Database labels
DI+ creates and maintains a label for each database in the IMS system.
Each database label contains the information needed to identify a particular database, including the details about the structure of the database and the date the label was created. The label also contains the values you set for the DI+ processing options. DI+ initializes the option values with those set in the global option module. You can change the processing options for individual databases through the ISPF interface.
The label is stored in the label data set. This data set is a dedicated VSAM key-sequenced data set (KSDS). DI+ automatically creates a label (if one does not already exist) the first time a database is opened after DI+ installation. See the following figure.
Database label creation and maintenance—automatic process
If you like, you can run a batch job to create database labels for all or specific databases defined for a system. If the DBD changes, DI+ automatically maintains the label information. See the following figure.
Database label creation and maintenance—manual process
