## resource IDs

All resources in this project will have IDs (path: [resourceType].id) when they are retrieved from the FHIR server. These IDs are generated by the FHIR server when the resources was created and are only recognized the FHIR server. These ID’s can be used to perform GET, POST, PUT operations the resources using the following generic URL: [base]/[resourceType]/[id].

To get access to other identifications that are recognized by other software systems or organizations, one should look at [resourceType].identifier. For example, below we see a part of the patient/123 resource with a Health Card Number identifier:


{
	"resourceType": "patient",
	
	"id": "123"
	
	…
	
             "identifier":{
             
		"system": "www.ehealthontario.ca/API/FHIR/NamingSystem/ca-on-patient-hcn",
		
		"value": "123-13-123",
		
}

…

}



IDs for independent resources of the same type should be unique. There are also resources that are contained in other resources. IDs of the contained resources need to be unique only in the contained resource. For example, two practitioners that are contained in a referralRequest may have IDs 1 and 2 even though [base]/practitioner/1 and [base]practitioner/2 already exist. Note that practitioners 1 and 2 contained in a resource are not the same as [base]/practitioner/1 and [base]practitioner/2.