Parts of DDM
DDM consists of several parts to handle remote file processing among the systems using DDM.
- Source DDM (SDDM)
- Target DDM (TDDM)
- DDM file

The preceding figure shows how the basic parts involved in DDM communications on both systems relate to each other.
When a DDM file is accessed by a client system user or program, a DDM conversation is started between SDDM and TDDM for the job in which the program or user is operating.