PowerDesigner supports the PostgreSQL BaseType and CompositeType data types.
        
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                Select  to open the List of Domains.
            
 
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                Click the Add a Row tool to create a new domain, and then click the Properties tool to open its property sheet.
            
 
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                Select either BaseType or CompositeType from the Stereotype list and click Apply.
            
 
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                An new Base Type or Composite Type tab will be displayed, allowing you to specify type-specific extended attributes (see PostgreSQL extended attributes.