This is super important for many localizations.
Say you want to download XML from customer invoices for whatever reason but odoo doesn’t have a direct menu or simple interface, does it?
Well in fact you can do it!
Just keep in mind that it is not retroactive.
Original post (Spanish): https://www.odoo.com/es_ES/forum/ayuda-1/exportacion-de-varios-xml-de-facturas-de-cliente-216757
Remade for new localization improvements.