To include the flag-tag and evaluation logic in the FHIR Flag resource, I am to use the extension mechanism provided by FHIR. This extension allows us to add custom or non-standard elements to FHIR resources while maintaining interoperability with the standard. below is example how we can map the OMRS flag model with FHIR flag resource.
{
"resourceType": "Flag",
"id": "flag id",
"name": "flag name",
"criteria": "flag criteria",
"subject": {
"reference": "Patient/1"
},
"status": "active",
"code": {
"text": "message"
},
"priority": {
"coding": [
{
"system": "URL",
"code": "p1",
"display": "red"
}
],
"rank": 2
},
"note": "additional note"
"enabled": true,
"extension": [
{
"url": "URL logic ",
"valueString": "Groovy script"
},
{
"url": "URL tag",
"valueString": "Tag details"
}
]
}