OpenEHR Base package
0.1.0 - First Draft International flag

OpenEHR Base package, published by openEHR + HL7. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/openehr-fhir/base-spec/ and changes regularly. See the Directory of published versions

Logical Model: DV_DURATION - JSON Profile

Page standards status: Informative Maturity Level: 3

JSON representation of the DV-DURATION logical model.

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{
  "resourceType" : "StructureDefinition",
  "id" : "DV-DURATION",
  "text" : {
    "status" : "extensions",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: StructureDefinition DV-DURATION</b></p><a name=\"DV-DURATION\"> </a><a name=\"hcDV-DURATION\"> </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,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3goXBCwdPqAP0wAAAldJREFUOMuNk0tIlFEYhp9z/vE2jHkhxXA0zJCMitrUQlq4lnSltEqCFhFG2MJFhIvIFpkEWaTQqjaWZRkp0g26URZkTpbaaOJkDqk10szoODP//7XIMUe0elcfnPd9zsfLOYplGrpRwZaqTtw3K7PtGem7Q6FoidbGgqHVy/HRb669R+56zx7eRV1L31JGxYbBtjKK93cxeqfyQHbehkZbUkK20goELEuIzEd+dHS+qz/Y8PTSif0FnGkbiwcAjHaU1+QWOptFiyCLp/LnKptpqIuXHx6rbR26kJcBX3yLgBfnd7CxwJmflpP2wUg0HIAoUUpZBmKzELGWcN8nAr6Gpu7tLU/CkwAaoKTWRSQyt89Q8w6J+oVQkKnBoblH7V0PPvUOvDYXfopE/SJmALsxnVm6LbkotrUtNowMeIrVrBcBpaMmdS0j9df7abpSuy7HWehwJdt1lhVwi/J58U5beXGAF6c3UXLycw1wdFklArBn87xdh0ZsZtArghBdAA3+OEDVubG4UEzP6x1FOWneHh2VDAHBAt80IbdXDcesNoCvs3E5AFyNSU5nbrDPZpcUEQQTFZiEVx+51fxMhhyJEAgvlriadIJZZksRuwBYMOPBbO3hePVVqgEJhFeUuFLhIPkRP6BQLIBrmMenujm/3g4zc398awIe90Zb5A1vREALqneMcYgP/xVQWlG+Ncu5vgwwlaUNx+3799rfe96u9K0JSDXcOzOTJg4B6IgmXfsygc7/Bvg9g9E58/cDVmGIBOP/zT8Bz1zqWqpbXIsd0O9hajXfL6u4BaOS6SeWAAAAAElFTkSuQmCC\" 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-DV-DURATION-definitions.html#DV_DURATION\" title=\"Represents a period of time with respect to a notional point in time, which is not specified. A sign may be used to indicate the duration is  backwards  in time rather than forwards. \n\nNOTE: two deviations from ISO 8601 are supported, the first, to allow a negative sign, and the second allowing the 'W' designator to be mixed with other designators. See time types section in the Foundation Types model. \n\nUsed for recording the duration of something in the real world, particularly when there is a need a) to represent the duration in customary format, i.e. days, hours, minutes etc, and b) if it will be used in computational operations with date/time quantities, i.e. additions, subtractions etc. \n\nMisuse: Durations cannot be used to represent points in time, or intervals of time. \">DV_DURATION</a><a name=\"DV_DURATION\"> </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 style=\"padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;; padding-left: 3px; padding-right: 3px; border: 1px maroon solid; font-weight: bold; color: #301212; background-color: #fdf4f4;\" href=\"http://hl7.org/fhir/R5/conformance-rules.html#constraints\" title=\"This element has or is affected by constraints ( Value_valid )\">C</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\">0..*</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=\"StructureDefinition-DV-AMOUNT.html\">DV_AMOUNT</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\">Represents a period of time with respect to a notional point in time, which is not specified.<br/><br/>Elements defined in Ancestors:<a href=\"StructureDefinition-BASIC-DEFINITIONS.html\" title=\"Carriage return character.\">CR</a>, <a href=\"StructureDefinition-BASIC-DEFINITIONS.html\" title=\"Line feed character.\">LF</a>, <a href=\"StructureDefinition-OPENEHR-DEFINITIONS.html\" title=\"Predefined terminology identifier to indicate it is local to the knowledge resource in which it occurs, e.g. an archetype\">Local_terminology_id</a>, <a href=\"StructureDefinition-DV-ORDERED.html\" title=\"Optional normal status indicator of value with respect to normal range for this value. Often included by lab, even if the normal range itself is not included. Coded by ordinals in series HHH, HH, H, (nothing), L, LL, LLL; see openEHR terminology group  `normal_status`. \">normal_status</a>, <a href=\"StructureDefinition-DV-ORDERED.html\" title=\"Optional normal range. \">normal_range</a>, <a href=\"StructureDefinition-DV-ORDERED.html\" title=\"Optional tagged other reference ranges for this value in its particular measurement context.\">other_reference_ranges</a>, <a href=\"StructureDefinition-DV-QUANTIFIED.html\" title=\"Optional status of magnitude with values: \n\n* `&quot;=&quot;`   :   magnitude is a point value \n* `&quot;&lt;&quot;`   :   value is &lt; magnitude \n* `&quot;&gt;&quot;`   :   value is &gt; magnitude \n* `&quot;&lt;=&quot;` : value is &lt;= magnitude \n* `&quot;&gt;=&quot;` : value is &gt;= magnitude \n* `&quot;~&quot;`   :   value is approximately magnitude \n\nIf not present, assumed meaning is  `&quot;=&quot;` . \n\">magnitude_status</a>, <a href=\"StructureDefinition-DV-QUANTIFIED.html\" title=\"Accuracy of measurement. Exact form of expression determined in descendants.\">accuracy</a>, <a href=\"StructureDefinition-DV-AMOUNT.html\" title=\"If `True`, indicates that when this object was created, `_accuracy_` was recorded as a percent value; if `False`, as an absolute quantity value.\">accuracy_is_percent</a>, <a href=\"StructureDefinition-DV-AMOUNT.html\" title=\"Accuracy of measurement, expressed either as a half-range percent value (`_accuracy_is_percent_` = `True`) or a half-range quantity. A value of `0` means that accuracy is 100%, i.e. no error.\n\nA value of `_unknown_accuracy_value_` means that accuracy was not recorded.\">accuracy</a><br class=\"constraint\"/><span title=\"null\" class=\"constraint\">Constraints: </span><span style=\"font-weight:bold\" title=\"Value valid\" class=\"constraint\">Value_valid</span><br/></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_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_primitive.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Primitive Data Type\" class=\"hierarchy\"/> <a href=\"StructureDefinition-DV-DURATION-definitions.html#DV_DURATION.value\" title=\"ISO8601 duration string, including described deviations to support negative values and weeks.\">value</a><a name=\"DV_DURATION.value\"> </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\">1..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/R5/datatypes.html#string\">string</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\">ISO8601 duration string, including described deviations to support negative values and weeks.</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,iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAAABmJLR0QA/wD/AP+gvaeTAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH3goXBCwdPqAP0wAAAldJREFUOMuNk0tIlFEYhp9z/vE2jHkhxXA0zJCMitrUQlq4lnSltEqCFhFG2MJFhIvIFpkEWaTQqjaWZRkp0g26URZkTpbaaOJkDqk10szoODP//7XIMUe0elcfnPd9zsfLOYplGrpRwZaqTtw3K7PtGem7Q6FoidbGgqHVy/HRb669R+56zx7eRV1L31JGxYbBtjKK93cxeqfyQHbehkZbUkK20goELEuIzEd+dHS+qz/Y8PTSif0FnGkbiwcAjHaU1+QWOptFiyCLp/LnKptpqIuXHx6rbR26kJcBX3yLgBfnd7CxwJmflpP2wUg0HIAoUUpZBmKzELGWcN8nAr6Gpu7tLU/CkwAaoKTWRSQyt89Q8w6J+oVQkKnBoblH7V0PPvUOvDYXfopE/SJmALsxnVm6LbkotrUtNowMeIrVrBcBpaMmdS0j9df7abpSuy7HWehwJdt1lhVwi/J58U5beXGAF6c3UXLycw1wdFklArBn87xdh0ZsZtArghBdAA3+OEDVubG4UEzP6x1FOWneHh2VDAHBAt80IbdXDcesNoCvs3E5AFyNSU5nbrDPZpcUEQQTFZiEVx+51fxMhhyJEAgvlriadIJZZksRuwBYMOPBbO3hePVVqgEJhFeUuFLhIPkRP6BQLIBrmMenujm/3g4zc398awIe90Zb5A1vREALqneMcYgP/xVQWlG+Ncu5vgwwlaUNx+3799rfe96u9K0JSDXcOzOTJg4B6IgmXfsygc7/Bvg9g9E58/cDVmGIBOP/zT8Bz1zqWqpbXIsd0O9hajXfL6u4BaOS6SeWAAAAAElFTkSuQmCC\" alt=\"doco\" style=\"background-color: inherit\"/> Documentation for this format</a></td></tr></table></div>"
  },
  "contained" : [
    {
      "resourceType" : "OperationDefinition",
      "id" : "add",
      "name" : "add",
      "title" : "add",
      "status" : "active",
      "kind" : "operation",
      "description" : "Sum of this Duration and `_other_`.",
      "code" : "add",
      "system" : false,
      "instance" : true,
      "parameter" : [
        {
          "name" : "other",
          "use" : "in",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        },
        {
          "name" : "return",
          "use" : "out",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        }
      ]
    },
    {
      "resourceType" : "OperationDefinition",
      "id" : "subtract",
      "name" : "subtract",
      "title" : "subtract",
      "status" : "active",
      "kind" : "operation",
      "description" : "Difference of this Duration and `_other_`.",
      "code" : "subtract",
      "system" : false,
      "instance" : true,
      "parameter" : [
        {
          "name" : "other",
          "use" : "in",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        },
        {
          "name" : "return",
          "use" : "out",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        }
      ]
    },
    {
      "resourceType" : "OperationDefinition",
      "id" : "multiply",
      "name" : "multiply",
      "title" : "multiply",
      "status" : "active",
      "kind" : "operation",
      "description" : "Product of this Duration and `_factor_`.",
      "code" : "multiply",
      "system" : false,
      "instance" : true,
      "parameter" : [
        {
          "name" : "factor",
          "use" : "in",
          "min" : 1,
          "max" : "1",
          "type" : "decimal"
        },
        {
          "name" : "return",
          "use" : "out",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        }
      ]
    },
    {
      "resourceType" : "OperationDefinition",
      "id" : "less_than",
      "name" : "less_than",
      "title" : "less_than",
      "status" : "active",
      "kind" : "operation",
      "description" : "True if this duration object is less than `_other_`, based on comparison of `_magnitude()_`. ",
      "code" : "less_than",
      "system" : false,
      "instance" : true,
      "parameter" : [
        {
          "name" : "other",
          "use" : "in",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        },
        {
          "name" : "return",
          "use" : "out",
          "min" : 1,
          "max" : "1",
          "type" : "boolean"
        }
      ]
    },
    {
      "resourceType" : "OperationDefinition",
      "id" : "is_strictly_comparable_to",
      "name" : "is_strictly_comparable_to",
      "title" : "is_strictly_comparable_to",
      "status" : "active",
      "kind" : "operation",
      "description" : "True, for any two Durations.",
      "code" : "is_strictly_comparable_to",
      "system" : false,
      "instance" : true,
      "parameter" : [
        {
          "name" : "other",
          "use" : "in",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        },
        {
          "name" : "return",
          "use" : "out",
          "min" : 1,
          "max" : "1",
          "type" : "boolean"
        }
      ]
    },
    {
      "resourceType" : "OperationDefinition",
      "id" : "negative",
      "name" : "negative",
      "title" : "negative",
      "status" : "active",
      "kind" : "operation",
      "description" : "Negated version of current duration.\n\nAssuming the current duration is positive, the negated version represents a time prior to some origin point, or a negative age (e.g. so-called 'adjusted age' of premature infant).",
      "code" : "negative",
      "system" : false,
      "instance" : true,
      "parameter" : [
        {
          "name" : "return",
          "use" : "out",
          "min" : 1,
          "max" : "1",
          "type" : "Duration"
        }
      ]
    },
    {
      "resourceType" : "OperationDefinition",
      "id" : "magnitude",
      "name" : "magnitude",
      "title" : "magnitude",
      "status" : "active",
      "kind" : "operation",
      "description" : "Numeric value of the duration as a number of seconds. Computed using the method `_to_seconds()_` inherited from `Iso8601_duration`.",
      "code" : "magnitude",
      "system" : false,
      "instance" : true,
      "parameter" : [
        {
          "name" : "return",
          "use" : "out",
          "min" : 1,
          "max" : "1",
          "type" : "decimal"
        }
      ]
    }
  ],
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/web-source",
      "valueUrl" : "https://specifications.openehr.org/releases/RM/Release-1.1.0/data_types.html#_dv_duration_class"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-operation",
      "valueCanonical" : "#add"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-operation",
      "valueCanonical" : "#subtract"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-operation",
      "valueCanonical" : "#multiply"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-operation",
      "valueCanonical" : "#less_than"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-operation",
      "valueCanonical" : "#is_strictly_comparable_to"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-operation",
      "valueCanonical" : "#negative"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-operation",
      "valueCanonical" : "#magnitude"
    },
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode" : "fhir"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/view-hint",
      "valueCode" : "element-view-as-leaf"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/view-hint",
      "valueCode" : "element-view-defns-parent"
    },
    {
      "url" : "http://hl7.org/fhir/tools/StructureDefinition/view-hint",
      "valueCode" : "element-view-replace-cardinality"
    },
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger" : 3,
      "_valueInteger" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueCanonical" : "http://openehr.org/fhir/ImplementationGuide/openehr.base"
          }
        ]
      }
    },
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode" : "informative",
      "_valueCode" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueCanonical" : "http://openehr.org/fhir/ImplementationGuide/openehr.base"
          }
        ]
      }
    }
  ],
  "url" : "http://openehr.org/fhir/StructureDefinition/DV-DURATION",
  "version" : "0.1.0",
  "name" : "DV_DURATION",
  "title" : "DV_DURATION",
  "status" : "active",
  "experimental" : false,
  "date" : "2025-09-06T15:35:39+10:00",
  "publisher" : "openEHR + HL7",
  "contact" : [
    {
      "telecom" : [
        {
          "system" : "url",
          "value" : "http://www.openehr.org"
        }
      ]
    }
  ],
  "description" : "Represents a period of time with respect to a notional point in time, which is not specified. A sign may be used to indicate the duration is  backwards  in time rather than forwards. \n\nNOTE: two deviations from ISO 8601 are supported, the first, to allow a negative sign, and the second allowing the 'W' designator to be mixed with other designators. See time types section in the Foundation Types model. \n\nUsed for recording the duration of something in the real world, particularly when there is a need a) to represent the duration in customary format, i.e. days, hours, minutes etc, and b) if it will be used in computational operations with date/time quantities, i.e. additions, subtractions etc. \n\nMisuse: Durations cannot be used to represent points in time, or intervals of time. ",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code" : "001"
        }
      ]
    }
  ],
  "fhirVersion" : "5.0.0",
  "mapping" : [
    {
      "identity" : "rim",
      "uri" : "http://hl7.org/v3",
      "name" : "RIM Mapping"
    }
  ],
  "kind" : "logical",
  "abstract" : false,
  "type" : "http://openehr.org/fhir/StructureDefinition/DV_DURATION",
  "baseDefinition" : "http://openehr.org/fhir/StructureDefinition/DV-AMOUNT",
  "derivation" : "specialization",
  "snapshot" : {
    "extension" : [
      {
        "url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
        "valueString" : "0.1.0"
      }
    ],
    "element" : [
      {
        "id" : "DV_DURATION",
        "path" : "DV_DURATION",
        "short" : "Represents a period of time with respect to a notional point in time, which is not specified.",
        "definition" : "Represents a period of time with respect to a notional point in time, which is not specified. A sign may be used to indicate the duration is  backwards  in time rather than forwards. \n\nNOTE: two deviations from ISO 8601 are supported, the first, to allow a negative sign, and the second allowing the 'W' designator to be mixed with other designators. See time types section in the Foundation Types model. \n\nUsed for recording the duration of something in the real world, particularly when there is a need a) to represent the duration in customary format, i.e. days, hours, minutes etc, and b) if it will be used in computational operations with date/time quantities, i.e. additions, subtractions etc. \n\nMisuse: Durations cannot be used to represent points in time, or intervals of time. ",
        "min" : 0,
        "max" : "*",
        "base" : {
          "path" : "Base",
          "min" : 0,
          "max" : "*"
        },
        "constraint" : [
          {
            "key" : "Other_reference_ranges_validity",
            "severity" : "error",
            "human" : "Other reference ranges validity must be present",
            "expression" : "other_reference_ranges.exists() implies other_reference_ranges.empty().not()",
            "source" : "http://openehr.org/fhir/StructureDefinition/DV-ORDERED"
          },
          {
            "key" : "Is_simple_validity",
            "severity" : "error",
            "human" : "Is simple validity must satisfy conditional constraints",
            "expression" : "(normal_range .empty() and other_reference_ranges .empty()) implies is_simple()",
            "source" : "http://openehr.org/fhir/StructureDefinition/DV-ORDERED"
          },
          {
            "key" : "Normal_range_and_status_consistency",
            "severity" : "error",
            "human" : "Normal range and status consistency must be present",
            "expression" : "(normal_range.exists() and normal_status.exists()) implies (normal_status.code_string.is_equal (ā€œNā€) xor normal_range.not().has (self))",
            "source" : "http://openehr.org/fhir/StructureDefinition/DV-ORDERED"
          },
          {
            "key" : "Magnitude_status_valid",
            "severity" : "error",
            "human" : "Magnitude status valid must be present",
            "expression" : "magnitude_status.exists() implies valid_magnitude_status() (magnitude_status)",
            "source" : "http://openehr.org/fhir/StructureDefinition/DV-QUANTIFIED"
          },
          {
            "key" : "Accuracy_is_percent_validity",
            "severity" : "error",
            "human" : "Accuracy is percent validity must satisfy conditional constraints",
            "expression" : "accuracy = 0 implies accuracy_is_percent.not()",
            "source" : "http://openehr.org/fhir/StructureDefinition/DV-AMOUNT"
          },
          {
            "key" : "Accuracy_validity",
            "severity" : "error",
            "human" : "Accuracy validity must satisfy conditional constraints",
            "expression" : "accuracy_is_percent implies valid_percentage() (accuracy)",
            "source" : "http://openehr.org/fhir/StructureDefinition/DV-AMOUNT"
          },
          {
            "key" : "Value_valid",
            "severity" : "error",
            "human" : "Value valid",
            "expression" : "null # TODO: manual translation needed"
          }
        ],
        "isModifier" : false,
        "mapping" : [
          {
            "identity" : "rim",
            "map" : "n/a"
          }
        ]
      },
      {
        "id" : "DV_DURATION.CR",
        "path" : "DV_DURATION.CR",
        "short" : "Carriage return character.",
        "definition" : "Carriage return character.",
        "min" : 1,
        "max" : "1",
        "base" : {
          "path" : "BASIC_DEFINITIONS.CR",
          "min" : 1,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "string"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.LF",
        "path" : "DV_DURATION.LF",
        "short" : "Line feed character.",
        "definition" : "Line feed character.",
        "min" : 1,
        "max" : "1",
        "base" : {
          "path" : "BASIC_DEFINITIONS.LF",
          "min" : 1,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "string"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.Local-terminology-id",
        "path" : "DV_DURATION.Local_terminology_id",
        "short" : "Predefined terminology identifier",
        "definition" : "Predefined terminology identifier to indicate it is local to the knowledge resource in which it occurs, e.g. an archetype",
        "min" : 1,
        "max" : "1",
        "base" : {
          "path" : "OPENEHR_DEFINITIONS.Local_terminology_id",
          "min" : 1,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "string"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.normal-status",
        "path" : "DV_DURATION.normal_status",
        "short" : "Optional normal status indicator of value with respect to normal range for this value.",
        "definition" : "Optional normal status indicator of value with respect to normal range for this value. Often included by lab, even if the normal range itself is not included. Coded by ordinals in series HHH, HH, H, (nothing), L, LL, LLL; see openEHR terminology group  `normal_status`.",
        "min" : 0,
        "max" : "1",
        "base" : {
          "path" : "DV_ORDERED.normal_status",
          "min" : 0,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "http://openehr.org/fhir/StructureDefinition/CODE-PHRASE"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.normal-range",
        "path" : "DV_DURATION.normal_range",
        "short" : "Optional normal range.",
        "definition" : "Optional normal range.",
        "min" : 0,
        "max" : "1",
        "base" : {
          "path" : "DV_ORDERED.normal_range",
          "min" : 0,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "http://openehr.org/fhir/StructureDefinition/DV-INTERVAL"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.other-reference-ranges",
        "path" : "DV_DURATION.other_reference_ranges",
        "short" : "Optional tagged other reference ranges for this value in its particular measurement context.",
        "definition" : "Optional tagged other reference ranges for this value in its particular measurement context.",
        "min" : 0,
        "max" : "*",
        "base" : {
          "path" : "DV_ORDERED.other_reference_ranges",
          "min" : 0,
          "max" : "*"
        },
        "type" : [
          {
            "extension" : [
              {
                "extension" : [
                  {
                    "url" : "name",
                    "valueCode" : "T"
                  },
                  {
                    "url" : "type",
                    "valueUri" : "http://openehr.org/fhir/StructureDefinition/DV-ORDERED"
                  }
                ],
                "url" : "http://hl7.org/fhir/tools/StructureDefinition/type-parameter"
              }
            ],
            "code" : "http://openehr.org/fhir/StructureDefinition/REFERENCE-RANGE"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.magnitude-status",
        "path" : "DV_DURATION.magnitude_status",
        "short" : "Optional status of magnitude with values: \n\n* `\"=\"`   :   magnitude is a point value \n* `\"<\"`   :   value is < magnitude \n* `\">\"`   :   value is > magnitude \n* `\"<=\"` : value is <= magnitude \n* `\">=\"` : value is >= magnitude \n* `\"~\"`   :   value is approximately magnitude \n\nIf not present, assumed meaning is  `\"=\"` .",
        "definition" : "Optional status of magnitude with values: \n\n* `\"=\"`   :   magnitude is a point value \n* `\"<\"`   :   value is < magnitude \n* `\">\"`   :   value is > magnitude \n* `\"<=\"` : value is <= magnitude \n* `\">=\"` : value is >= magnitude \n* `\"~\"`   :   value is approximately magnitude \n\nIf not present, assumed meaning is  `\"=\"` .",
        "min" : 0,
        "max" : "1",
        "base" : {
          "path" : "DV_QUANTIFIED.magnitude_status",
          "min" : 0,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "string"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.accuracy",
        "path" : "DV_DURATION.accuracy",
        "short" : "Accuracy of measurement, expressed either as a half-range percent value (`_accuracy_is_percent_` = `True`) or a half-range quantity.",
        "definition" : "Accuracy of measurement, expressed either as a half-range percent value (`_accuracy_is_percent_` = `True`) or a half-range quantity. A value of `0` means that accuracy is 100%, i.e. no error.\n\nA value of `_unknown_accuracy_value_` means that accuracy was not recorded.",
        "min" : 0,
        "max" : "1",
        "base" : {
          "path" : "DV_QUANTIFIED.accuracy",
          "min" : 0,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "decimal"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.accuracy-is-percent",
        "path" : "DV_DURATION.accuracy_is_percent",
        "short" : "If `True`, indicates that when this object was created, `_accuracy_` was recorded as a percent value; if `False`, as an absolute quantity value.",
        "definition" : "If `True`, indicates that when this object was created, `_accuracy_` was recorded as a percent value; if `False`, as an absolute quantity value.",
        "min" : 0,
        "max" : "1",
        "base" : {
          "path" : "DV_AMOUNT.accuracy_is_percent",
          "min" : 0,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "boolean"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.value",
        "path" : "DV_DURATION.value",
        "short" : "ISO8601 duration string, including described deviations to support negative values and weeks.",
        "definition" : "ISO8601 duration string, including described deviations to support negative values and weeks.",
        "min" : 1,
        "max" : "1",
        "base" : {
          "path" : "DV_DURATION.value",
          "min" : 1,
          "max" : "1"
        },
        "type" : [
          {
            "code" : "string"
          }
        ],
        "isModifier" : false
      }
    ]
  },
  "differential" : {
    "element" : [
      {
        "id" : "DV_DURATION",
        "path" : "DV_DURATION",
        "short" : "Represents a period of time with respect to a notional point in time, which is not specified.",
        "definition" : "Represents a period of time with respect to a notional point in time, which is not specified. A sign may be used to indicate the duration is  backwards  in time rather than forwards. \n\nNOTE: two deviations from ISO 8601 are supported, the first, to allow a negative sign, and the second allowing the 'W' designator to be mixed with other designators. See time types section in the Foundation Types model. \n\nUsed for recording the duration of something in the real world, particularly when there is a need a) to represent the duration in customary format, i.e. days, hours, minutes etc, and b) if it will be used in computational operations with date/time quantities, i.e. additions, subtractions etc. \n\nMisuse: Durations cannot be used to represent points in time, or intervals of time. ",
        "min" : 0,
        "max" : "*",
        "constraint" : [
          {
            "key" : "Value_valid",
            "severity" : "error",
            "human" : "Value valid",
            "expression" : "null # TODO: manual translation needed"
          }
        ],
        "isModifier" : false
      },
      {
        "id" : "DV_DURATION.value",
        "path" : "DV_DURATION.value",
        "short" : "ISO8601 duration string, including described deviations to support negative values and weeks.",
        "definition" : "ISO8601 duration string, including described deviations to support negative values and weeks.",
        "min" : 1,
        "max" : "1",
        "type" : [
          {
            "code" : "string"
          }
        ],
        "isModifier" : false
      }
    ]
  }
}