{
  "resourceType" : "StructureDefinition",
  "id" : "alternative-result-laboratory-extension",
  "language" : "de",
  "url" : "https://gematik.de/fhir/ti/StructureDefinition/alternative-result-laboratory-extension",
  "version" : "1.5.0",
  "name" : "AlternativeResultLaboratoryExtension",
  "title" : "Messergebnis Alternative Einheit",
  "status" : "active",
  "experimental" : false,
  "date" : "2026-11-16",
  "publisher" : "gematik GmbH",
  "contact" : [{
    "name" : "gematik GmbH",
    "telecom" : [{
      "system" : "url",
      "value" : "https://www.gematik.de"
    },
    {
      "system" : "email",
      "value" : "patientteam [ at ] gematik.de"
    }]
  }],
  "description" : "Diese Extension bildet das Resultat einer Laboruntersuchung mit einer Alternativeinheit ab.",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "urn:iso:std:iso:3166",
      "code" : "DE"
    }]
  }],
  "copyright" : "gematik GmbH / Dieses Artefakt ist lizenziert unter [Apache License](./license.html), Version 2.0.",
  "fhirVersion" : "4.0.1",
  "mapping" : [{
    "identity" : "rim",
    "uri" : "http://hl7.org/v3",
    "name" : "RIM Mapping"
  }],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "type" : "element",
    "expression" : "Observation"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "snapshot" : {
    "extension" : [{
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
      "valueString" : "4.0.1"
    }],
    "element" : [{
      "id" : "Extension",
      "path" : "Extension",
      "short" : "Messergebnis Alternative Einheit",
      "definition" : "Diese Extension bildet das Resultat einer Laboruntersuchung mit einer Alternativeinheit ab.",
      "min" : 0,
      "max" : "*",
      "base" : {
        "path" : "Extension",
        "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" : "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"
      }],
      "isModifier" : false
    },
    {
      "id" : "Extension.id",
      "path" : "Extension.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension",
      "path" : "Extension.extension",
      "slicing" : {
        "discriminator" : [{
          "type" : "value",
          "path" : "url"
        }],
        "description" : "Extensions are always sliced by (at least) url",
        "rules" : "open"
      },
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 2,
      "max" : "*",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:code",
      "path" : "Extension.extension",
      "sliceName" : "code",
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:code.id",
      "path" : "Extension.extension.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:code.extension",
      "path" : "Extension.extension.extension",
      "slicing" : {
        "discriminator" : [{
          "type" : "value",
          "path" : "url"
        }],
        "description" : "Extensions are always sliced by (at least) url",
        "rules" : "open"
      },
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 0,
      "max" : "0",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:code.url",
      "path" : "Extension.extension.url",
      "representation" : ["xmlAttr"],
      "short" : "identifies the meaning of the extension",
      "definition" : "Source of the definition for the extension code - a logical name or a URL.",
      "comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.url",
        "min" : 1,
        "max" : "1"
      },
      "type" : [{
        "extension" : [{
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl" : "uri"
        }],
        "code" : "http://hl7.org/fhirpath/System.String"
      }],
      "fixedUri" : "code",
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:code.value[x]",
      "path" : "Extension.extension.value[x]",
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.value[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "CodeableConcept"
      }],
      "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" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:code.value[x].id",
      "path" : "Extension.extension.value[x].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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:code.value[x].extension",
      "path" : "Extension.extension.value[x].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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:code.value[x].coding",
      "path" : "Extension.extension.value[x].coding",
      "short" : "Code defined by a terminology system",
      "definition" : "A reference to a code defined by a terminology system.",
      "comment" : "Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information.  Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true.",
      "requirements" : "Allows for alternative encodings within a code system, and translations to other code systems.",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "CodeableConcept.coding",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Coding"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "v2",
        "map" : "CE/CNE/CWE subset one of the sets of component 1-3 or 4-6"
      },
      {
        "identity" : "rim",
        "map" : "CV"
      },
      {
        "identity" : "orim",
        "map" : "fhir:Coding rdfs:subClassOf dt:CDCoding"
      },
      {
        "identity" : "v2",
        "map" : "C*E.1-8, C*E.10-22"
      },
      {
        "identity" : "rim",
        "map" : "union(., ./translation)"
      },
      {
        "identity" : "orim",
        "map" : "fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding"
      }]
    },
    {
      "id" : "Extension.extension:code.value[x].text",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].text",
      "short" : "Plain text representation of the concept",
      "definition" : "A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user.",
      "comment" : "Very often the text is the same as a displayName of one of the codings.",
      "requirements" : "The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "CodeableConcept.text",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "C*E.9. But note many systems use C*E.2 for this"
      },
      {
        "identity" : "rim",
        "map" : "./originalText[mediaType/code=\"text/plain\"]/data"
      },
      {
        "identity" : "orim",
        "map" : "fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText"
      }]
    },
    {
      "id" : "Extension.extension:value",
      "path" : "Extension.extension",
      "sliceName" : "value",
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:value.id",
      "path" : "Extension.extension.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.extension",
      "path" : "Extension.extension.extension",
      "slicing" : {
        "discriminator" : [{
          "type" : "value",
          "path" : "url"
        }],
        "description" : "Extensions are always sliced by (at least) url",
        "rules" : "open"
      },
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 0,
      "max" : "0",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:value.url",
      "path" : "Extension.extension.url",
      "representation" : ["xmlAttr"],
      "short" : "identifies the meaning of the extension",
      "definition" : "Source of the definition for the extension code - a logical name or a URL.",
      "comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.url",
        "min" : 1,
        "max" : "1"
      },
      "type" : [{
        "extension" : [{
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl" : "uri"
        }],
        "code" : "http://hl7.org/fhirpath/System.String"
      }],
      "fixedUri" : "value",
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]",
      "path" : "Extension.extension.value[x]",
      "slicing" : {
        "discriminator" : [{
          "type" : "type",
          "path" : "$this"
        }],
        "ordered" : false,
        "rules" : "closed"
      },
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.value[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity"
      },
      {
        "code" : "Range"
      },
      {
        "code" : "Ratio"
      }],
      "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" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity",
      "path" : "Extension.extension.value[x]",
      "sliceName" : "valueQuantity",
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Extension.value[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity"
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      },
      "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" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.id",
      "path" : "Extension.extension.value[x].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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.extension",
      "path" : "Extension.extension.value[x].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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.value",
      "path" : "Extension.extension.value[x].value",
      "short" : "Numerical value (with implicit precision)",
      "definition" : "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
      "comment" : "The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "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" : "Extension.extension:value.value[x]:valueQuantity.comparator",
      "path" : "Extension.extension.value[x].comparator",
      "short" : "< | <= | >= | > - how to understand the value",
      "definition" : "How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is \"<\" , then the real value is < stated value.",
      "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" : "1",
      "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",
      "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" : "v2",
        "map" : "SN.1  / CQ.1"
      },
      {
        "identity" : "rim",
        "map" : "IVL properties"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.unit",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].unit",
      "short" : "Unit representation",
      "definition" : "A human-readable form of the unit.",
      "comment" : "Note that FHIR strings SHALL NOT exceed 1MB in size",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Quantity.unit",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.unit"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.system",
      "path" : "Extension.extension.value[x].system",
      "short" : "System that defines coded unit form",
      "definition" : "The identification of the system that provides the coded form of the unit.",
      "comment" : "see http://en.wikipedia.org/wiki/Uniform_resource_identifier",
      "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" : ["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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "CO.codeSystem, PQ.translation.codeSystem"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.code",
      "path" : "Extension.extension.value[x].code",
      "short" : "Coded form of the unit",
      "definition" : "A computer processable form of the unit in some unit representation system.",
      "comment" : "The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.code, MO.currency, PQ.translation.code"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange",
      "path" : "Extension.extension.value[x]",
      "sliceName" : "valueRange",
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Extension.value[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Range"
      }],
      "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" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.id",
      "path" : "Extension.extension.value[x].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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.extension",
      "path" : "Extension.extension.value[x].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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low",
      "path" : "Extension.extension.value[x].low",
      "short" : "Low limit",
      "definition" : "The low limit. The boundary is inclusive.",
      "comment" : "If the low element is missing, the low boundary is not known.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Range.low",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity",
        "profile" : ["http://hl7.org/fhir/StructureDefinition/SimpleQuantity|4.0.1"]
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      },
      "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,
      "isSummary" : true,
      "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"
      },
      {
        "identity" : "v2",
        "map" : "NR.1"
      },
      {
        "identity" : "rim",
        "map" : "./low"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.id",
      "path" : "Extension.extension.value[x].low.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.extension",
      "path" : "Extension.extension.value[x].low.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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.value",
      "path" : "Extension.extension.value[x].low.value",
      "short" : "Numerical value (with implicit precision)",
      "definition" : "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
      "comment" : "The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "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" : "Extension.extension:value.value[x]:valueRange.low.comparator",
      "path" : "Extension.extension.value[x].low.comparator",
      "short" : "< | <= | >= | > - how to understand the value",
      "definition" : "Not allowed to be used in this context",
      "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",
      "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" : "v2",
        "map" : "SN.1  / CQ.1"
      },
      {
        "identity" : "rim",
        "map" : "IVL properties"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.unit",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].low.unit",
      "short" : "Unit representation",
      "definition" : "A human-readable form of the unit.",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Quantity.unit",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.unit"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.system",
      "path" : "Extension.extension.value[x].low.system",
      "short" : "System that defines coded unit form",
      "definition" : "The identification of the system that provides the coded form of the unit.",
      "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" : ["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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "CO.codeSystem, PQ.translation.codeSystem"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.code",
      "path" : "Extension.extension.value[x].low.code",
      "short" : "Coded form of the unit",
      "definition" : "A computer processable form of the unit in some unit representation system.",
      "comment" : "The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.code, MO.currency, PQ.translation.code"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high",
      "path" : "Extension.extension.value[x].high",
      "short" : "High limit",
      "definition" : "The high limit. The boundary is inclusive.",
      "comment" : "If the high element is missing, the high boundary is not known.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Range.high",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity",
        "profile" : ["http://hl7.org/fhir/StructureDefinition/SimpleQuantity|4.0.1"]
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      },
      "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,
      "isSummary" : true,
      "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"
      },
      {
        "identity" : "v2",
        "map" : "NR.2"
      },
      {
        "identity" : "rim",
        "map" : "./high"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.id",
      "path" : "Extension.extension.value[x].high.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.extension",
      "path" : "Extension.extension.value[x].high.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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.value",
      "path" : "Extension.extension.value[x].high.value",
      "short" : "Numerical value (with implicit precision)",
      "definition" : "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
      "comment" : "The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "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" : "Extension.extension:value.value[x]:valueRange.high.comparator",
      "path" : "Extension.extension.value[x].high.comparator",
      "short" : "< | <= | >= | > - how to understand the value",
      "definition" : "Not allowed to be used in this context",
      "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",
      "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" : "v2",
        "map" : "SN.1  / CQ.1"
      },
      {
        "identity" : "rim",
        "map" : "IVL properties"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.unit",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].high.unit",
      "short" : "Unit representation",
      "definition" : "A human-readable form of the unit.",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Quantity.unit",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.unit"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.system",
      "path" : "Extension.extension.value[x].high.system",
      "short" : "System that defines coded unit form",
      "definition" : "The identification of the system that provides the coded form of the unit.",
      "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" : ["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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "CO.codeSystem, PQ.translation.codeSystem"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.code",
      "path" : "Extension.extension.value[x].high.code",
      "short" : "Coded form of the unit",
      "definition" : "A computer processable form of the unit in some unit representation system.",
      "comment" : "The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.code, MO.currency, PQ.translation.code"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio",
      "path" : "Extension.extension.value[x]",
      "sliceName" : "valueRatio",
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Extension.value[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Ratio"
      }],
      "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" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.id",
      "path" : "Extension.extension.value[x].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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.extension",
      "path" : "Extension.extension.value[x].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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator",
      "path" : "Extension.extension.value[x].numerator",
      "short" : "Numerator value",
      "definition" : "The value of the numerator.",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Ratio.numerator",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity"
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      },
      "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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "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"
      },
      {
        "identity" : "rim",
        "map" : ".numerator"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.id",
      "path" : "Extension.extension.value[x].numerator.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.extension",
      "path" : "Extension.extension.value[x].numerator.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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.value",
      "path" : "Extension.extension.value[x].numerator.value",
      "short" : "Numerical value (with implicit precision)",
      "definition" : "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
      "comment" : "The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "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" : "Extension.extension:value.value[x]:valueRatio.numerator.comparator",
      "path" : "Extension.extension.value[x].numerator.comparator",
      "short" : "< | <= | >= | > - how to understand the value",
      "definition" : "How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is \"<\" , then the real value is < stated value.",
      "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" : "1",
      "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",
      "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" : "v2",
        "map" : "SN.1  / CQ.1"
      },
      {
        "identity" : "rim",
        "map" : "IVL properties"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.unit",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].numerator.unit",
      "short" : "Unit representation",
      "definition" : "A human-readable form of the unit.",
      "comment" : "Note that FHIR strings SHALL NOT exceed 1MB in size",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Quantity.unit",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.unit"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.system",
      "path" : "Extension.extension.value[x].numerator.system",
      "short" : "System that defines coded unit form",
      "definition" : "The identification of the system that provides the coded form of the unit.",
      "comment" : "see http://en.wikipedia.org/wiki/Uniform_resource_identifier",
      "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" : ["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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "CO.codeSystem, PQ.translation.codeSystem"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.code",
      "path" : "Extension.extension.value[x].numerator.code",
      "short" : "Coded form of the unit",
      "definition" : "A computer processable form of the unit in some unit representation system.",
      "comment" : "The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.code, MO.currency, PQ.translation.code"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator",
      "path" : "Extension.extension.value[x].denominator",
      "short" : "Denominator value",
      "definition" : "The value of the denominator.",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Ratio.denominator",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity"
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      },
      "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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "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"
      },
      {
        "identity" : "rim",
        "map" : ".denominator"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.id",
      "path" : "Extension.extension.value[x].denominator.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.extension",
      "path" : "Extension.extension.value[x].denominator.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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.value",
      "path" : "Extension.extension.value[x].denominator.value",
      "short" : "Numerical value (with implicit precision)",
      "definition" : "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
      "comment" : "The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "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" : "Extension.extension:value.value[x]:valueRatio.denominator.comparator",
      "path" : "Extension.extension.value[x].denominator.comparator",
      "short" : "< | <= | >= | > - how to understand the value",
      "definition" : "How the value should be understood and represented - whether the actual value is greater or less than the stated value due to measurement issues; e.g. if the comparator is \"<\" , then the real value is < stated value.",
      "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" : "1",
      "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",
      "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" : "v2",
        "map" : "SN.1  / CQ.1"
      },
      {
        "identity" : "rim",
        "map" : "IVL properties"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.unit",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].denominator.unit",
      "short" : "Unit representation",
      "definition" : "A human-readable form of the unit.",
      "comment" : "Note that FHIR strings SHALL NOT exceed 1MB in size",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Quantity.unit",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.unit"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.system",
      "path" : "Extension.extension.value[x].denominator.system",
      "short" : "System that defines coded unit form",
      "definition" : "The identification of the system that provides the coded form of the unit.",
      "comment" : "see http://en.wikipedia.org/wiki/Uniform_resource_identifier",
      "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" : ["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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "CO.codeSystem, PQ.translation.codeSystem"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.code",
      "path" : "Extension.extension.value[x].denominator.code",
      "short" : "Coded form of the unit",
      "definition" : "A computer processable form of the unit in some unit representation system.",
      "comment" : "The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.code, MO.currency, PQ.translation.code"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange",
      "path" : "Extension.extension",
      "sliceName" : "referenceRange",
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:referenceRange.id",
      "path" : "Extension.extension.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.extension",
      "path" : "Extension.extension.extension",
      "slicing" : {
        "discriminator" : [{
          "type" : "value",
          "path" : "url"
        }],
        "description" : "Extensions are always sliced by (at least) url",
        "rules" : "open"
      },
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 0,
      "max" : "0",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:referenceRange.url",
      "path" : "Extension.extension.url",
      "representation" : ["xmlAttr"],
      "short" : "identifies the meaning of the extension",
      "definition" : "Source of the definition for the extension code - a logical name or a URL.",
      "comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.url",
        "min" : 1,
        "max" : "1"
      },
      "type" : [{
        "extension" : [{
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl" : "uri"
        }],
        "code" : "http://hl7.org/fhirpath/System.String"
      }],
      "fixedUri" : "referenceRange",
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x]",
      "path" : "Extension.extension.value[x]",
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.value[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Range"
      }],
      "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" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].id",
      "path" : "Extension.extension.value[x].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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].extension",
      "path" : "Extension.extension.value[x].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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low",
      "path" : "Extension.extension.value[x].low",
      "short" : "Low limit",
      "definition" : "The low limit. The boundary is inclusive.",
      "comment" : "If the low element is missing, the low boundary is not known.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Range.low",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity",
        "profile" : ["http://hl7.org/fhir/StructureDefinition/SimpleQuantity|4.0.1"]
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      },
      "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,
      "isSummary" : true,
      "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"
      },
      {
        "identity" : "v2",
        "map" : "NR.1"
      },
      {
        "identity" : "rim",
        "map" : "./low"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.id",
      "path" : "Extension.extension.value[x].low.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.extension",
      "path" : "Extension.extension.value[x].low.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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.value",
      "path" : "Extension.extension.value[x].low.value",
      "short" : "Numerical value (with implicit precision)",
      "definition" : "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
      "comment" : "The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "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" : "Extension.extension:referenceRange.value[x].low.comparator",
      "path" : "Extension.extension.value[x].low.comparator",
      "short" : "< | <= | >= | > - how to understand the value",
      "definition" : "Not allowed to be used in this context",
      "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",
      "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" : "v2",
        "map" : "SN.1  / CQ.1"
      },
      {
        "identity" : "rim",
        "map" : "IVL properties"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.unit",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].low.unit",
      "short" : "Unit representation",
      "definition" : "A human-readable form of the unit.",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Quantity.unit",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.unit"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.system",
      "path" : "Extension.extension.value[x].low.system",
      "short" : "System that defines coded unit form",
      "definition" : "The identification of the system that provides the coded form of the unit.",
      "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" : ["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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "CO.codeSystem, PQ.translation.codeSystem"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.code",
      "path" : "Extension.extension.value[x].low.code",
      "short" : "Coded form of the unit",
      "definition" : "A computer processable form of the unit in some unit representation system.",
      "comment" : "The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.code, MO.currency, PQ.translation.code"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high",
      "path" : "Extension.extension.value[x].high",
      "short" : "High limit",
      "definition" : "The high limit. The boundary is inclusive.",
      "comment" : "If the high element is missing, the high boundary is not known.",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Range.high",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "Quantity",
        "profile" : ["http://hl7.org/fhir/StructureDefinition/SimpleQuantity|4.0.1"]
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      },
      "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,
      "isSummary" : true,
      "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"
      },
      {
        "identity" : "v2",
        "map" : "NR.2"
      },
      {
        "identity" : "rim",
        "map" : "./high"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.id",
      "path" : "Extension.extension.value[x].high.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.extension",
      "path" : "Extension.extension.value[x].high.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"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.value",
      "path" : "Extension.extension.value[x].high.value",
      "short" : "Numerical value (with implicit precision)",
      "definition" : "The value of the measured amount. The value includes an implicit precision in the presentation of the value.",
      "comment" : "The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "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" : "Extension.extension:referenceRange.value[x].high.comparator",
      "path" : "Extension.extension.value[x].high.comparator",
      "short" : "< | <= | >= | > - how to understand the value",
      "definition" : "Not allowed to be used in this context",
      "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",
      "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" : "v2",
        "map" : "SN.1  / CQ.1"
      },
      {
        "identity" : "rim",
        "map" : "IVL properties"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.unit",
      "extension" : [{
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
        "valueBoolean" : true
      }],
      "path" : "Extension.extension.value[x].high.unit",
      "short" : "Unit representation",
      "definition" : "A human-readable form of the unit.",
      "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" : 1,
      "max" : "1",
      "base" : {
        "path" : "Quantity.unit",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "string"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.unit"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.system",
      "path" : "Extension.extension.value[x].high.system",
      "short" : "System that defines coded unit form",
      "definition" : "The identification of the system that provides the coded form of the unit.",
      "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" : ["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"
      }],
      "isModifier" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "CO.codeSystem, PQ.translation.codeSystem"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.code",
      "path" : "Extension.extension.value[x].high.code",
      "short" : "Coded form of the unit",
      "definition" : "A computer processable form of the unit in some unit representation system.",
      "comment" : "The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.",
      "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"
      }],
      "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" : false,
      "isSummary" : true,
      "mapping" : [{
        "identity" : "v2",
        "map" : "(see OBX.6 etc.) / CQ.2"
      },
      {
        "identity" : "rim",
        "map" : "PQ.code, MO.currency, PQ.translation.code"
      }]
    },
    {
      "id" : "Extension.extension:zlog",
      "path" : "Extension.extension",
      "sliceName" : "zlog",
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 0,
      "max" : "1",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:zlog.id",
      "path" : "Extension.extension.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"
      }],
      "isModifier" : false,
      "isSummary" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      }]
    },
    {
      "id" : "Extension.extension:zlog.extension",
      "path" : "Extension.extension.extension",
      "slicing" : {
        "discriminator" : [{
          "type" : "value",
          "path" : "url"
        }],
        "description" : "Extensions are always sliced by (at least) url",
        "rules" : "open"
      },
      "short" : "Extension",
      "definition" : "An Extension",
      "min" : 0,
      "max" : "0",
      "base" : {
        "path" : "Element.extension",
        "min" : 0,
        "max" : "*"
      },
      "type" : [{
        "code" : "Extension"
      }],
      "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"
      }],
      "isModifier" : false,
      "isSummary" : false
    },
    {
      "id" : "Extension.extension:zlog.url",
      "path" : "Extension.extension.url",
      "representation" : ["xmlAttr"],
      "short" : "identifies the meaning of the extension",
      "definition" : "Source of the definition for the extension code - a logical name or a URL.",
      "comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.url",
        "min" : 1,
        "max" : "1"
      },
      "type" : [{
        "extension" : [{
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl" : "uri"
        }],
        "code" : "http://hl7.org/fhirpath/System.String"
      }],
      "fixedUri" : "zlog",
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.extension:zlog.value[x]",
      "path" : "Extension.extension.value[x]",
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.value[x]",
        "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"
      }],
      "isModifier" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.url",
      "path" : "Extension.url",
      "representation" : ["xmlAttr"],
      "short" : "identifies the meaning of the extension",
      "definition" : "Source of the definition for the extension code - a logical name or a URL.",
      "comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "min" : 1,
      "max" : "1",
      "base" : {
        "path" : "Extension.url",
        "min" : 1,
        "max" : "1"
      },
      "type" : [{
        "extension" : [{
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl" : "uri"
        }],
        "code" : "http://hl7.org/fhirpath/System.String"
      }],
      "fixedUri" : "https://gematik.de/fhir/ti/StructureDefinition/alternative-result-laboratory-extension",
      "mapping" : [{
        "identity" : "rim",
        "map" : "N/A"
      }]
    },
    {
      "id" : "Extension.value[x]",
      "path" : "Extension.value[x]",
      "short" : "Value of extension",
      "definition" : "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list).",
      "min" : 0,
      "max" : "0",
      "base" : {
        "path" : "Extension.value[x]",
        "min" : 0,
        "max" : "1"
      },
      "type" : [{
        "code" : "base64Binary"
      },
      {
        "code" : "boolean"
      },
      {
        "code" : "canonical"
      },
      {
        "code" : "code"
      },
      {
        "code" : "date"
      },
      {
        "code" : "dateTime"
      },
      {
        "code" : "decimal"
      },
      {
        "code" : "id"
      },
      {
        "code" : "instant"
      },
      {
        "code" : "integer"
      },
      {
        "code" : "markdown"
      },
      {
        "code" : "oid"
      },
      {
        "code" : "positiveInt"
      },
      {
        "code" : "string"
      },
      {
        "code" : "time"
      },
      {
        "code" : "unsignedInt"
      },
      {
        "code" : "uri"
      },
      {
        "code" : "url"
      },
      {
        "code" : "uuid"
      },
      {
        "code" : "Address"
      },
      {
        "code" : "Age"
      },
      {
        "code" : "Annotation"
      },
      {
        "code" : "Attachment"
      },
      {
        "code" : "CodeableConcept"
      },
      {
        "code" : "Coding"
      },
      {
        "code" : "ContactPoint"
      },
      {
        "code" : "Count"
      },
      {
        "code" : "Distance"
      },
      {
        "code" : "Duration"
      },
      {
        "code" : "HumanName"
      },
      {
        "code" : "Identifier"
      },
      {
        "code" : "Money"
      },
      {
        "code" : "Period"
      },
      {
        "code" : "Quantity"
      },
      {
        "code" : "Range"
      },
      {
        "code" : "Ratio"
      },
      {
        "code" : "Reference"
      },
      {
        "code" : "SampledData"
      },
      {
        "code" : "Signature"
      },
      {
        "code" : "Timing"
      },
      {
        "code" : "ContactDetail"
      },
      {
        "code" : "Contributor"
      },
      {
        "code" : "DataRequirement"
      },
      {
        "code" : "Expression"
      },
      {
        "code" : "ParameterDefinition"
      },
      {
        "code" : "RelatedArtifact"
      },
      {
        "code" : "TriggerDefinition"
      },
      {
        "code" : "UsageContext"
      },
      {
        "code" : "Dosage"
      },
      {
        "code" : "Meta"
      }],
      "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" : false,
      "mapping" : [{
        "identity" : "rim",
        "map" : "n/a"
      },
      {
        "identity" : "rim",
        "map" : "N/A"
      }]
    }]
  },
  "differential" : {
    "element" : [{
      "id" : "Extension",
      "path" : "Extension",
      "short" : "Messergebnis Alternative Einheit",
      "definition" : "Diese Extension bildet das Resultat einer Laboruntersuchung mit einer Alternativeinheit ab."
    },
    {
      "id" : "Extension.extension",
      "path" : "Extension.extension",
      "min" : 2
    },
    {
      "id" : "Extension.extension:code",
      "path" : "Extension.extension",
      "sliceName" : "code",
      "min" : 1,
      "max" : "1"
    },
    {
      "id" : "Extension.extension:code.extension",
      "path" : "Extension.extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.extension:code.url",
      "path" : "Extension.extension.url",
      "fixedUri" : "code"
    },
    {
      "id" : "Extension.extension:code.value[x]",
      "path" : "Extension.extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "CodeableConcept"
      }]
    },
    {
      "id" : "Extension.extension:code.value[x].coding",
      "path" : "Extension.extension.value[x].coding",
      "min" : 1,
      "max" : "1"
    },
    {
      "id" : "Extension.extension:value",
      "path" : "Extension.extension",
      "sliceName" : "value",
      "min" : 1,
      "max" : "1"
    },
    {
      "id" : "Extension.extension:value.extension",
      "path" : "Extension.extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.extension:value.url",
      "path" : "Extension.extension.url",
      "fixedUri" : "value"
    },
    {
      "id" : "Extension.extension:value.value[x]",
      "path" : "Extension.extension.value[x]",
      "slicing" : {
        "discriminator" : [{
          "type" : "type",
          "path" : "$this"
        }],
        "ordered" : false,
        "rules" : "open"
      },
      "min" : 1,
      "type" : [{
        "code" : "Quantity"
      },
      {
        "code" : "Range"
      },
      {
        "code" : "Ratio"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity",
      "path" : "Extension.extension.value[x]",
      "sliceName" : "valueQuantity",
      "min" : 0,
      "max" : "1",
      "type" : [{
        "code" : "Quantity"
      }],
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      }
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.value",
      "path" : "Extension.extension.value[x].value",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.unit",
      "path" : "Extension.extension.value[x].unit",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.system",
      "path" : "Extension.extension.value[x].system",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueQuantity.code",
      "path" : "Extension.extension.value[x].code",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange",
      "path" : "Extension.extension.value[x]",
      "sliceName" : "valueRange",
      "min" : 0,
      "max" : "1",
      "type" : [{
        "code" : "Range"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low",
      "path" : "Extension.extension.value[x].low",
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      }
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.value",
      "path" : "Extension.extension.value[x].low.value",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.unit",
      "path" : "Extension.extension.value[x].low.unit",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.system",
      "path" : "Extension.extension.value[x].low.system",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.low.code",
      "path" : "Extension.extension.value[x].low.code",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high",
      "path" : "Extension.extension.value[x].high",
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      }
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.value",
      "path" : "Extension.extension.value[x].high.value",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.unit",
      "path" : "Extension.extension.value[x].high.unit",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.system",
      "path" : "Extension.extension.value[x].high.system",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRange.high.code",
      "path" : "Extension.extension.value[x].high.code",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio",
      "path" : "Extension.extension.value[x]",
      "sliceName" : "valueRatio",
      "min" : 0,
      "max" : "1",
      "type" : [{
        "code" : "Ratio"
      }]
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator",
      "path" : "Extension.extension.value[x].numerator",
      "min" : 1,
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      }
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.value",
      "path" : "Extension.extension.value[x].numerator.value",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.unit",
      "path" : "Extension.extension.value[x].numerator.unit",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.system",
      "path" : "Extension.extension.value[x].numerator.system",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.numerator.code",
      "path" : "Extension.extension.value[x].numerator.code",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator",
      "path" : "Extension.extension.value[x].denominator",
      "min" : 1,
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      }
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.value",
      "path" : "Extension.extension.value[x].denominator.value",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.unit",
      "path" : "Extension.extension.value[x].denominator.unit",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.system",
      "path" : "Extension.extension.value[x].denominator.system",
      "min" : 1
    },
    {
      "id" : "Extension.extension:value.value[x]:valueRatio.denominator.code",
      "path" : "Extension.extension.value[x].denominator.code",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange",
      "path" : "Extension.extension",
      "sliceName" : "referenceRange",
      "min" : 0,
      "max" : "1"
    },
    {
      "id" : "Extension.extension:referenceRange.extension",
      "path" : "Extension.extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.extension:referenceRange.url",
      "path" : "Extension.extension.url",
      "fixedUri" : "referenceRange"
    },
    {
      "id" : "Extension.extension:referenceRange.value[x]",
      "path" : "Extension.extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "Range"
      }]
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low",
      "path" : "Extension.extension.value[x].low",
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      }
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.value",
      "path" : "Extension.extension.value[x].low.value",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.unit",
      "path" : "Extension.extension.value[x].low.unit",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.system",
      "path" : "Extension.extension.value[x].low.system",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].low.code",
      "path" : "Extension.extension.value[x].low.code",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high",
      "path" : "Extension.extension.value[x].high",
      "patternQuantity" : {
        "system" : "http://unitsofmeasure.org"
      }
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.value",
      "path" : "Extension.extension.value[x].high.value",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.unit",
      "path" : "Extension.extension.value[x].high.unit",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.system",
      "path" : "Extension.extension.value[x].high.system",
      "min" : 1
    },
    {
      "id" : "Extension.extension:referenceRange.value[x].high.code",
      "path" : "Extension.extension.value[x].high.code",
      "min" : 1
    },
    {
      "id" : "Extension.extension:zlog",
      "path" : "Extension.extension",
      "sliceName" : "zlog",
      "min" : 0,
      "max" : "1"
    },
    {
      "id" : "Extension.extension:zlog.extension",
      "path" : "Extension.extension.extension",
      "max" : "0"
    },
    {
      "id" : "Extension.extension:zlog.url",
      "path" : "Extension.extension.url",
      "fixedUri" : "zlog"
    },
    {
      "id" : "Extension.extension:zlog.value[x]",
      "path" : "Extension.extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "decimal"
      }]
    },
    {
      "id" : "Extension.url",
      "path" : "Extension.url",
      "fixedUri" : "https://gematik.de/fhir/ti/StructureDefinition/alternative-result-laboratory-extension"
    },
    {
      "id" : "Extension.value[x]",
      "path" : "Extension.value[x]",
      "max" : "0"
    }]
  }
}