This Clause lists all allowed value sets with their allowed values and definitions that are valid within this standard.
Allowed values are listed, defined and provided in accordance with the DDEX Data Dictionary and the latest version of the DDEX Data Dictionary Standard. To override a DDEX-defined value, some allowed value sets provide the DDEX-defined value
UserDefined, followed by a single space character and a string representing the term to be communicated. This string shall only comprise lower case letters, upper case letters or digits, e.g.
StreamInOnlineGame. Such user-defined values will need to be agreed between Message Sender and Message Recipient and users are encouraged to raise these issues with DDEX with a view to having these values added to the list of DDEX-defined allowed values.