Glossary

A B C D E F G H I J K L M O P Q R S T Ü V W X Z

X.400

Telekom e-mail system.

XML

Extensible Markup Language – markup language for Representation of hierarchically structured data in the form of a text file that is readable by both humans and machines.

ZUGFeRD

Central User Guide of the Electronic Invoice Germany Forum – is a data format for electronic invoices.