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Definition:

(DDM) An IBM data protocol architecture for data management services across distributed systems in an SNA environment.

DDM provides a common data management language for data interchange among different IBM system platforms.

Products supporting DDM include AS/400, System/36, System/38 and CICS/DDM.

On the AS/400, DDM controls remote file processing.

DDM enables application programs running on one AS/400 system to access data files stored on another system supporting DDM. Similarly, other systems that have DDM can access files in the database of the local AS/400 system.

DDM makes it easier to distribute file processing between two or more systems.

{OS/400 Distributed Data Management V3R6 Reference (http://as400bks.rochester.ibm.com/cgi-bin/bookmgr/bookmgr.cmd/BOOKS/QBJALH00/CCONTENTS.