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ERN-3 as well as ERN-4 contains a number of fields that can communicate dates or date-times. Some of these are to communicate “historic” information: when was “Hey Jude” recorded? When was it released? These fields are typically dates and support a variety of flags to indicate precision (e.g. IsBeforeand IsApproximate).

Other dates/date-times have a direct legal consequence in the context of an ERN message: the start and end dates of the validity period of a commercial deal, for instance. 

These periods can currently be provided in several forms:

  • Just a start date;
  • Just an end date;
  • A start and an end date;
  • Just a start date-time;
  • Just an end date-time; and
  • A start and an end date-time.(1)

DDEX has agreed to phase-out the “dates only” means of communicating such information over time. DDEX therefore recommends that implementers only use date-times.

 


(1) Note, it is technically also possible to have a period tag with no start and no end. This approach is, however, not acceptable.

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