W-IA and W-OA are the import and export views, respectively. The stub must contain data structures that correspond exactly to the import and export views of the External Action Block. The fields in the data structure correspond to attributes in the import and export views of the External Action Block. Each field in a data structure must be preceded by a field defined as PIC X.
Note: If either the import or export views have been modified and you want to replace the previous view declaration with the new one, then the stub must be regenerated. Regeneration is also required if the stub is used for reference and changes to the views were manually made. In this case, the generated code for the calling action diagram could be used instead. If the stub is regenerated, the data and procedure names could be different, as they are not stored on the encyclopedia but generated by an algorithm.
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