Other useful links


There are several organisations that use standardisation for more efficient data exchange.
Here you will find:

  • References to standard codes used in both trade as well as in electronic data interchange.
  • Estonian and EU e-invoicing standards (mostly used by public sector institutions)
  • International document standards: UBL and UN/CEFACT



1. Standard codes issued by GS1 to unify information exchange:



2. E-invoicing standards:

Estonian e-invoice standard:


EU e-invoice standard

  • EU e-invoicing web page
  • EU e-invoicing official standard EN 16931. Most important sections: 16931-1, 16931-3-1, 16931-3-2
  • EN 16931 syntax binding to Estonian e-invoice 1.2 (draft version)



3. Other common document standards:

  • UBL (Universal Business Language) – XML-based business document standard – OASIS
  • UN/CEFACT (United Nations Centre for Trade Facilitation and Electronic Business) XML-based business document standard – UNECE