HL7 Europe Laboratory Report
2.0.0 - ci-build 150

HL7 Europe Laboratory Report - Downloaded Version 2.0.0 See the Directory of published versions

## Data Type Profile: QuantityEuLab - JSON Profile

Active as of 2026-05-05

JSON representation of the Quantity-eu-lab data type profile.

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    {
      "resourceType" : "StructureDefinition",
      "id" : "Quantity-eu-lab",
      "text" : {
        "status" : "extensions",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: StructureDefinition Quantity-eu-lab</b></p><a name=\"Quantity-eu-lab\"> </a><a name=\"hcQuantity-eu-lab\"> </a><table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" style=\"border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;\"><tr style=\"border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top\"><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"The logical name of the element\">Name</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Information about the use of the element\">Flags</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Minimum and Maximum # of times the element can appear in the instance\">Card.</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px; width: 100px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Reference to the type of the element\">Type</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Additional information about the element\">Description &amp; Constraints</a><span style=\"float: right\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64, \" alt=\"doco\" style=\"background-color: inherit\"/></a></span></th></tr><tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-Quantity-eu-lab-definitions.html#Quantity\" title=\"A measured amount (or an amount that can potentially be measured) and uncertainty of the measurement. Note that measured amounts include amounts that are not precisely quantified, including amounts involving arbitrary units and floating currencies.\r\nThis profile imposes that the code system for units be UCUM.\">Quantity</a><a name=\"Quantity\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">0</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">*</span></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/datatypes.html#Quantity\">Quantity</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">A measured amount using UCUM</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck13.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_slice.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Slice Definition\" class=\"hierarchy\"/> Slices for extension<a name=\"Quantity.extension\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">Content/Rules for all slices</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck134.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vline.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_slicer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_slice_item.png\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Slice Item\" class=\"hierarchy\"/> <a href=\"StructureDefinition-Quantity-eu-lab-definitions.html#Quantity.extension:uncertainty\" title=\"Extension URL = http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty\">extension:uncertainty</a><a name=\"Quantity.extension.2\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/datatypes.html#decimal\">decimal</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Standard Deviation (same units as the quantity)</span><br/><span style=\"font-weight:bold\">URL: </span><a href=\"http://hl7.org/fhir/extensions/5.2.0/StructureDefinition-iso21090-uncertainty.html\">http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty</a></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck124.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vline.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end_slicer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_slice_item.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Slice Item\" class=\"hierarchy\"/> <a href=\"StructureDefinition-Quantity-eu-lab-definitions.html#Quantity.extension:uncertaintyType\" title=\"Extension URL = http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType\">extension:uncertaintyType</a><a name=\"Quantity.extension.3\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R4/datatypes.html#code\">code</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">Probability Distribution Type for uncertainty</span><br/><span style=\"font-weight:bold\">URL: </span><a href=\"http://hl7.org/fhir/extensions/5.2.0/StructureDefinition-iso21090-uncertaintyType.html\">http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType</a><br class=\"binding\"/><span style=\"font-weight:bold\" title=\"null\" class=\"binding\">Binding: </span><a href=\"http://hl7.org/fhir/extensions/5.2.0/ValueSet-probability-distribution-type.html\" title=\"http://hl7.org/fhir/ValueSet/probability-distribution-type\" class=\"binding\">ProbabilityDistributionType</a><span title=\"null\" class=\"binding\"> (</span><a href=\"http://hl7.org/fhir/R4/terminologies.html#required\" title=\"To be conformant, the concept in this element SHALL be from the specified value set.\" class=\"binding\">required</a><span title=\"null\" class=\"binding\">)</span></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck00.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-Quantity-eu-lab-definitions.html#Quantity.system\">system</a><a name=\"Quantity.system\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">0</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">1</span></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5; opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#uri\">uri</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">System that defines coded unit form</span><br/><span style=\"font-weight:bold\">Required Pattern: </span><span style=\"color: darkgreen\">http://unitsofmeasure.org</span></td></tr>\r\n<tr><td colspan=\"5\" class=\"hierarchy\"><br/><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64, \" alt=\"doco\" style=\"background-color: inherit\"/> Documentation for this format</a></td></tr></table></div>"
      },
      "url" : "http://hl7.eu/fhir/laboratory/StructureDefinition/Quantity-eu-lab",
      "version" : "2.0.0",
      "name" : "QuantityEuLab",
      "title" : "Quantity (Eu Lab)",
      "status" : "active",
      "date" : "2026-05-05T16:28:07+02:00",
      "publisher" : "HL7 Europe",
      "contact" : [
        {
          "name" : "HL7 Europe",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://hl7.eu"
            }
          ]
        }
      ],
      "description" : "This profile constrains the Quantity data type to use UCUM for units.\nWhen using the Quantity datatype, the unit is represented using a coded form with UCUM as the system in the code element. The human-readable textual representation is is captured in the unit element.\nIf no suitable UCUM code exists, the code is set to “1”, and the textual unit representation is used.\nIf both coded and textual representations are present, they need to be semantically consistent.",
      "jurisdiction" : [
        {
          "coding" : [
            {
              "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
              "code" : "150",
              "display" : "Europe"
            }
          ]
        }
      ],
      "purpose" : "This profile of the Quantity data type imposes the usage of the UCUM as the code system for units and allows expressing uncertainty of measurement",
      "copyright" : "Copyright HL7 Europe. Licensed under creative commons public domain (CC0 1.0).",
      "fhirVersion" : "4.0.1",
      "mapping" : [
        {
          "identity" : "v2",
          "uri" : "http://hl7.org/v2",
          "name" : "HL7 v2 Mapping"
        },
        {
          "identity" : "rim",
          "uri" : "http://hl7.org/v3",
          "name" : "RIM Mapping"
        }
      ],
      "kind" : "complex-type",
      "abstract" : false,
      "type" : "Quantity",
      "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Quantity",
      "derivation" : "constraint",
      "snapshot" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
            "valueString" : "4.0.1"
          }
        ],
        "element" : [
          {
            "id" : "Quantity",
            "path" : "Quantity",
            "short" : "A measured amount using UCUM",
            "definition" : "A measured amount (or an amount that can potentially be measured) and uncertainty of the measurement. Note that measured amounts include amounts that are not precisely quantified, including amounts involving arbitrary units and floating currencies.\r\nThis profile imposes that the code system for units be UCUM.",
            "comment" : "The use of the UCUM code system for units is required in this profile; however, the code and system elements are not mandatory. A textual and/or coded representation of the unit is nonetheless expected. The uncertainty and uncertaintyType extensions are optional, but they support the expression of measurement uncertainty, which is important for laboratory measurements.",
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "Quantity",
              "min" : 0,
              "max" : "*"
            },
            "condition" : [
              "ele-1"
            ],
            "constraint" : [
              {
                "key" : "ele-1",
                "severity" : "error",
                "human" : "All FHIR elements must have a @value or children",
                "expression" : "hasValue() or (children().count() > id.count())",
                "xpath" : "@value|f:*|h:div",
                "source" : "http://hl7.org/fhir/StructureDefinition/Element"
              },
              {
                "key" : "qty-3",
                "severity" : "error",
                "human" : "If a code for the unit is present, the system SHALL also be present",
                "expression" : "code.empty() or system.exists()",
                "xpath" : "not(exists(f:code)) or exists(f:system)",
                "source" : "http://hl7.org/fhir/StructureDefinition/Quantity"
              }
            ],
            "isModifier" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "n/a"
              },
              {
                "identity" : "v2",
                "map" : "SN (see also Range) or CQ"
              },
              {
                "identity" : "rim",
                "map" : "PQ, IVL<PQ>, MO, CO, depending on the values"
              }
            ]
          },
          {
            "id" : "Quantity.id",
            "path" : "Quantity.id",
            "representation" : [
              "xmlAttr"
            ],
            "short" : "Unique id for inter-element referencing",
            "definition" : "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Element.id",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "extension" : [
                  {
                    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                    "valueUrl" : "string"
                  }
                ],
                "code" : "http://hl7.org/fhirpath/System.String"
              }
            ],
            "isModifier" : false,
            "isSummary" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "n/a"
              }
            ]
          },
          {
            "id" : "Quantity.extension",
            "path" : "Quantity.extension",
            "slicing" : {
              "discriminator" : [
                {
                  "type" : "value",
                  "path" : "url"
                }
              ],
              "description" : "Extensions are always sliced by (at least) url",
              "rules" : "open"
            },
            "short" : "Additional content defined by implementations",
            "definition" : "May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
            "comment" : "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
            "alias" : [
              "extensions",
              "user content"
            ],
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "Element.extension",
              "min" : 0,
              "max" : "*"
            },
            "type" : [
              {
                "code" : "Extension"
              }
            ],
            "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" : "Quantity.extension:uncertainty",
            "path" : "Quantity.extension",
            "sliceName" : "uncertainty",
            "short" : "Standard Deviation (same units as the quantity)",
            "definition" : "The primary measure of variance/uncertainty of the value (the square root of the sum of the squares of the differences between all data points and the mean).",
            "comment" : "standardDeviation has the same units as the quantity. It is used to normalize the data for computing the distribution function. Applications that cannot deal with probability distributions can still get an idea about the confidence level by looking at standardDeviation.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Element.extension",
              "min" : 0,
              "max" : "*"
            },
            "type" : [
              {
                "code" : "Extension",
                "profile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty|5.2.0"
                ]
              }
            ],
            "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" : "PPD.standardDeviation"
              }
            ]
          },
          {
            "id" : "Quantity.extension:uncertaintyType",
            "path" : "Quantity.extension",
            "sliceName" : "uncertaintyType",
            "short" : "Probability Distribution Type for uncertainty",
            "definition" : "A code specifying the type of probability distribution for the uncertainty.",
            "comment" : "This is only meaningful if there is also an uncertainty extension. If there is an uncertainty extension with no type, this means  that the probability distribution type is unknown. In that case, the uncertainty has the meaning of an informal guess.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Element.extension",
              "min" : 0,
              "max" : "*"
            },
            "type" : [
              {
                "code" : "Extension",
                "profile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType|5.2.0"
                ]
              }
            ],
            "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" : "PPD.distributionType"
              }
            ]
          },
          {
            "id" : "Quantity.value",
            "path" : "Quantity.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" : 0,
            "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" : "Quantity.comparator",
            "path" : "Quantity.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" : "Quantity.unit",
            "extension" : [
              {
                "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable",
                "valueBoolean" : true
              }
            ],
            "path" : "Quantity.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" : 0,
            "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" : "Quantity.system",
            "path" : "Quantity.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" : 0,
            "max" : "1",
            "base" : {
              "path" : "Quantity.system",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "uri"
              }
            ],
            "patternUri" : "http://unitsofmeasure.org",
            "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" : "Quantity.code",
            "path" : "Quantity.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" : 0,
            "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"
              }
            ]
          }
        ]
      },
      "differential" : {
        "element" : [
          {
            "id" : "Quantity",
            "path" : "Quantity",
            "short" : "A measured amount using UCUM",
            "definition" : "A measured amount (or an amount that can potentially be measured) and uncertainty of the measurement. Note that measured amounts include amounts that are not precisely quantified, including amounts involving arbitrary units and floating currencies.\r\nThis profile imposes that the code system for units be UCUM.",
            "comment" : "The use of the UCUM code system for units is required in this profile; however, the code and system elements are not mandatory. A textual and/or coded representation of the unit is nonetheless expected. The uncertainty and uncertaintyType extensions are optional, but they support the expression of measurement uncertainty, which is important for laboratory measurements."
          },
          {
            "id" : "Quantity.extension:uncertainty",
            "path" : "Quantity.extension",
            "sliceName" : "uncertainty",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "Extension",
                "profile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/iso21090-uncertainty|5.2.0"
                ]
              }
            ]
          },
          {
            "id" : "Quantity.extension:uncertaintyType",
            "path" : "Quantity.extension",
            "sliceName" : "uncertaintyType",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "Extension",
                "profile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/iso21090-uncertaintyType|5.2.0"
                ]
              }
            ]
          },
          {
            "id" : "Quantity.system",
            "path" : "Quantity.system",
            "patternUri" : "http://unitsofmeasure.org"
          }
        ]
      }
    }