Simple Type Union Checks

PowerDesigner provides default model checks to verify the validity of simple type unions.

Check	Description and Correction
Undefined base type	You must define at least two data types when you derive a simple type by union. Manual correction: In the simple type property sheet, click the Properties tool beside the Derivation box to display the simple type union property sheet and type a white space separated list of at least two data types (qualified names) in the Member types box Automatic correction: None

Check

Description and Correction

Undefined base type

You must define at least two data types when you derive a simple type by union.

Manual correction: In the simple type property sheet, click the Properties tool beside the Derivation box to display the simple type union property sheet and type a white space separated list of at least two data types (qualified names) in the Member types box

Automatic correction: None