The "JSON" view of resouroce content renders "Canonical" inside braces, but it's a primitive not an object; the braces should be omitted:

current behavior:

"instantiates" : [

{ [canonical|http://build.fhir.org/datatypes.html#canonical]([CapabilityStatement|http://build.fhir.org/capabilitystatement.html#CapabilityStatement]) }

], // Canonical URL of another capability statement this implements

shoudl be:

"instantiates" : ["<canonical([CapabilityStatement|http://build.fhir.org/capabilitystatement.html#CapabilityStatement])>"], // Canonical URL of another capability statement this implements

More broadly: these JSON and XML-ish views aren't proper JSON or XML. They're confusing for many implementers. Can we drop them?