create ABC ;
cd ABC ;
declare-ns O ONE: ;
register-namespace O ONE: ;

declare-ns T two:IS:a_namEsp ;
register-namespace T two:IS:a_namEsp ;

set-ns ONE: O;

insert element O:ZZZ into . ;
my $t := insert element T:ZZZ into . ;
my $q := insert element O:QWERTY into $t ;
insert element T:UIOP into $q ;

insert element O:QWERTY into . ;
insert element T:UIOP into O:QWERTY ; # No need to create variables everytime.

save :f new.xml ;