DDM can be used to communicate between systems that are architecturally different.
For example, although the architectures of the iSeries™ server and System/36™ are different, these systems can use DDM to access files in each other's database. To successfully communicate with each other, each system must have an implementation of DDM that is compatible with Level 2.0 or below of the IBM® DDM architecture. Also, each type of system might use all or only part of the IBM DDM architecture or might have extensions to the architecture.
If you are communicating with any non-iSeries servers, you must consider the level of DDM support provided by those servers for such things as unique security considerations.
For a list of the DDM architecture manuals that supply the details about Level 3.0 or below of the IBM DDM architecture, see Related information for distributed data management.