{
  "resourceType": "StructureDefinition",
  "id": "Extension-DataStandardsWales-Immunization.basedOn",
  "url": "https://fhir.nhs.wales/StructureDefinition/Extension-DataStandardsWales-Immunization.basedOn",
  "version": "1.0.0",
  "name": "ExtensionDataStandardsWalesImmunizationBasedOn",
  "title": "Extension Data Standards Wales Immunization Based On",
  "status": "active",
  "experimental": false,
  "date": "2026-03-09",
  "publisher": "NHS Wales",
  "contact": [
    {
      "name": "FHIR Standards",
      "telecom": [
        {
          "system": "email",
          "value": "fhir.standards@wales.nhs.uk",
          "use": "work",
          "rank": 1
        }
      ]
    }
  ],
  "description": "An extension to carry a plan, order or recommendation fulfilled in whole or in part by this immunisation. This is a R5 backport",
  "purpose": "This extension, which is a R5 backport, allows tracing of an authorisation for the Immunisation.",
  "copyright": "2026 NHS Wales",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Immunization"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://fhir.nhs.wales/StructureDefinition/Extension-DataStandardsWales-Immunization.basedOn"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/StructureDefinition/CarePlan",
              "https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-MedicationRequest",
              "https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-ServiceRequest",
              "https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-ImmunizationRecommendation"
            ]
          }
        ]
      }
    ]
  }
}