Form Field Representation for Dynamic Field Requirements

[mikestowe]

It was suggested to include a way to return dynamic form fields that may have different validation schemes (essentially going above and beyond the retrieval of form fields via the spec as described under _definition).

Use case:
Banking requirements or payments to different countries often require different fields and validation schemes.

Use case #2:
Medical related APIs may require different fields when submitting different diagnosis, rx, or symptoms.