Extensions for Using Data Elements from FHIR R5 in FHIR R4
0.1.0 - STU
Extensions for Using Data Elements from FHIR R5 in FHIR R4
0.1.0 - STU
Extensions for Using Data Elements from FHIR R5 in FHIR R4 - Downloaded Version null See the Directory of published versions
| Page standards status: Trial-use | Maturity Level: 0 |
JSON representation of the ext-R5-Observation.value extension.
{
"resourceType" : "StructureDefinition",
"id" : "ext-R5-Observation.value",
"text" : {
"status" : "extensions",
"div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: StructureDefinition ext-R5-Observation.value</b></p><a name=\"ext-R5-Observation.value\"> </a><a name=\"hcext-R5-Observation.value\"> </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 & 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_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-ext-R5-Observation.value-definitions.html#Extension\" title=\"R5: `Observation.value[x]` additional types (Attachment, Reference(http://hl7.org/fhir/StructureDefinition/MolecularSequence))\">Extension</a><a name=\"Extension\"> </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/extensibility.html#Extension\">Extension(4.0.1)</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\">R5: value additional types<br/></td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.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_element.gif\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-ext-R5-Observation.value-definitions.html#Extension.url\">url</a><a name=\"Extension.url\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">1..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a style=\"opacity: 0.5; opacity: 0.5\" href=\"http://hl7.org/fhir/R4/datatypes.html#uri\">uri</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"color: darkgreen\">"http://hl7.org/fhir/5.0/StructureDefinition/extension-Observation.value"</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_bck01.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_choice.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Choice of Types\" class=\"hierarchy\"/> <a href=\"StructureDefinition-ext-R5-Observation.value-definitions.html#Extension.value[x]\" title=\"The information determined as a result of making the observation, if the information has a simple value.\">value[x]</a><a name=\"Extension.value_x_\"> </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\"/><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\">Actual result</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_bck010.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_blank.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_datatype.gif\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Data Type\" class=\"hierarchy\"/> <span title=\"Base StructureDefinition for Attachment Type: For referring to data content defined in other formats.\">valueAttachment</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\"/><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\"><a href=\"http://hl7.org/fhir/R4/datatypes.html#Attachment\">Attachment</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\"/></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_bck000.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_blank.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: white; background-color: inherit\" title=\"Reference to another Resource\" class=\"hierarchy\"/> valueReference</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\"/><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/references.html#Reference\">Reference</a>(<a href=\"StructureDefinition-profile-MolecularSequence.html\">Cross-version Profile for R5.MolecularSequence for use in FHIR R4(0.1.0)</a> | <a href=\"http://hl7.org/fhir/R4/molecularsequence.html\">MolecularSequence</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\"/></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,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\" 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" : "fhir"
},
{
"extension" : [
{
"url" : "packageId",
"valueId" : "hl7.fhir.uv.xver-r5.r4"
},
{
"url" : "version",
"valueString" : "0.1.0"
},
{
"url" : "uri",
"valueUri" : "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4"
}
],
"url" : "http://hl7.org/fhir/StructureDefinition/package-source"
},
{
"extension" : [
{
"url" : "startFhirVersion",
"valueCode" : "4.0"
},
{
"url" : "endFhirVersion",
"valueCode" : "4.0"
}
],
"url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
"valueInteger" : 0,
"_valueInteger" : {
"extension" : [
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
"valueCanonical" : "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4"
}
]
}
},
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
"valueCode" : "trial-use",
"_valueCode" : {
"extension" : [
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
"valueCanonical" : "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4"
}
]
}
}
],
"url" : "http://hl7.org/fhir/5.0/StructureDefinition/extension-Observation.value",
"version" : "0.1.0",
"name" : "ExtensionObservation_Value",
"title" : "R5: value additional types",
"status" : "active",
"experimental" : false,
"date" : "2026-03-17T21:02:03.8104715+00:00",
"publisher" : "FHIR Infrastructure",
"contact" : [
{
"name" : "FHIR Infrastructure",
"telecom" : [
{
"system" : "url",
"value" : "http://www.hl7.org/Special/committees/fiwg"
}
]
}
],
"description" : "R5: `Observation.value[x]` additional types (Attachment, Reference(http://hl7.org/fhir/StructureDefinition/MolecularSequence))",
"jurisdiction" : [
{
"coding" : [
{
"system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
"code" : "001",
"display" : "World"
}
]
}
],
"purpose" : "This extension is part of the cross-version definitions generated to enable use of the\r\nelement `Observation.value[x]` as defined in FHIR R5\r\nin FHIR R4.\r\n\r\nThe source element is defined as:\r\n`Observation.value[x]` 0..1 `Attachment, boolean, CodeableConcept, dateTime, integer, Period, Quantity, Range, Ratio, Reference(http://hl7.org/fhir/StructureDefinition/MolecularSequence), SampledData, string, time`\r\n\r\nAcross FHIR versions, the element set has been mapped as:\r\n* R5: `Observation.value[x]` 0..1 `Attachment, boolean, CodeableConcept, dateTime, integer, Period, Quantity, Range, Ratio, Reference(http://hl7.org/fhir/StructureDefinition/MolecularSequence), SampledData, string, time`\n* R4B: `Observation.value[x]` 0..1 `boolean, CodeableConcept, dateTime, integer, Period, Quantity, Range, Ratio, SampledData, string, time`\n* R4: `Observation.value[x]` 0..1 `boolean, CodeableConcept, dateTime, integer, Period, Quantity, Range, Ratio, SampledData, string, time`\r\n\r\nFollowing are the generation technical comments:\r\nElement `Observation.value[x]` is mapped to FHIR R4 element `Observation.value[x]` as `SourceIsBroaderThanTarget`.\nThe mappings for `Observation.value[x]` do not cover the following types: Attachment, Reference.\nThe target context `Observation.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `Observation`.",
"fhirVersion" : "4.0.1",
"mapping" : [
{
"identity" : "rim",
"uri" : "http://hl7.org/v3",
"name" : "RIM Mapping"
}
],
"kind" : "complex-type",
"abstract" : false,
"context" : [
{
"type" : "element",
"expression" : "Observation"
}
],
"type" : "Extension",
"baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension|4.0.1",
"derivation" : "constraint",
"snapshot" : {
"extension" : [
{
"url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
"valueString" : "4.0.1"
}
],
"element" : [
{
"id" : "Extension",
"path" : "Extension",
"short" : "R5: value additional types",
"definition" : "R5: `Observation.value[x]` additional types (Attachment, Reference(http://hl7.org/fhir/StructureDefinition/MolecularSequence))",
"comment" : "Element `Observation.value[x]` is mapped to FHIR R4 element `Observation.value[x]` as `SourceIsBroaderThanTarget`.\nThe mappings for `Observation.value[x]` do not cover the following types: Attachment, Reference.\nThe target context `Observation.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `Observation`.\n- An observation may have:\n 1. a single value here\n 1. both a value and a set of related or component values\n 1. only a set of related or component values.\n- If a value is present, the datatype for this element should be determined by the `code`.\n- *CodeableConcept* with just a text would be used instead of a string if the field was usually coded, or if the type associated with the `code` defines a coded value.\n- *Attachment* is used if the observation result value is a binary file such as an image. If the observation result value is derived from the binary file (for example 'X' detected and here is the the proof in this image), the binary file may be directly represented using *DocumentReference* and referenced by `derivedFrom`.\n- The usage of valueReference is restricted to the MolecularSequence resource when used as a definitional resource, not as a patient-specific finding. .\n- For additional guidance, see the [Notes section](https://hl7.org/fhir/observ.html#notes) below.",
"min" : 0,
"max" : "1",
"base" : {
"path" : "Extension",
"min" : 0,
"max" : "*"
},
"condition" : [
"ele-1"
],
"constraint" : [
{
"key" : "ele-1",
"severity" : "error",
"human" : "All FHIR elements must have a @value or children",
"expression" : "hasValue() or (children().count() > id.count())",
"xpath" : "@value|f:*|h:div",
"source" : "http://hl7.org/fhir/StructureDefinition/Element|4.0.1"
},
{
"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|4.0.1"
}
],
"isModifier" : false
},
{
"id" : "Extension.id",
"path" : "Extension.id",
"representation" : [
"xmlAttr"
],
"short" : "Unique id for inter-element referencing",
"definition" : "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
"min" : 0,
"max" : "1",
"base" : {
"path" : "Element.id",
"min" : 0,
"max" : "1"
},
"type" : [
{
"extension" : [
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
"valueUrl" : "string"
}
],
"code" : "http://hl7.org/fhirpath/System.String"
}
],
"isModifier" : false,
"isSummary" : false,
"mapping" : [
{
"identity" : "rim",
"map" : "n/a"
}
]
},
{
"id" : "Extension.extension",
"path" : "Extension.extension",
"slicing" : {
"discriminator" : [
{
"type" : "value",
"path" : "url"
}
],
"description" : "Extensions are always sliced by (at least) url",
"rules" : "open"
},
"short" : "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|4.0.1"
},
{
"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|4.0.1"
}
],
"isModifier" : false,
"isSummary" : false,
"mapping" : [
{
"identity" : "rim",
"map" : "n/a"
}
]
},
{
"id" : "Extension.url",
"path" : "Extension.url",
"representation" : [
"xmlAttr"
],
"short" : "identifies the meaning of the extension",
"definition" : "Source of the definition for the extension code - a logical name or a URL.",
"comment" : "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
"min" : 1,
"max" : "1",
"base" : {
"path" : "Extension.url",
"min" : 1,
"max" : "1"
},
"type" : [
{
"extension" : [
{
"url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
"valueUrl" : "uri"
}
],
"code" : "http://hl7.org/fhirpath/System.String"
}
],
"fixedUri" : "http://hl7.org/fhir/5.0/StructureDefinition/extension-Observation.value",
"isModifier" : false,
"isSummary" : false,
"mapping" : [
{
"identity" : "rim",
"map" : "N/A"
}
]
},
{
"id" : "Extension.value[x]",
"path" : "Extension.value[x]",
"short" : "Actual result",
"definition" : "The information determined as a result of making the observation, if the information has a simple value.",
"comment" : "- An observation may have:\n 1. a single value here\n 1. both a value and a set of related or component values\n 1. only a set of related or component values.\n- If a value is present, the datatype for this element should be determined by the `code`.\n- *CodeableConcept* with just a text would be used instead of a string if the field was usually coded, or if the type associated with the `code` defines a coded value.\n- *Attachment* is used if the observation result value is a binary file such as an image. If the observation result value is derived from the binary file (for example 'X' detected and here is the the proof in this image), the binary file may be directly represented using *DocumentReference* and referenced by `derivedFrom`.\n- The usage of valueReference is restricted to the MolecularSequence resource when used as a definitional resource, not as a patient-specific finding. .\n- For additional guidance, see the [Notes section](https://hl7.org/fhir/observ.html#notes) below.",
"min" : 0,
"max" : "1",
"base" : {
"path" : "Extension.value[x]",
"min" : 0,
"max" : "1"
},
"type" : [
{
"code" : "Attachment"
},
{
"code" : "Reference",
"targetProfile" : [
🔗 "http://hl7.org/fhir/5.0/StructureDefinition/profile-MolecularSequence|0.1.0"🔗 ,
"http://hl7.org/fhir/StructureDefinition/MolecularSequence|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|4.0.1"
}
],
"isModifier" : false,
"isSummary" : false,
"mapping" : [
{
"identity" : "rim",
"map" : "N/A"
}
]
}
]
},
"differential" : {
"element" : [
{
"id" : "Extension",
"path" : "Extension",
"short" : "R5: value additional types",
"definition" : "R5: `Observation.value[x]` additional types (Attachment, Reference(http://hl7.org/fhir/StructureDefinition/MolecularSequence))",
"comment" : "Element `Observation.value[x]` is mapped to FHIR R4 element `Observation.value[x]` as `SourceIsBroaderThanTarget`.\nThe mappings for `Observation.value[x]` do not cover the following types: Attachment, Reference.\nThe target context `Observation.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `Observation`.\n- An observation may have:\n 1. a single value here\n 1. both a value and a set of related or component values\n 1. only a set of related or component values.\n- If a value is present, the datatype for this element should be determined by the `code`.\n- *CodeableConcept* with just a text would be used instead of a string if the field was usually coded, or if the type associated with the `code` defines a coded value.\n- *Attachment* is used if the observation result value is a binary file such as an image. If the observation result value is derived from the binary file (for example 'X' detected and here is the the proof in this image), the binary file may be directly represented using *DocumentReference* and referenced by `derivedFrom`.\n- The usage of valueReference is restricted to the MolecularSequence resource when used as a definitional resource, not as a patient-specific finding. .\n- For additional guidance, see the [Notes section](https://hl7.org/fhir/observ.html#notes) below.",
"min" : 0,
"max" : "1",
"base" : {
"path" : "Extension",
"min" : 0,
"max" : "*"
},
"isModifier" : false
},
{
"id" : "Extension.url",
"path" : "Extension.url",
"min" : 1,
"max" : "1",
"base" : {
"path" : "Extension.url",
"min" : 1,
"max" : "1"
},
"fixedUri" : "http://hl7.org/fhir/5.0/StructureDefinition/extension-Observation.value"
},
{
"id" : "Extension.value[x]",
"path" : "Extension.value[x]",
"short" : "Actual result",
"definition" : "The information determined as a result of making the observation, if the information has a simple value.",
"comment" : "- An observation may have:\n 1. a single value here\n 1. both a value and a set of related or component values\n 1. only a set of related or component values.\n- If a value is present, the datatype for this element should be determined by the `code`.\n- *CodeableConcept* with just a text would be used instead of a string if the field was usually coded, or if the type associated with the `code` defines a coded value.\n- *Attachment* is used if the observation result value is a binary file such as an image. If the observation result value is derived from the binary file (for example 'X' detected and here is the the proof in this image), the binary file may be directly represented using *DocumentReference* and referenced by `derivedFrom`.\n- The usage of valueReference is restricted to the MolecularSequence resource when used as a definitional resource, not as a patient-specific finding. .\n- For additional guidance, see the [Notes section](https://hl7.org/fhir/observ.html#notes) below.",
"min" : 0,
"max" : "1",
"base" : {
"path" : "Extension.value[x]",
"min" : 0,
"max" : "1"
},
"type" : [
{
"code" : "Attachment"
},
{
"code" : "Reference",
"targetProfile" : [
🔗 "http://hl7.org/fhir/5.0/StructureDefinition/profile-MolecularSequence|0.1.0"🔗 ,
"http://hl7.org/fhir/StructureDefinition/MolecularSequence|4.0.1"
]
}
]
}
]
}
}
IG © 2025+ FHIR Infrastructure. Package hl7.fhir.uv.xver-r5.r4#0.1.0 based on FHIR 4.0.1. Generated 2026-03-20
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