> In your case, there is an alternative: character maps, which are guaranteed
to work across processors in the same way.
>

Provided that the processor is serializing the result tree. If the output is
not serialized, character maps have no effect. So in practice, the interop
isn't that much better than d-o-e, since nearly all cases where d-o-e doesn't
work are because the processor is not serializing.

Michael Kay
Saxonica