Proposal to make meta and meta.source/meta.sourceId required

[cookeac]

In February 2023 it was proposed that the metadata element of icarResource (and certainly icarEventCoreResource) should be made a required field, and that the source and sourceId components of that icarMetadataType should be made required.

See issue #366

This is potentially a breaking change to implementations and would normally have to wait until a major version - ADE 2.0.
Members of the technical working group have confirmed that as far as they are aware, these fields are treated as mandatory in all their implementations, and on that basis it might be possible to bring this in when ADE 1.4 is released in late 2023 instead.

However, there may be other implementations of the ICAR ADE specification of which we are not aware. This therefore is notice to all users. Please ask your interoperability partners to also read and respond to this notice. Let us know if you are using ADE and whether this would be a breaking change for your implementation.