Introduction to the CA IDMS DBOMP Transparency › Data Description Guidelines

Data Description Guidelines

Adhere to the data description guidelines presented below when you describe the parts of the CA IDMS/DB database that will be accessed by bridged DBOMP programs:

• Make sure there is one CA IDMS/DB record type for every DBOMP file to be simulated.
• Check the schema description of the CA IDMS/DB record types. Make sure the description allows the generation of a subschema view that represents the data exactly as it appears on the DBOMP files, with the exception of disk addresses, which are not part of the schema description.
• Define record types that are members of more than one set in the schema with next, prior, and owner pointers, so that an end-of-set condition can be detected by the transparency and communicated to the calling program.
• Store DBOMP master files as CALC or DIRECT (for sequential processing) record types on the CA IDMS/DB database.
• Store DBOMP chain files as VIA record types on the CA IDMS/DB database; however, these member records can also be described as owners of other sets.