DB2 Change Management Expert and RDA can be used in different role-oriented contexts.
RDA supports logical data models and physical data models.
DB2 Change Management Expert supports physical data models.
You can translate the logical data models used by RDA into physical data models that can then be incorporated into DB2 Change Management Expert. Transformation from logical data models to physical data models must be completed within RDA. When you transform a logical model to a physical model, the logical entities map to physical objects. For example, entities become tables, attributes become columns, and relationships become referential integrity.
The physical models can be copied between the two products.
If a script contains commands that DB2 Change Management Expert supports, but that RDA does not, it will have a file extension of .chx.