6.7 Namespace attribute
Namespace attribute can be used to enable a message sender to use proprietary values or identifiers.
The recommended value to be used for the
Namespace attribute of an allowed value set tag is the DDEX Party Identifier of the message sender that controls the proprietary allowed value. The DDEX Party Identifier is defined in, and administered in accordance with the latest version of the DDEX Party ID Standard which can be found here.