Improve export capability to accept zero input

[Gijsreyn]

Summary of the new feature / enhancement

As a resource author, I want to develop the export capability with or without the need to provide input. The current implementation requires setting at least one property input value. Because the origin of export iterates over the instances, I expect it to be called with zero or more properties set, even though the schema has at least one required property defined.

Proposed technical implementation details (optional)

No response