FHIR profiled json format

Question

Base Patient resource has identifier with cardinality 0 -> many. We have profile based on Patient where we have identifier 1 -> 1.

So how the output json should look like ?

"identifier": {
    "system" : "some-system.url",
    "code"   : "code121"
}

as json object or

 "identifier": [
 {
     "system" : "some-system.url",
     "code"   : "code121"
 }
]

as array

Answer 1

Look to https://www.hl7.org/fhir/profiling.html#cardinality "Note that though a profile can constrain an element from x..* to x..1, this doesn't make any difference to the representation in the JSON format - the element will still be represented in an array."