DDM

DDM implementations use DDM commands as their common language for processing remote data access. DDM provides a vocabulary and set of rules for sharing and accessing data among like and unlike computer platforms. It includes a set of standardized file models and access methods that allows users and applications to access remote data without needing to upload and download files.

DFM is a DDM target implementation providing access and sharing of z/OS® files to DDM source implementations. DDM source systems use DDM commands to access and share data on DDM target z/OS systems. DDM defines the following terms concerning remote file access:

Source of the request: Initiates requests for data that resides remotely on another system that has DDM target capability.
Target of the request: Processes requests for data initiated by a source system in the network.

For more information about DDM, see Distributed Data Management Architecture: General Information.