Shuffling the deckchairs on the Titanic.
We will probably end up with something so complicated as to be unusable.
A quick definition of about 100 business items in XML should take a student about two weeks but no doubt the software providers will be asked for their input and an address definition will be 25 pages of XML, and an invoice for a bar of chocolate require will take 50 minutes to download on a T2 and require a certain vendors license.
EDI was rubbish but we've gone downhill since then.