{
  "resourceType": "StructureDefinition",
  "url": "https://example.org/fhir/StructureDefinition/VeteranAttributePatient",
  "name": "VeteranAttributePatient",
  "status": "draft",
  "fhirVersion": "4.0.1",
  "kind": "resource",
  "abstract": false,
  "type": "Patient",
  "baseDefinition": "http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Patient.identifier",
        "path": "Patient.identifier",
        "slicing": {
          "discriminator": [
            {
              "type": "pattern",
              "path": "$this"
            }
          ],
          "rules": "open"
        },
        "short": "VA identification number",
        "definition": "VA identification number for VA patients"
      },
      {
        "id": "Patient.identifier:vanumber",
        "path": "Patient.identifier",
        "sliceName": "vanumber",
        "short": "VA Indetification Number",
        "definition": "VA indentification number for VA patients",
        "requirements": "VA identification number is a unique identifier for interoporability",
        "max": "1",
        "patternIdentifier": {
          "use": "usual",
          "system": "http://va.gov/mpi"
        }
      },
      {
        "id": "Patient.identifier:medicarenumber",
        "path": "Patient.identifier",
        "sliceName": "medicarenumber",
        "short": "Medicare Number",
        "definition": "Medicare identification number for Medicare patients",
        "requirements": "Medicare identification number is a unique identifier for interoporability and is used for member match",
        "max": "1",
        "patternIdentifier": {
          "use": "official",
          "system": "http://hl7.org/fhir/sid/us-mbi"
        }
      }
    ]
  }
}