- ColorSpaceConversionOp has Resource candidate true - but both reference resources use it as a element i.e. not refelement.
- Comment. Should be a subelement with whatever baggage that entails but in the schema is in core types - no baggage.
- SubscriptionInfo - appears to be referenced by one message only (might be deprecated in others?) if so should it be inline.
All of these have some ramification with the schema and what type they inherit from etc.