interface  Scope{
   exception   DuplicateName{};
   exception   NameNotFound{string reason;};
   void        bind( in string name,
                  in MetaObject value )
                    raises( DuplicateName );
   MetaObject   resolve( in string name )
                    raises( NameNotFound );
   void        unbind( in string name)
                    raises( NameNotFound );
   list<RepositoryObject> children();
};