- From: Antoli, Leo <Leo.Antoli@Misys.com>
- Date: Wed, 16 Aug 2006 17:34:44 +0100
- To: xml-dev@lists.xml.org, xmlschema-dev@w3.org
Dear all,
I have the following schema element types:
Vehicle <--- MyVehicle
^ ^
| |
Car <-- MyCar
Vehicle is the base element type. Car extends from Vehicle.
I want to add new elements to Vehicle, so I've created MyVehicle.
Now I want to extend Car with MyCar, but I want MyCar also to have MyVehicle
new child elements.
Any idea about how to get this? I don't want to change or redefine Vehicle
or Car as they are official elements, but I want to be able to extend them
to add new child elements.
The problem in Java or other languages is only solved for operations (using
interfaces) but not for properties.
I was thinking in using element groups instead of inheritance but then I
can't use substitution groups. I want to use them so I could be able to use
MyVehicle in all places in a XML document where Vehicle is allowed.
Thank you very much.
Kind Regards,
Leo Antoli
Received on Wednesday, 16 August 2006 16:36:32 UTC