No.	Constraint	Description
1	Distributed data management	A distributed approach to data management is important, and it can affect architectural decisions. There shall be no middle entity gathering all the data, i.e., in a centralized manner.
2	Respect for subsidiarity	It is important to integrate with the existing energy data sharing infrastructures of Member States (and not try to replace them). While integrating with existing data sharing infrastructures, comments/remarks/suggestions regarding functionality and usability of the provided APIs may emerge, which can be conveyed to the respective infrastructure providers to facilitate improvements.
3	Customer sovereignty	The need of the customers to share their data in order to participate in energy data processing services shall not lead to any loss of data access control (of the customers whose data is stored and used).
4	Data space interoperability	Interactions with relevant European data space initiatives shall be sought and explored and, if possible, implemented.
5	European viewpoint	The priority is to integrate with existing European energy data sharing infrastructures in order to offer European energy data access (not focus on a specific country).
6	Existing metering infrastructure	When connecting to smart metering infrastructure, the focus is on compatibility with existing and already rolled-out hardware devices. This applies to utility infrastructure as well as in-house home automation and IT devices.