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C1 Contract Rules for Providing Dictionary Objects

A provider of DDIC objects must obey the following rules:

• DDIC domains

  Changes to domains must follow the rules for elementary data types. Furthermore, changes to the following semantic properties are restricted:

  • The output length must not be decreased.
  • The conversion exit must not be changed.
  • The setting for lowercase letters must not be changed.
• DDIC data elements

  Changes to data elements must follow the rules for elementary data types.

• DDIC table types
  • No changes are allowed.
• DDIC structures
  • Existing components must not be removed
  • Type changes to existing components are allowed for elementary components only and must follow the rules for elementary data types.
  • An elementary type of a component must not be changed into a non-elementary type such as reference type, a substructure or a table type and vice versa.
  • Only positions of non-key fields can be changed.
  • Non-key fields can be added.
• DDIC database tables

  The same rules apply to DDIC database tables as to DDIC structures.

• DDIC views

  DDIC views cannot be released with a C1 contract.