DL/I and CA IDMS/DB › DL/I and CA IDMS/DB Correspondences › Hierarchies and Sets

Hierarchies and Sets

Parent/Child Relationships Correspond to Sets

DL/I parent/child relationships (hierarchies) correspond to CA IDMS/DB sets. There must be a CA IDMS/DB set for each physical parent/child relationship. In a CA IDMS/DB set, the owner record type corresponds to the parent segment, and the member record type corresponds to the child segment.

With CA IDMS DLI Transparency, CA IDMS/DB sets can have only one member record type. Multi-member sets are not allowed.

DL/I Hierarchies and CA IDMS/DB Sets

The diagram below shows a sample DL/I hierarchy converted to a series of CA IDMS/DB sets.

Figure 20. DL/I hierarchies and CA IDMS/DB sets