How Does InterSystems FHIR profile validation works?

Hi folks!

Examining FHIR profile validation with InterSystems FHIR server. FHIR profiles is a very useful feature of FHIR standard that helps an organization or solution to establish constraints to a very disperse FHIR standards that are relevant to a particular business solution. Learn more on FHIR profiles.

I created a very simple FHIR profile with the following JSON:

{

"resourceType": "StructureDefinition",

"url": "http://example.org/fhir/StructureDefinition/TutorialPatient",

"name": "TutorialPatient",

"status": "draft",

"fhirVersion": "4.0.1",

"mapping": [

{

"identity": "rim",

"uri": "http://hl7.org/v3",

"name": "RIM Mapping"
},

{

"identity": "cda",

"uri": "http://hl7.org/v3/cda",

"name": "CDA (R2)"
},

{

"identity": "w5",

"uri": "http://hl7.org/fhir/fivews",

"name": "FiveWs Pattern Mapping"
},

{

"identity": "v2",

"uri": "http://hl7.org/v2",

"name": "HL7 V2 Mapping"
},

{

"identity": "loinc",

"uri": "http://loinc.org",

"name": "LOINC code for the element"
}

],

"kind": "resource",

"abstract": false,

"type": "Patient",

"baseDefinition": "http://hl7.org/fhir/StructureDefinition/Patient",

"derivation": "constraint",

"differential": {

"element": [

{

"id": "Patient. identifier",

"path": "Patient. identifier",

"min": 1
},

{

"id": "Patient.name",

"path": "Patient .name",

"min": 1,

"max": "1"
},

{

"id": "Patient.gender",

"path": "Patient.gender",

"min": 1
}

]

}

}

As you can see in "differential" section it makes mandatory fields of id, name and gender.

I managed to successfully submit the profile via the POST request to:

localhost:52773/fhir/r4/StructureDefinition

Then I submitted the following test Patient profile, where I omitted the "id" field and included the FHIR profile link in the meta section to:

localhost:52773/fhir/r4/Patient

{

"resourceType": "Patient",

"meta": {

"profile": [

"http://example.org/fhir/StructureDefinition/TutorialPatient"
]

},

"text": {

"div": "‹div xmlns=\"http://ww.w3.org/1999/xhtml\"><h1>Elon Musk</hi>/div>",

"status": "generated"
},

"name": [

{

"use": "official",

"given": [

"Elon"
],

"family": "Ramesh"
}

],

"gender": "male",

"birthDate": "1997-09-08",

"telecom": [

{

"value": "9876543210",

"use": "mobile",

"system": "phone"
},

{

"system": "email",

"value": "elon.musk@gmai.com"
}

]

}

And instead of the expected error I'm getting the successfully created patient.

What am i doing wrong? How are the FHIR validation profiles supposed to be used in InterSystems FHIR server?