At this moment attribute "UnidadPeso" for XML Carta Porte 2.0 is showing a fixed value "XAG". This is a correct value and XML gets stamped correctly but it should be better to have the following new items:

1. A new form where all the possible values for this attribute can be registered according to SAT catalog.

2. A new field on the "Transportation details" form where this value can be captured for each transport type.

The XML should have the "UnidadPeso" selected on the transportation details form.