A new MetaClass has to be created as a derivative (child) from another class (parent). This can easily be done in the Class Browser control, therefore
- Navigate to the favoured parent MetaClass inside the Class Browser
- Create a new MetaClass via Derive new object from the context menu
- Open the Object Editor control
- Set the newly created MetaClass as context object to this control
- Set Name, Description and Namespace properties
- Save the changes
Technical implementation
The system creates a new instance of CUSTOMMETACLASS and sets the INHERIT property to the MetaClass the context menu was opened at. New derivates can be created for any system MetaClass such as BASECLASS, REFERENCE, SELECTIVELIST, … etc.