[xsd-users] Can I retain custom type and original type?

[joe florence]

Hi Boris,
Just a quick question, is it possible to retain functionality of built-in
type along with its custom type defined or do I need to redefine everything
in custom type that is there in built in type?
For example, if I need to redefine xsd:time as custom type, do I need to
have everything redefined that class time in date-time has?

Thanks in advance.