For each IMS data map instance, you must specify a DBD. You can optionally specify a COBOL copybook overlay for each segment that the DBD defines. You can specify a different copybook for each segment or the same copybook for multiple segments.
Within an imsDatamapInstance element, specify the following elements:
To define a DBD only, include an importDBDDetails element within the imsDatamapInstance element.
To define a DBD with copybook overlays, include an importDBDDetails element within the imsDatamapInstance element, and include an OverlayDetails element for each segment.
When you import a DBD with multiple segments, by default, the createdatamaps utility creates a record and a table for each segment and also creates a complex table that includes the columns from each segment in the hierarchy. To disable the creation of complex tables, specify false for the createTablesForHierPath element.
The MaxRedefines element is not supported for IMS data maps. For IMS data maps, the utility always selects the first redefine.