Getting at a schema component's id attribute

Dear all,

I have been trying to figure out how to get the value of the "id" attribute 
of a schema component, but have got nowhere. Can anyone help?

Slightly more explicitly: if my XSD contains a type definition like this:

<complexType name="MyType" id="some_identifier_or_other">
...
</complexType>

and I have an instance of this type "myTypeInstance", is there some way that 
I can access the value of "id" by using "myTypeInstance.SchemaType()", or 
otherwise?

Regards,
Peter.