{
  "resourceType": "StructureDefinition",
  "url": "https://mpd.noma.no/identifier/unii-code",
  "version": "3.0",
  "name": "SubstanceIdentifierExtension_UNIICODE_NOMA_GUPRI",
  "title": "SubstanceIdentifierExtension_UNIICODE_NOMA_GUPRI",
  "status": "active",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "SubstanceSpecification"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "GSRS Substance ID",
        "definition": "The Unique Ingredient Identifier (UNII) generated by the [Global Substance Registration System (GSRS)](https://gsrs.ncats.nih.gov/) of the US Food and Drug Administration.\r\n\r\nSystem URL: [https://mpd.noma.no/identifier/unii-code](https://mpd.noma.no/identifier/unii-code)",
        "max": "1"
      },
      {
        "id": "Extension.id",
        "path": "Extension.id",
        "max": "0"
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://mpd.noma.no/identifier/unii-code"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "type": [
          {
            "code": "Identifier"
          }
        ]
      },
      {
        "id": "Extension.value[x].id",
        "path": "Extension.value[x].id",
        "max": "0"
      },
      {
        "id": "Extension.value[x].use",
        "path": "Extension.value[x].use",
        "max": "0"
      },
      {
        "id": "Extension.value[x].type",
        "path": "Extension.value[x].type",
        "max": "0"
      },
      {
        "id": "Extension.value[x].system",
        "path": "Extension.value[x].system",
        "min": 1
      },
      {
        "id": "Extension.value[x].value",
        "path": "Extension.value[x].value",
        "min": 1
      },
      {
        "id": "Extension.value[x].assigner",
        "path": "Extension.value[x].assigner",
        "max": "0"
      }
    ]
  }
}