During connectathon we ran into that the syntax CRD uses for prefetch (http://build.fhir.org/ig/HL7/davinci-crd/hooks.html#additional-prefetch-capabilities):

"ServiceRequest?_id={{context.draftOrders.ServiceRequest.id}}&_include=ServiceRequest:insurance"

Is incompatible with CDS Hooks, in https://cds-hooks.org/specification/current/#prefetch-tokens:

Only root-level fields with a primitive value within the context object are eligible to be used as prefetch tokens. For example, {{context.medication.id}} is not a valid prefetch token because it attempts to access the id field of the medication field.

And in https://cds-hooks.org/specification/current/#prefetch-query-restrictions

When using this subset, valid prefetch templates MUST only make use of
... a list that doesn't have "_include"

We should figure out a plan for resolving both of these incompatibilities.

Zulip: https://chat.fhir.org/#narrow/stream/180803-Da-Vinci.20CRD/topic/Reconciling.20prefetch.20between.20CRD.20and.20CDS.20Hooks

It looks like discussion of the first issue stalled, Lloyd is planning to bring it up again https://github.com/cds-hooks/docs/issues/377