If your passionated by Real Time Reporting, E-Invoicing, etc, you should read (and give input to) the draft version of the document on Global Interoperability Framework. The documents can be requested via this Link.
The Global Interoperability Framework (GIF) is a set of recommended practices, policies, and standards for the operation of any ‘four-corner’ interoperability network organised within a collaborative governance framework wishing to be GIF compliant. Such a network allows its dedicated access points, which are typically service and solution platform providers of various kinds, to quickly and easily inter-connect their extensive customer networks for the secure and robust exchange of digital supply chain-related transactions such as e-invoices and orders. The GIF objective is to enable smoother implementation of end-user business connections by building economies of scale and scope.