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Source1

{
  "resourceType": "StructureDefinition",
  "id": "Extension-DataStandardsWales-DocumentAttribute",
  "url": "https://fhir.nhs.wales/StructureDefinition/Extension-DataStandardsWales-DocumentAttribute",
  "version": "0.0.1",
  "name": "ExtensionDataStandardsWalesDocumentAttribute",
  "title": "Extension Data Standards Wales Document Attribute",
  "status": "draft",
  "experimental": true,
  "date": "2025-08-18",
  "publisher": "NHS Wales",
  "contact": [
    {
      "name": "FHIR Standards",
      "telecom": [
        {
          "system": "email",
          "value": "fhir.standards@wales.nhs.uk",
          "use": "work",
          "rank": 1
        }
      ]
    }
  ],
  "description": "This extension shows document attributes.",
  "purpose": "This extension shows document attributes.",
  "copyright": "2025 NHS Wales",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "DocumentReference"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation": "constraint",
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "Additional metadata for the document",
        "definition": "Additional metadata as applicable to the document type.  This element should be used with care to avoid a proliferation of undefined metadata."
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "requirements": "Included for legacy data not explicitly handled via DocumentReference and related resources.",
        "min": 1
      },
      {
        "id": "Extension.extension:attributeName",
        "path": "Extension.extension",
        "sliceName": "attributeName",
        "short": "The name code for the document attribute.",
        "definition": "A formal descriptive code for the document attribute e.g. ShareWithReferrer.",
        "min": 1,
        "max": "1"
      },
      {
        "id": "Extension.extension:attributeName.extension",
        "path": "Extension.extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.extension:attributeName.url",
        "path": "Extension.extension.url",
        "fixedUri": "attributeName"
      },
      {
        "id": "Extension.extension:attributeName.value[x]",
        "path": "Extension.extension.value[x]",
        "type": [
          {
            "code": "code"
          }
        ],
        "binding": {
          "strength": "required",
          "description": "User-readable semantic codes for allowed attributes.  Based on document metadata data held as document attributes in the Welsh Care Records Service and not represented via dedicated elements.",
          "valueSet": "https://fhir.nhs.wales/ValueSet/FHIRStandardsWales-DocumentAttribute"
        }
      },
      {
        "id": "Extension.extension:attributeValue",
        "path": "Extension.extension",
        "sliceName": "attributeValue",
        "short": "The value recorded against the document attribute.",
        "definition": "The value recorded against the document attribute.  This is modelled as a string format for flexibility.  The actual datatype of the value will depend upon the specific document attribute.  For example some may be dates, other integers and others a fixed list of codes.",
        "max": "1"
      },
      {
        "id": "Extension.extension:attributeValue.extension",
        "path": "Extension.extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.extension:attributeValue.url",
        "path": "Extension.extension.url",
        "fixedUri": "attributeValue"
      },
      {
        "id": "Extension.extension:attributeValue.value[x]",
        "path": "Extension.extension.value[x]",
        "min": 1,
        "type": [
          {
            "code": "string"
          }
        ]
      },
      {
        "id": "Extension.extension:attributeNamespace",
        "path": "Extension.extension",
        "sliceName": "attributeNamespace",
        "sliceIsConstraining": false,
        "short": "The namespace associated with the document attribute value.",
        "definition": "The namespace associated with the document attribute value where relevant for the specific document attribute.  Note that for some attributes namespace may vary according to value domain.",
        "max": "1"
      },
      {
        "id": "Extension.extension:attributeNamespace.extension",
        "path": "Extension.extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.extension:attributeNamespace.url",
        "path": "Extension.extension.url",
        "fixedUri": "attributeNamespace"
      },
      {
        "id": "Extension.extension:attributeNamespace.value[x]",
        "path": "Extension.extension.value[x]",
        "type": [
          {
            "code": "string"
          }
        ]
      },
      {
        "id": "Extension.extension:valueDomain",
        "path": "Extension.extension",
        "sliceName": "valueDomain",
        "short": "The specific domain to which the value of the document attribute belongs.",
        "definition": "Some document attributes contain different sets of values for a pre-defined set of domains.  In this case, the value domain provides the context for the value, to provide an unambiguous meaning.",
        "max": "1"
      },
      {
        "id": "Extension.extension:valueDomain.extension",
        "path": "Extension.extension.extension",
        "max": "0"
      },
      {
        "id": "Extension.extension:valueDomain.url",
        "path": "Extension.extension.url",
        "fixedUri": "valueDomain"
      },
      {
        "id": "Extension.extension:valueDomain.value[x]",
        "path": "Extension.extension.value[x]",
        "type": [
          {
            "code": "string"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "fixedUri": "https://fhir.nhs.wales/StructureDefinition/Extension-DataStandardsWales-DocumentAttribute"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "max": "0",
        "type": [
          {
            "code": "string"
          }
        ]
      }
    ]
  }
}