FHIR IG analytics
| Package | hl7.fhir.uv.xver-r5.r4 |
| Resource Type | StructureDefinition |
| Id | StructureDefinition-ext-R5-ImagingSelection.focus.json |
| FHIR Version | R4 |
| Source | http://hl7.org/fhir/uv/xver-r5.r4/0.1.0/StructureDefinition-ext-R5-ImagingSelection.focus.html |
| URL | http://hl7.org/fhir/5.0/StructureDefinition/extension-ImagingSelection.focus |
| Version | 0.1.0 |
| Status | active |
| Date | 2026-03-17T21:02:03.8104715+00:00 |
| Name | ExtensionImagingSelection_Focus |
| Title | R5: Related resource that is the focus for the imaging selection (new) |
| Realm | uv |
| Authority | hl7 |
| Description | R5: `ImagingSelection.focus` (new:Reference(ImagingSelection)) |
| Purpose | This extension is part of the cross-version definitions generated to enable use of the
element `ImagingSelection.focus` as defined in FHIR R5
in FHIR R4.
The source element is defined as:
`ImagingSelection.focus` 0..* `Reference(http://hl7.org/fhir/StructureDefinition/ImagingSelection)`
Across FHIR versions, the element set has been mapped as:
* R5 `ImagingSelection.focus` 0..* `Reference(http://hl7.org/fhir/StructureDefinition/ImagingSelection)`
Following are the generation technical comments:
Element `ImagingSelection.focus` is not mapped to FHIR R4, since FHIR R5 `ImagingSelection` is not mapped.
Element `ImagingSelection.focus` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element). |
| Type | Extension |
| Kind | complex-type |
Resources that use this resource
| StructureDefinition |
| hl7.fhir.uv.xver-r5.r4#0.1.0 | profile-ImagingSelection | Cross-version Profile for R5.ImagingSelection for use in FHIR R4 |
Resources that this resource uses
| StructureDefinition |
| hl7.fhir.uv.xver-r5.r4#0.1.0 | profile-ImagingSelection | Cross-version Profile for R5.ImagingSelection for use in FHIR R4 |
Examples of Use for Extension
No extension usage examples found
Narrative
Note: links and images are rebased to the (stated) source
Source1
{
"resourceType": "StructureDefinition",
"id": "ext-R5-ImagingSelection.focus",
"text": {
"status": "extensions",
"div": "<!-- snip (see above) -->"
},
"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-ImagingSelection.focus",
"version": "0.1.0",
"name": "ExtensionImagingSelection_Focus",
"title": "R5: Related resource that is the focus for the imaging selection (new)",
"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: `ImagingSelection.focus` (new:Reference(ImagingSelection))",
"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 `ImagingSelection.focus` as defined in FHIR R5\r\nin FHIR R4.\r\n\r\nThe source element is defined as:\r\n`ImagingSelection.focus` 0..* `Reference(http://hl7.org/fhir/StructureDefinition/ImagingSelection)`\r\n\r\nAcross FHIR versions, the element set has been mapped as:\r\n* R5 `ImagingSelection.focus` 0..* `Reference(http://hl7.org/fhir/StructureDefinition/ImagingSelection)`\r\n\r\nFollowing are the generation technical comments:\r\nElement `ImagingSelection.focus` is not mapped to FHIR R4, since FHIR R5 `ImagingSelection` is not mapped.\nElement `ImagingSelection.focus` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).",
"fhirVersion": "4.0.1",
"mapping": [
{
"identity": "rim",
"uri": "http://hl7.org/v3",
"name": "RIM Mapping"
}
],
"kind": "complex-type",
"abstract": false,
"context": [
{
"type": "element",
"expression": "Basic"
}
],
"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: Related resource that is the focus for the imaging selection (new)",
"definition": "R5: `ImagingSelection.focus` (new:Reference(ImagingSelection))",
"comment": "Element `ImagingSelection.focus` is not mapped to FHIR R4, since FHIR R5 `ImagingSelection` is not mapped.\nElement `ImagingSelection.focus` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).\nAn imaging selection may reference a DICOM resource that itself references other DICOM resources.\n e.g. a presentation state references a set of source images or frames.",
"min": 0,
"max": "*",
"base": {
"path": "Extension",
"min": 0,
"max": "*"
},
"condition": [
"ele-1"
],
"constraint": [
{
"key": "ele-1",
"severity": "error",
"human": "All FHIR elements must have a @value or children",
"expression": "hasValue() or (children().count() > id.count())",
"xpath": "@value|f:*|h:div",
"source": "http://hl7.org/fhir/StructureDefinition/Element|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-ImagingSelection.focus",
"isModifier": false,
"isSummary": false,
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"id": "Extension.value[x]",
"path": "Extension.value[x]",
"short": "Related resource that is the focus for the imaging selection",
"definition": "The actual focus of an observation when it is not the patient of record representing something or someone associated with the patient such as a spouse, parent, fetus, or donor. For example, fetus observations in a mother's record. The focus of an observation could also be an existing condition, an intervention, the subject's diet, another observation of the subject, or a body structure such as tumor or implanted device. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is the focus.",
"comment": "An imaging selection may reference a DICOM resource that itself references other DICOM resources.\n e.g. a presentation state references a set of source images or frames.",
"min": 0,
"max": "1",
"base": {
"path": "Extension.value[x]",
"min": 0,
"max": "1"
},
"type": [
{
"code": "Reference",
"targetProfile": [
"http://hl7.org/fhir/5.0/StructureDefinition/profile-ImagingSelection|0.1.0",
"http://hl7.org/fhir/StructureDefinition/Basic|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: Related resource that is the focus for the imaging selection (new)",
"definition": "R5: `ImagingSelection.focus` (new:Reference(ImagingSelection))",
"comment": "Element `ImagingSelection.focus` is not mapped to FHIR R4, since FHIR R5 `ImagingSelection` is not mapped.\nElement `ImagingSelection.focus` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).\nAn imaging selection may reference a DICOM resource that itself references other DICOM resources.\n e.g. a presentation state references a set of source images or frames.",
"min": 0,
"max": "*",
"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-ImagingSelection.focus"
},
{
"id": "Extension.value[x]",
"path": "Extension.value[x]",
"short": "Related resource that is the focus for the imaging selection",
"definition": "The actual focus of an observation when it is not the patient of record representing something or someone associated with the patient such as a spouse, parent, fetus, or donor. For example, fetus observations in a mother's record. The focus of an observation could also be an existing condition, an intervention, the subject's diet, another observation of the subject, or a body structure such as tumor or implanted device. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is the focus.",
"comment": "An imaging selection may reference a DICOM resource that itself references other DICOM resources.\n e.g. a presentation state references a set of source images or frames.",
"min": 0,
"max": "1",
"base": {
"path": "Extension.value[x]",
"min": 0,
"max": "1"
},
"type": [
{
"code": "Reference",
"targetProfile": [
"http://hl7.org/fhir/5.0/StructureDefinition/profile-ImagingSelection|0.1.0",
"http://hl7.org/fhir/StructureDefinition/Basic|4.0.1"
]
}
]
}
]
}
}
Extension 
value[x] 
FHIR
FHIRsmith