{
  "resourceType": "StructureDefinition",
  "id": "MedicationQuantityDoseForm",
  "url": "https://gematik.de/fhir/isik/StructureDefinition/MedicationQuantityDoseForm",
  "version": "6.0.0-rc",
  "name": "MedicationQuantityDoseForm",
  "title": "Medication Quantity Dose Form",
  "status": "active",
  "experimental": false,
  "date": "2026-04-02",
  "publisher": "gematik GmbH",
  "description": "Quantity Datentyp für Dosage Informationen, der die Nutzung des VS DosageDoseQuantityDE vorgibt.",
  "fhirVersion": "4.0.1",
  "kind": "complex-type",
  "abstract": false,
  "type": "Quantity",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/SimpleQuantity",
  "derivation": "constraint",
  "snapshot": {
    "element": [
      {
        "id": "Quantity",
        "path": "Quantity",
        "short": "A fixed quantity (no comparator)",
        "definition": "The comparator is not used on a SimpleQuantity",
        "comment": "The context of use may frequently define what kind of quantity this is and therefore what kind of units can be used. The context of use may also restrict the values for the comparator.",
        "min": 0,
        "max": "*",
        "base": {
          "path": "Quantity",
          "min": 0,
          "max": "*"
        },
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "qty-3",
            "severity": "error",
            "human": "If a code for the unit is present, the system SHALL also be present",
            "expression": "code.empty() or system.exists()",
            "xpath": "not(exists(f:code)) or exists(f:system)",
            "source": "http://hl7.org/fhir/StructureDefinition/Quantity"
          },
          {
            "key": "sqty-1",
            "severity": "error",
            "human": "The comparator is not used on a SimpleQuantity",
            "expression": "comparator.empty()",
            "xpath": "not(exists(f:comparator))",
            "source": "http://hl7.org/fhir/StructureDefinition/SimpleQuantity"
          }
        ],
        "isModifier": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "SN (see also Range) or CQ"
          },
          {
            "identity": "rim",
            "map": "PQ, IVL<PQ>, MO, CO, depending on the values"
          }
        ]
      },
      {
        "id": "Quantity.id",
        "path": "Quantity.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "string"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Quantity.extension",
        "path": "Quantity.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional content defined by implementations",
        "definition": "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
        "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension"
          }
        ],
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Quantity.value",
        "path": "Quantity.value",
        "short": "Menge der Medikation",
        "definition": "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
        "comment": "Begründung des Must-Support: Basisinformation zur Medikation",
        "requirements": "Precision is handled implicitly in almost all cases of measurement.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Quantity.value",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "decimal"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "mustSupport": true,
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "SN.2  / CQ - N/A"
          },
          {
            "identity": "rim",
            "map": "PQ.value, CO.value, MO.value, IVL.high or IVL.low depending on the value"
          }
        ]
      },
      {
        "id": "Quantity.comparator",
        "path": "Quantity.comparator",
        "short": "< | <= | >= | > - how to understand the value",
        "definition": "Not allowed to be used in this context",
        "comment": "Note that FHIR strings SHALL NOT exceed 1MB in size",
        "requirements": "Need a framework for handling measures where the value is <5ug/L or >400mg/L due to the limitations of measuring methodology.",
        "min": 0,
        "max": "0",
        "base": {
          "path": "Quantity.comparator",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "meaningWhenMissing": "If there is no comparator, then there is no modification of the value",
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "isModifier": true,
        "isModifierReason": "This is labeled as \"Is Modifier\" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value",
        "isSummary": true,
        "binding": {
          "extension": [
            {
              "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
              "valueString": "QuantityComparator"
            }
          ],
          "strength": "required",
          "description": "How the Quantity should be understood and represented.",
          "valueSet": "http://hl7.org/fhir/ValueSet/quantity-comparator|4.0.1"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "SN.1  / CQ.1"
          },
          {
            "identity": "rim",
            "map": "IVL properties"
          }
        ]
      },
      {
        "id": "Quantity.unit",
        "extension": [
          {
            "url": "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
            "valueBoolean": true
          }
        ],
        "path": "Quantity.unit",
        "short": "Einheit der Medikation als String",
        "definition": "A human-readable form of the unit.",
        "comment": "Begründung des Must-Support: Bereitstellung einer menschenlesbaren Darstellung der Einheit.",
        "requirements": "There are many representations for units of measure and in many contexts, particular representations are fixed and required. I.e. mcg for micrograms.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Quantity.unit",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "string"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "mustSupport": true,
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "(see OBX.6 etc.) / CQ.2"
          },
          {
            "identity": "rim",
            "map": "PQ.unit"
          }
        ]
      },
      {
        "id": "Quantity.system",
        "path": "Quantity.system",
        "short": "System der Einheit",
        "definition": "The identification of the system that provides the coded form of the unit.",
        "comment": "Begründung des Must-Support: Zur Interpretation des Codes ist die Angabe des Systems erforderlich.",
        "requirements": "Need to know the system that defines the coded form of the unit.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Quantity.system",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "uri"
          }
        ],
        "condition": [
          "ele-1",
          "qty-3"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "mustSupport": true,
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "(see OBX.6 etc.) / CQ.2"
          },
          {
            "identity": "rim",
            "map": "CO.codeSystem, PQ.translation.codeSystem"
          }
        ]
      },
      {
        "id": "Quantity.code",
        "path": "Quantity.code",
        "short": "Code der Einheit",
        "definition": "A computer processable form of the unit in some unit representation system.",
        "comment": "Begründung des Must-Support: Zur Interpretation der Menge ist der Code erforderlich.",
        "requirements": "Need a computable form of the unit that is fixed across all forms. UCUM provides this for quantities, but SNOMED CT provides many units of interest.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Quantity.code",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "xpath": "@value|f:*|h:div",
            "source": "http://hl7.org/fhir/StructureDefinition/Element"
          }
        ],
        "mustSupport": true,
        "isSummary": true,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          },
          {
            "identity": "v2",
            "map": "(see OBX.6 etc.) / CQ.2"
          },
          {
            "identity": "rim",
            "map": "PQ.code, MO.currency, PQ.translation.code"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Quantity",
        "path": "Quantity",
        "binding": {
          "strength": "required",
          "valueSet": "http://ig.fhir.de/igs/medication/ValueSet/DosageDoseQuantityDE"
        }
      },
      {
        "id": "Quantity.value",
        "path": "Quantity.value",
        "short": "Menge der Medikation",
        "comment": "Begründung des Must-Support: Basisinformation zur Medikation",
        "min": 1,
        "mustSupport": true
      },
      {
        "id": "Quantity.unit",
        "path": "Quantity.unit",
        "short": "Einheit der Medikation als String",
        "comment": "Begründung des Must-Support: Bereitstellung einer menschenlesbaren Darstellung der Einheit.",
        "mustSupport": true
      },
      {
        "id": "Quantity.system",
        "path": "Quantity.system",
        "short": "System der Einheit",
        "comment": "Begründung des Must-Support: Zur Interpretation des Codes ist die Angabe des Systems erforderlich.",
        "min": 1,
        "mustSupport": true
      },
      {
        "id": "Quantity.code",
        "path": "Quantity.code",
        "short": "Code der Einheit",
        "comment": "Begründung des Must-Support: Zur Interpretation der Menge ist der Code erforderlich.",
        "min": 1,
        "mustSupport": true
      }
    ]
  }
}