Clinical Order Workflows
1.0.0-ballot - STU 1 Ballot

Clinical Order Workflows, published by HL7 International / Orders and Observations. This guide is not an authorized publication; it is the continuous build for version 1.0.0-ballot built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-cow-ig/ and changes regularly. See the Directory of published versions

## Resource Profile: COWMessageHeader - JSON Profile

Page standards status: Trial-use | Maturity Level: 1

JSON representation of the cow-message-header resource profile.

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    {
      "resourceType" : "StructureDefinition",
      "id" : "cow-message-header",
      "text" : {
        "status" : "extensions",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: StructureDefinition cow-message-header</b></p><a name=\"cow-message-header\"> </a><a name=\"hccow-message-header\"> </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,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\" 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_resource.png\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Resource\" class=\"hierarchy\"/> <a href=\"StructureDefinition-cow-message-header-definitions.html#MessageHeader\">MessageHeader</a><a name=\"MessageHeader\"> </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/messageheader.html\">MessageHeader</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\">A resource that describes a message that is exchanged between systems</span></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\"/> <a style=\"font-style: italic; font-style: italic\" href=\"StructureDefinition-cow-message-header-definitions.html#MessageHeader.event[x]\">Slices for event[x]</a><a name=\"MessageHeader.event_x_\"> </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\"><span style=\"font-style: italic\"/><span style=\"opacity: 0.5; font-style: italic\">1</span><span style=\"opacity: 0.5; font-style: italic\">..</span><span style=\"opacity: 0.5; font-style: italic\">1</span></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 style=\"opacity: 0.5; font-style: italic; opacity: 0.5; font-style: italic\" href=\"http://hl7.org/fhir/R4/datatypes.html#Coding\">Coding</a><span style=\"opacity: 0.5; font-style: italic\">, </span><a style=\"opacity: 0.5; font-style: italic; opacity: 0.5; font-style: italic\" 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: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5; font-style: italic\">Code for the event this message represents or link to event definition</span><br style=\"font-style: italic\"/><span style=\"font-weight:bold; font-style: italic\">Slice: </span><span style=\"font-style: italic\">Unordered, Open by type:$this</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_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: white; background-color: inherit\" title=\"Slice Item\" class=\"hierarchy\"/> <a href=\"StructureDefinition-cow-message-header-definitions.html#MessageHeader.event[x]:eventCoding\" title=\"Slice eventCoding\">event[x]:eventCoding</a><a name=\"MessageHeader.event_x_.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#Coding\">Coding</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\">Code for the event this message represents or link to event definition</span><br class=\"binding\"/><span style=\"font-weight:bold\" title=\"null\" class=\"binding\">Binding: </span><a href=\"ValueSet-message-header-event.html\" title=\"http://hl7.org/fhir/uv/cow/ValueSet/message-header-event\" class=\"binding\">Clinical Orders Workflow - Message Header Event Codes</a><span title=\"null\" class=\"binding\"> (</span><a href=\"http://hl7.org/fhir/R4/terminologies.html#extensible\" title=\"To be conformant, the concept in this element SHALL be from the specified value set if any of the codes within the value set can apply to the concept being communicated.  If the value set does not cover the concept (based on human review), alternate codings (or, data type allowing, text) may be included instead.\" class=\"binding\">extensible</a><span title=\"null\" class=\"binding\">)</span></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_reference.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Reference to another Resource\" class=\"hierarchy\"/> <a href=\"StructureDefinition-cow-message-header-definitions.html#MessageHeader.focus\">focus</a><a name=\"MessageHeader.focus\"> </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=\"padding-left: 3px; padding-right: 3px; color: white; background-color: red\" title=\"This element must be supported\">S</span></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\">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/R4/references.html\">Reference</a>(<a href=\"StructureDefinition-coordination-task.html\">Coordination Task</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\">The actual content of the message</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,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>"
      },
      "extension" : [
        {
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
          "valueCode" : "oo"
        },
        {
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
          "valueCode" : "trial-use"
        },
        {
          "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
          "valueInteger" : 1,
          "_valueInteger" : {
            "extension" : [
              {
                "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
                "valueCanonical" : "http://hl7.org/fhir/uv/cow/ImplementationGuide/hl7.fhir.uv.cow"
              }
            ]
          }
        }
      ],
      "url" : "http://hl7.org/fhir/uv/cow/StructureDefinition/cow-message-header",
      "version" : "1.0.0-ballot",
      "name" : "COWMessageHeader",
      "title" : "COW Message Header",
      "status" : "active",
      "experimental" : false,
      "date" : "2025-03-03",
      "publisher" : "HL7 International / Orders and Observations",
      "contact" : [
        {
          "name" : "HL7 International / Orders and Observations",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://www.hl7.org/Special/committees/orders"
            },
            {
              "system" : "email",
              "value" : "oo@lists.hl7.org"
            }
          ]
        }
      ],
      "description" : "Minimum expectations for a MessageHeader resource when used for Clinical Order Workflow. This profile is used to describe the use of FHIR Messaging when RESTful-based exchange is not possible between the Placer and the Fulfiller. The purpose of the constraints for the MessageHeader resource is to make sure that the rest of the Clinical Workflow requirements that may be relevant to a particular implementation or national/regional implementation guides are compatible with the RESTful-based exchange patterns.",
      "jurisdiction" : [
        {
          "coding" : [
            {
              "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
              "code" : "001",
              "display" : "World"
            }
          ]
        }
      ],
      "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"
        },
        {
          "identity" : "w5",
          "uri" : "http://hl7.org/fhir/fivews",
          "name" : "FiveWs Pattern Mapping"
        }
      ],
      "kind" : "resource",
      "abstract" : false,
      "type" : "MessageHeader",
      "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/MessageHeader",
      "derivation" : "constraint",
      "snapshot" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
            "valueString" : "4.0.1"
          }
        ],
        "element" : [
          {
            "id" : "MessageHeader",
            "path" : "MessageHeader",
            "short" : "A resource that describes a message that is exchanged between systems",
            "definition" : "The header for a message exchange that is either requesting or responding to an action.  The reference(s) that are the subject of the action as well as other information related to the action are typically transmitted in a bundle in which the MessageHeader resource instance is the first resource in the bundle.",
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "MessageHeader",
              "min" : 0,
              "max" : "*"
            },
            "constraint" : [
              {
                "key" : "dom-2",
                "severity" : "error",
                "human" : "If the resource is contained in another resource, it SHALL NOT contain nested Resources",
                "expression" : "contained.contained.empty()",
                "xpath" : "not(parent::f:contained and f:contained)",
                "source" : "http://hl7.org/fhir/StructureDefinition/DomainResource"
              },
              {
                "key" : "dom-3",
                "severity" : "error",
                "human" : "If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource",
                "expression" : "contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()",
                "xpath" : "not(exists(for $id in f:contained/*/f:id/@value return $contained[not(parent::*/descendant::f:reference/@value=concat('#', $contained/*/id/@value) or descendant::f:reference[@value='#'])]))",
                "source" : "http://hl7.org/fhir/StructureDefinition/DomainResource"
              },
              {
                "key" : "dom-4",
                "severity" : "error",
                "human" : "If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated",
                "expression" : "contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()",
                "xpath" : "not(exists(f:contained/*/f:meta/f:versionId)) and not(exists(f:contained/*/f:meta/f:lastUpdated))",
                "source" : "http://hl7.org/fhir/StructureDefinition/DomainResource"
              },
              {
                "key" : "dom-5",
                "severity" : "error",
                "human" : "If a resource is contained in another resource, it SHALL NOT have a security label",
                "expression" : "contained.meta.security.empty()",
                "xpath" : "not(exists(f:contained/*/f:meta/f:security))",
                "source" : "http://hl7.org/fhir/StructureDefinition/DomainResource"
              },
              {
                "extension" : [
                  {
                    "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice",
                    "valueBoolean" : true
                  },
                  {
                    "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice-explanation",
                    "valueMarkdown" : "When a resource has no narrative, only systems that fully understand the data can display the resource to a human safely. Including a human readable representation in the resource makes for a much more robust eco-system and cheaper handling of resources by intermediary systems. Some ecosystems restrict distribution of resources to only those systems that do fully understand the resources, and as a consequence implementers may believe that the narrative is superfluous. However experience shows that such eco-systems often open up to new participants over time."
                  }
                ],
                "key" : "dom-6",
                "severity" : "warning",
                "human" : "A resource should have narrative for robust management",
                "expression" : "text.`div`.exists()",
                "xpath" : "exists(f:text/h:div)",
                "source" : "http://hl7.org/fhir/StructureDefinition/DomainResource"
              }
            ],
            "isModifier" : false,
            "isSummary" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "Entity. Role, or Act"
              },
              {
                "identity" : "v2",
                "map" : "MSH / MSA / ERR"
              },
              {
                "identity" : "rim",
                "map" : "Message"
              }
            ]
          },
          {
            "id" : "MessageHeader.id",
            "path" : "MessageHeader.id",
            "short" : "Logical id of this artifact",
            "definition" : "The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes.",
            "comment" : "The only time that a resource does not have an id is when it is being submitted to the server using a create operation.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Resource.id",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "extension" : [
                  {
                    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                    "valueUrl" : "id"
                  }
                ],
                "code" : "http://hl7.org/fhirpath/System.String"
              }
            ],
            "isModifier" : false,
            "isSummary" : true
          },
          {
            "id" : "MessageHeader.meta",
            "path" : "MessageHeader.meta",
            "short" : "Metadata about the resource",
            "definition" : "The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Resource.meta",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Meta"
              }
            ],
            "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
          },
          {
            "id" : "MessageHeader.implicitRules",
            "path" : "MessageHeader.implicitRules",
            "short" : "A set of rules under which this content was created",
            "definition" : "A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc.",
            "comment" : "Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Resource.implicitRules",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "uri"
              }
            ],
            "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 element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation",
            "isSummary" : true
          },
          {
            "id" : "MessageHeader.language",
            "path" : "MessageHeader.language",
            "short" : "Language of the resource content",
            "definition" : "The base language in which the resource is written.",
            "comment" : "Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies  to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute).",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "Resource.language",
              "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" : false,
            "binding" : {
              "extension" : [
                {
                  "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet",
                  "valueCanonical" : "http://hl7.org/fhir/ValueSet/all-languages"
                },
                {
                  "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
                  "valueString" : "Language"
                }
              ],
              "strength" : "preferred",
              "description" : "A human language.",
              "valueSet" : "http://hl7.org/fhir/ValueSet/languages|4.0.1"
            }
          },
          {
            "id" : "MessageHeader.text",
            "path" : "MessageHeader.text",
            "short" : "Text summary of the resource, for human interpretation",
            "definition" : "A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it \"clinically safe\" for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety.",
            "comment" : "Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied).  This may be necessary for data from legacy systems where information is captured as a \"text blob\" or where text is additionally entered raw or narrated and encoded information is added later.",
            "alias" : [
              "narrative",
              "html",
              "xhtml",
              "display"
            ],
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "DomainResource.text",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Narrative"
              }
            ],
            "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" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "Act.text?"
              }
            ]
          },
          {
            "id" : "MessageHeader.contained",
            "path" : "MessageHeader.contained",
            "short" : "Contained, inline Resources",
            "definition" : "These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope.",
            "comment" : "This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels.",
            "alias" : [
              "inline resources",
              "anonymous resources",
              "contained resources"
            ],
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "DomainResource.contained",
              "min" : 0,
              "max" : "*"
            },
            "type" : [
              {
                "code" : "Resource"
              }
            ],
            "isModifier" : false,
            "isSummary" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "N/A"
              }
            ]
          },
          {
            "id" : "MessageHeader.extension",
            "path" : "MessageHeader.extension",
            "short" : "Additional content defined by implementations",
            "definition" : "May be used to represent additional information that is not part of the basic definition of the resource. 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" : "DomainResource.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" : "MessageHeader.modifierExtension",
            "path" : "MessageHeader.modifierExtension",
            "short" : "Extensions that cannot be ignored",
            "definition" : "May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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 is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
            "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.",
            "requirements" : "Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension).",
            "alias" : [
              "extensions",
              "user content"
            ],
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "DomainResource.modifierExtension",
              "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" : true,
            "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them",
            "isSummary" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "N/A"
              }
            ]
          },
          {
            "id" : "MessageHeader.event[x]",
            "path" : "MessageHeader.event[x]",
            "slicing" : {
              "discriminator" : [
                {
                  "type" : "type",
                  "path" : "$this"
                }
              ],
              "ordered" : false,
              "rules" : "open"
            },
            "short" : "Code for the event this message represents or link to event definition",
            "definition" : "Code that identifies the event this message represents and connects it with its definition. Events defined as part of the FHIR specification have the system value \"http://terminology.hl7.org/CodeSystem/message-events\".  Alternatively uri to the EventDefinition.",
            "comment" : "The time of the event will be found in the focus resource. The time of the message will be found in [Bundle.timestamp](http://hl7.org/fhir/R4/bundle-definitions.html#Bundle.timestamp).",
            "requirements" : "Drives the behavior associated with this message.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.event[x]",
              "min" : 1,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Coding"
              },
              {
                "code" : "uri"
              }
            ],
            "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,
            "binding" : {
              "extension" : [
                {
                  "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
                  "valueString" : "MessageEvent"
                }
              ],
              "strength" : "example",
              "description" : "One of the message events defined as part of this version of FHIR.",
              "valueSet" : "http://hl7.org/fhir/ValueSet/message-events|4.0.1"
            },
            "mapping" : [
              {
                "identity" : "w5",
                "map" : "FiveWs.what[x]"
              },
              {
                "identity" : "v2",
                "map" : "MSH-9.2"
              },
              {
                "identity" : "rim",
                "map" : "./payload[classCode=\"CACT\" and moodCode=\"EVN\" and isNormalAct()]/code[isNormalDatatype()]/code"
              }
            ]
          },
          {
            "id" : "MessageHeader.event[x]:eventCoding",
            "path" : "MessageHeader.event[x]",
            "sliceName" : "eventCoding",
            "short" : "Code for the event this message represents or link to event definition",
            "definition" : "Code that identifies the event this message represents and connects it with its definition. Events defined as part of the FHIR specification have the system value \"http://terminology.hl7.org/CodeSystem/message-events\".  Alternatively uri to the EventDefinition.",
            "comment" : "The time of the event will be found in the focus resource. The time of the message will be found in [Bundle.timestamp](http://hl7.org/fhir/R4/bundle-definitions.html#Bundle.timestamp).",
            "requirements" : "Drives the behavior associated with this message.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.event[x]",
              "min" : 1,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Coding"
              }
            ],
            "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,
            "binding" : {
              "strength" : "extensible",
              "valueSet" : "http://hl7.org/fhir/uv/cow/ValueSet/message-header-event"
            },
            "mapping" : [
              {
                "identity" : "w5",
                "map" : "FiveWs.what[x]"
              },
              {
                "identity" : "v2",
                "map" : "MSH-9.2"
              },
              {
                "identity" : "rim",
                "map" : "./payload[classCode=\"CACT\" and moodCode=\"EVN\" and isNormalAct()]/code[isNormalDatatype()]/code"
              }
            ]
          },
          {
            "id" : "MessageHeader.destination",
            "path" : "MessageHeader.destination",
            "short" : "Message destination application(s)",
            "definition" : "The destination application which the message is intended for.",
            "comment" : "There SHOULD be at least one destination, but in some circumstances, the source system is unaware of any particular destination system.",
            "requirements" : "Indicates where message is to be sent for routing purposes.  Allows verification of \"am I the intended recipient\".",
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "MessageHeader.destination",
              "min" : 0,
              "max" : "*"
            },
            "type" : [
              {
                "code" : "BackboneElement"
              }
            ],
            "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" : "w5",
                "map" : "FiveWs.subject[x]"
              },
              {
                "identity" : "rim",
                "map" : "./communicationFunction[typeCode=\"RCV\"]"
              },
              {
                "identity" : "w5",
                "map" : "FiveWs.subject"
              }
            ]
          },
          {
            "id" : "MessageHeader.destination.id",
            "path" : "MessageHeader.destination.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" : "MessageHeader.destination.extension",
            "path" : "MessageHeader.destination.extension",
            "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" : "MessageHeader.destination.modifierExtension",
            "path" : "MessageHeader.destination.modifierExtension",
            "short" : "Extensions that cannot be ignored even if unrecognized",
            "definition" : "May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
            "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.",
            "requirements" : "Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension).",
            "alias" : [
              "extensions",
              "user content",
              "modifiers"
            ],
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "BackboneElement.modifierExtension",
              "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" : true,
            "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the element that contains them",
            "isSummary" : true,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "N/A"
              }
            ]
          },
          {
            "id" : "MessageHeader.destination.name",
            "path" : "MessageHeader.destination.name",
            "short" : "Name of system",
            "definition" : "Human-readable name for the target system.",
            "requirements" : "May be used for routing of response and/or to support audit.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.destination.name",
              "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" : "MSH-5"
              },
              {
                "identity" : "rim",
                "map" : "unique(./entity[determinerCode=\"INST\" and (classCode=(\"DEV\", \"PSN\", \"ORG\"]/name[type='ST' and isNormalDatatype()])"
              }
            ]
          },
          {
            "id" : "MessageHeader.destination.target",
            "path" : "MessageHeader.destination.target",
            "short" : "Particular delivery destination within the destination",
            "definition" : "Identifies the target end system in situations where the initial message transmission is to an intermediary system.",
            "requirements" : "Supports multi-hop routing.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.destination.target",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/Device|4.0.1"
                ]
              }
            ],
            "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" : "unique(./entity[determinerCode=\"INST\" and (classCode=(\"DEV\", \"PSN\", \"ORG\"]"
              }
            ]
          },
          {
            "id" : "MessageHeader.destination.endpoint",
            "path" : "MessageHeader.destination.endpoint",
            "short" : "Actual destination address or id",
            "definition" : "Indicates where the message should be routed to.",
            "comment" : "The id may be a non-resolvable URI for systems that do not use standard network-based addresses.",
            "requirements" : "Identifies where to route the message.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.destination.endpoint",
              "min" : 1,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "url"
              }
            ],
            "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" : "MSH-25 (or MSH-6)"
              },
              {
                "identity" : "rim",
                "map" : "./telecom"
              }
            ]
          },
          {
            "id" : "MessageHeader.destination.receiver",
            "path" : "MessageHeader.destination.receiver",
            "short" : "Intended \"real-world\" recipient for the data",
            "definition" : "Allows data conveyed by a message to be addressed to a particular person or department when routing to a specific application isn't sufficient.",
            "requirements" : "Allows routing beyond just the application level.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.destination.receiver",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/Practitioner|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/PractitionerRole|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/Organization|4.0.1"
                ]
              }
            ],
            "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" : "w5",
                "map" : "FiveWs.subject[x]"
              },
              {
                "identity" : "v2",
                "map" : "PRT-5:PRT-4='WAYR' / PRT-8:PRT-4='WAYR'"
              },
              {
                "identity" : "rim",
                "map" : "Not directly supported.  Could be shared using attentionLine.value with an appropriate keyWordText"
              },
              {
                "identity" : "w5",
                "map" : "FiveWs.subject"
              }
            ]
          },
          {
            "id" : "MessageHeader.sender",
            "path" : "MessageHeader.sender",
            "short" : "Real world sender of the message",
            "definition" : "Identifies the sending system to allow the use of a trust relationship.",
            "comment" : "Use case is for where a (trusted) sending system is responsible for multiple organizations, and therefore cannot differentiate based on source endpoint / authentication alone.",
            "requirements" : "Allows routing beyond just the application level.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.sender",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/Practitioner|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/PractitionerRole|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/Organization|4.0.1"
                ]
              }
            ],
            "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" : "w5",
                "map" : "FiveWs.subject[x]"
              },
              {
                "identity" : "v2",
                "map" : "PRT-5:PRT-4='WAYR' / PRT-8:PRT-4='WAYR'"
              },
              {
                "identity" : "rim",
                "map" : "Not directly supported.  Could be shared using attentionLine.value with an appropriate keyWordText"
              },
              {
                "identity" : "w5",
                "map" : "FiveWs.subject"
              }
            ]
          },
          {
            "id" : "MessageHeader.enterer",
            "path" : "MessageHeader.enterer",
            "short" : "The source of the data entry",
            "definition" : "The person or device that performed the data entry leading to this message. When there is more than one candidate, pick the most proximal to the message. Can provide other enterers in extensions.",
            "comment" : "Usually only for the request but can be used in a response.",
            "requirements" : "Need to know for audit/traceback requirements and possibly for authorization.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.enterer",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/Practitioner|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/PractitionerRole|4.0.1"
                ]
              }
            ],
            "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" : "w5",
                "map" : "FiveWs.author"
              },
              {
                "identity" : "v2",
                "map" : "EVN-5 / ORC-10 / PRT-5:PRT-4='EP' / ROL where ROL.3 is EP or ORC.10"
              },
              {
                "identity" : "rim",
                "map" : "unique(./controlAct[classCode=\"CACT\" and classCode=\"EVN\" and isNormalAct()]/participation[typeCode=\"ENT\" and isNormalParticipation]/role[classCode=\"ASSIGNED\" and isNormalRole()]/player[isNormalEntity() and classCode=(\"DEV\", \"PSN\") and determinerCode=\"INST\"])"
              }
            ]
          },
          {
            "id" : "MessageHeader.author",
            "path" : "MessageHeader.author",
            "short" : "The source of the decision",
            "definition" : "The logical author of the message - the person or device that decided the described event should happen. When there is more than one candidate, pick the most proximal to the MessageHeader. Can provide other authors in extensions.",
            "comment" : "Usually only for the request but can be used in a response.",
            "requirements" : "Need to know for audit/traceback requirements and possibly for authorization.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.author",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/Practitioner|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/PractitionerRole|4.0.1"
                ]
              }
            ],
            "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" : "w5",
                "map" : "FiveWs.author"
              },
              {
                "identity" : "v2",
                "map" : "ORC-19 / PRT-5:PRT-4='AUT' / ROL where ROL.3 is IP or ORC.12"
              },
              {
                "identity" : "rim",
                "map" : "unique(./controlAct[classCode=\"CACT\" and classCode=\"EVN\" and isNormalAct()]/participation[isHighest(priorityCode) and typeCode=\"AUT\" and isNormalParticipation]/role[classCode=\"ASSIGNED\" and isNormalRole()]/player[isNormalEntity() and classCode=(\"DEV\", \"PSN\") and determinerCode=\"INST\"])"
              }
            ]
          },
          {
            "id" : "MessageHeader.source",
            "path" : "MessageHeader.source",
            "short" : "Message source application",
            "definition" : "The source application from which this message originated.",
            "requirements" : "Allows replies, supports audit.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.source",
              "min" : 1,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "BackboneElement"
              }
            ],
            "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" : "w5",
                "map" : "FiveWs.actor"
              },
              {
                "identity" : "rim",
                "map" : "unique(./communicationFunction[typeCode=\"SND\"])"
              }
            ]
          },
          {
            "id" : "MessageHeader.source.id",
            "path" : "MessageHeader.source.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" : "MessageHeader.source.extension",
            "path" : "MessageHeader.source.extension",
            "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" : "MessageHeader.source.modifierExtension",
            "path" : "MessageHeader.source.modifierExtension",
            "short" : "Extensions that cannot be ignored even if unrecognized",
            "definition" : "May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
            "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.",
            "requirements" : "Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension).",
            "alias" : [
              "extensions",
              "user content",
              "modifiers"
            ],
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "BackboneElement.modifierExtension",
              "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" : true,
            "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the element that contains them",
            "isSummary" : true,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "N/A"
              }
            ]
          },
          {
            "id" : "MessageHeader.source.name",
            "path" : "MessageHeader.source.name",
            "short" : "Name of system",
            "definition" : "Human-readable name for the source system.",
            "requirements" : "May be used to support audit.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.source.name",
              "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" : "MSH-3"
              },
              {
                "identity" : "rim",
                "map" : "unique(./entity[determinerCode=\"INST\" and classCode=\"DEV\"]/name[type='ST' and isNormalDatatype()])"
              }
            ]
          },
          {
            "id" : "MessageHeader.source.software",
            "path" : "MessageHeader.source.software",
            "short" : "Name of software running the system",
            "definition" : "May include configuration or other information useful in debugging.",
            "requirements" : "Supports audit and possibly interface engine behavior.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.source.software",
              "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" : "SFT-3 ( +SFT-1)"
              },
              {
                "identity" : "rim",
                "map" : "unique(./entity[determinerCode=\"INST\" and classCode=\"DEV\"]/softwareName[isNormalDatatype()])"
              }
            ]
          },
          {
            "id" : "MessageHeader.source.version",
            "path" : "MessageHeader.source.version",
            "short" : "Version of software running",
            "definition" : "Can convey versions of multiple systems in situations where a message passes through multiple hands.",
            "requirements" : "Supports audit and possibly interface engine behavior.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.source.version",
              "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" : "SFT-2"
              },
              {
                "identity" : "rim",
                "map" : "(Not supported)"
              }
            ]
          },
          {
            "id" : "MessageHeader.source.contact",
            "path" : "MessageHeader.source.contact",
            "short" : "Human contact for problems",
            "definition" : "An e-mail, phone, website or other contact point to use to resolve issues with message communications.",
            "requirements" : "Allows escalation of technical issues.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.source.contact",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "ContactPoint"
              }
            ],
            "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" : "(MSH-22?)"
              },
              {
                "identity" : "rim",
                "map" : "unique(./entity[determinerCode=\"INST\" and classCode=\"DEV\"]/scopesRole[normalRole() and classCode=\"CON\" and layer[classCode=\"PSN\"]/telecom[isNormalDatatype()])"
              }
            ]
          },
          {
            "id" : "MessageHeader.source.endpoint",
            "path" : "MessageHeader.source.endpoint",
            "short" : "Actual message source address or id",
            "definition" : "Identifies the routing target to send acknowledgements to.",
            "comment" : "The id may be a non-resolvable URI for systems that do not use standard network-based addresses.",
            "requirements" : "Identifies where to send responses, may influence security permissions.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.source.endpoint",
              "min" : 1,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "url"
              }
            ],
            "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" : "MSH-24"
              },
              {
                "identity" : "rim",
                "map" : "./telecom[isNormalDatatype()]"
              }
            ]
          },
          {
            "id" : "MessageHeader.responsible",
            "path" : "MessageHeader.responsible",
            "short" : "Final responsibility for event",
            "definition" : "The person or organization that accepts overall responsibility for the contents of the message. The implication is that the message event happened under the policies of the responsible party.",
            "comment" : "Usually only for the request but can be used in a response.",
            "requirements" : "Need to know for audit/traceback requirements and possibly for authorization.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.responsible",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/Practitioner|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/PractitionerRole|4.0.1"🔗 ,
                  "http://hl7.org/fhir/StructureDefinition/Organization|4.0.1"
                ]
              }
            ],
            "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" : "w5",
                "map" : "FiveWs.witness"
              },
              {
                "identity" : "v2",
                "map" : "ORC-12 /  PRT-5:PRT-4='OP' /  PRT-8:PRT-4='OP' / ROL where ROL.3 is RO or ORC.11"
              },
              {
                "identity" : "rim",
                "map" : "unique(./controlAct[classCode=\"CACT\" and classCode=\"EVN\" and isNormalAct()]/participation[isHighest(priorityCode) and typeCode=\"RESP\" and isNormalParticipation]/role[classCode=\"ASSIGNED\" and isNormalRole()]/player[isNormalEntity() and classCode=\"PSN\" and determinerCode=\"INST\"] or ./controlAct[classCode=\"CACT\" and classCode=\"EVN\" and isNormalAct()]/participation[isHighest(priorityCode) and typeCode=\"RESP\" and isNormalParticipation]/role[classCode=\"ASSIGNED\" and isNormalRole()]/scoper[isNormalEntity() and classCode=\"ORG\" and determinerCode=\"INST\"])"
              }
            ]
          },
          {
            "id" : "MessageHeader.reason",
            "path" : "MessageHeader.reason",
            "short" : "Cause of event",
            "definition" : "Coded indication of the cause for the event - indicates  a reason for the occurrence of the event that is a focus of this message.",
            "requirements" : "Need to be able to track why resources are being changed and report in the audit log/history of the resource.  May affect authorization.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.reason",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "CodeableConcept"
              }
            ],
            "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,
            "binding" : {
              "extension" : [
                {
                  "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
                  "valueString" : "EventReason"
                }
              ],
              "strength" : "example",
              "description" : "Reason for event occurrence.",
              "valueSet" : "http://hl7.org/fhir/ValueSet/message-reason-encounter|4.0.1"
            },
            "mapping" : [
              {
                "identity" : "w5",
                "map" : "FiveWs.why[x]"
              },
              {
                "identity" : "v2",
                "map" : "EVN.4 / ORC.16 / OBR-31-reason for study / BPO-13-BP indication for use / RXO-20-indication / RXE-27-give indication / RXD-21-indication / RXG-22-indication / RXA-19-indication"
              },
              {
                "identity" : "rim",
                "map" : "unique(./controlAct[classCode=\"CACT\" and classCode=\"EVN\" and isNormalAct()]/reasonCode[isNormalDatatype()])"
              }
            ]
          },
          {
            "id" : "MessageHeader.response",
            "path" : "MessageHeader.response",
            "short" : "If this is a reply to prior message",
            "definition" : "Information about the message that this message is a response to.  Only present if this message is a response.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.response",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "BackboneElement"
              }
            ],
            "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" : "MSA"
              },
              {
                "identity" : "rim",
                "map" : "./conveyedAcknowledgement"
              }
            ]
          },
          {
            "id" : "MessageHeader.response.id",
            "path" : "MessageHeader.response.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" : "MessageHeader.response.extension",
            "path" : "MessageHeader.response.extension",
            "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" : "MessageHeader.response.modifierExtension",
            "path" : "MessageHeader.response.modifierExtension",
            "short" : "Extensions that cannot be ignored even if unrecognized",
            "definition" : "May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. 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. Applications processing a resource are required to check for modifier extensions.\n\nModifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself).",
            "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.",
            "requirements" : "Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension).",
            "alias" : [
              "extensions",
              "user content",
              "modifiers"
            ],
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "BackboneElement.modifierExtension",
              "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" : true,
            "isModifierReason" : "Modifier extensions are expected to modify the meaning or interpretation of the element that contains them",
            "isSummary" : true,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "N/A"
              }
            ]
          },
          {
            "id" : "MessageHeader.response.identifier",
            "path" : "MessageHeader.response.identifier",
            "short" : "Id of original message",
            "definition" : "The MessageHeader.id of the message to which this message is a response.",
            "requirements" : "Allows receiver to know what message is being responded to.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.response.identifier",
              "min" : 1,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "id"
              }
            ],
            "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" : "MSA-2"
              },
              {
                "identity" : "rim",
                "map" : "./acknowledges.id[isNormalDatatype()]"
              }
            ]
          },
          {
            "id" : "MessageHeader.response.code",
            "path" : "MessageHeader.response.code",
            "short" : "ok | transient-error | fatal-error",
            "definition" : "Code that identifies the type of response to the message - whether it was successful or not, and whether it should be resent or not.",
            "comment" : "This is a generic response to the request message. Specific data for the response will be found in MessageHeader.focus.",
            "requirements" : "Allows the sender of the acknowledge message to know if the request was successful or if action is needed.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.response.code",
              "min" : 1,
              "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,
            "binding" : {
              "extension" : [
                {
                  "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName",
                  "valueString" : "ResponseType"
                }
              ],
              "strength" : "required",
              "description" : "The kind of response to a message.",
              "valueSet" : "http://hl7.org/fhir/ValueSet/response-code|4.0.1"
            },
            "mapping" : [
              {
                "identity" : "v2",
                "map" : "MSA-1"
              },
              {
                "identity" : "rim",
                "map" : "./typeCode[isNormalDatatype()]"
              }
            ]
          },
          {
            "id" : "MessageHeader.response.details",
            "path" : "MessageHeader.response.details",
            "short" : "Specific list of hints/warnings/errors",
            "definition" : "Full details of any issues found in the message.",
            "comment" : "This SHALL be contained in the bundle. If any of the issues are errors, the response code SHALL be an error.",
            "requirements" : "Allows the sender of the message to determine what the specific issues are.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.response.details",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/OperationOutcome|4.0.1"
                ]
              }
            ],
            "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" : "v2",
                "map" : "ERR"
              },
              {
                "identity" : "rim",
                "map" : "AcknowledgementDetail or Observation[classCode=\"ALRT\" and moodCode=\"EVN\"]"
              }
            ]
          },
          {
            "id" : "MessageHeader.focus",
            "path" : "MessageHeader.focus",
            "short" : "The actual content of the message",
            "definition" : "The actual data of the message - a reference to the root/focus class of the event.",
            "comment" : "The data is defined where the transaction type is defined. The transaction data is always included in the bundle that is the full message.  Only the root resource is specified.  The resources it references should be contained in the bundle but are not also listed here.  Multiple repetitions are allowed to cater for merges and other situations with multiple focal targets.",
            "requirements" : "Every message event is about actual data, a single resource, that is identified in the definition of the event, and perhaps some or all linked resources.",
            "min" : 1,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.focus",
              "min" : 0,
              "max" : "*"
            },
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/uv/cow/StructureDefinition/coordination-task"
                ]
              }
            ],
            "constraint" : [
              {
                "key" : "ele-1",
                "severity" : "error",
                "human" : "All FHIR elements must have a @value or children",
                "expression" : "hasValue() or (children().count() > id.count())",
                "xpath" : "@value|f:*|h:div",
                "source" : "http://hl7.org/fhir/StructureDefinition/Element"
              }
            ],
            "mustSupport" : true,
            "isModifier" : false,
            "isSummary" : true,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "unique(./controlAct[classCode=\"CACT\" and classCode=\"EVN\" and isNormalAct()]/participation[typeCode=\"SUBJ\" and isNormalParticipation]/role or ./controlAct[classCode=\"CACT\" and classCode=\"EVN\" and isNormalAct()]/outboundRelationship[typeCode=\"SBJ\" and isNormalActRelatoinship]/target)"
              }
            ]
          },
          {
            "id" : "MessageHeader.definition",
            "path" : "MessageHeader.definition",
            "short" : "Link to the definition for this message",
            "definition" : "Permanent link to the MessageDefinition for this message.",
            "requirements" : "Allows sender to define the expected contents of the message.",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "MessageHeader.definition",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "canonical",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/StructureDefinition/MessageDefinition|4.0.1"
                ]
              }
            ],
            "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" : "Not directly supported."
              }
            ]
          }
        ]
      },
      "differential" : {
        "element" : [
          {
            "id" : "MessageHeader",
            "path" : "MessageHeader"
          },
          {
            "id" : "MessageHeader.event[x]",
            "path" : "MessageHeader.event[x]",
            "slicing" : {
              "discriminator" : [
                {
                  "type" : "type",
                  "path" : "$this"
                }
              ],
              "ordered" : false,
              "rules" : "open"
            }
          },
          {
            "id" : "MessageHeader.event[x]:eventCoding",
            "path" : "MessageHeader.event[x]",
            "sliceName" : "eventCoding",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "Coding"
              }
            ],
            "binding" : {
              "strength" : "extensible",
              "valueSet" : "http://hl7.org/fhir/uv/cow/ValueSet/message-header-event"
            }
          },
          {
            "id" : "MessageHeader.focus",
            "path" : "MessageHeader.focus",
            "min" : 1,
            "max" : "1",
            "type" : [
              {
                "code" : "Reference",
                "targetProfile" : [
                  🔗 "http://hl7.org/fhir/uv/cow/StructureDefinition/coordination-task"
                ]
              }
            ],
            "mustSupport" : true
          }
        ]
      }
    }