecimal from A0 through FF. It defines the log record type for the user-defined IMS log record, so it should be different to any other
user-defined
values which the site is using.
Leading spaces are ignored. Records are ignored where the first non-space characters are /* so can be used as comments.