FHIR IG analytics| Package | hl7.fhir.uv.xver-r4.r3 |
| Resource Type | StructureDefinition |
| Id | StructureDefinition-ext-R4-Reference.type.json |
| FHIR Version | R3 |
| Source | http://hl7.org/fhir/uv/xver-r4.r3/0.1.0/StructureDefinition-ext-R4-Reference.type.html |
| URL | http://hl7.org/fhir/4.0/StructureDefinition/extension-Reference.type |
| Version | 0.1.0 |
| Status | active |
| Date | 2026-03-17T21:02:03.8104715+00:00 |
| Name | ExtensionReference_Type |
| Title | R4: Type the reference refers to (e.g. "Patient") (new) |
| Realm | uv |
| Authority | hl7 |
| Description | R4: `Reference.type` (new:uri) |
| Purpose | This extension is part of the cross-version definitions generated to enable use of the element `Reference.type` as defined in FHIR R4 in FHIR STU3. The source element is defined as: `Reference.type` 0..1 `uri` Following are the generation technical comments: Element `Reference.type` has a context of Reference based on following the parent source element upwards and mapping to `Reference`. Element `Reference.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element). |
| Type | Extension |
| Kind | complex-type |
No resources found
| ValueSet | ||
| hl7.fhir.uv.xver-r4.r3#0.1.0 | R4-resource-types-for-R3 | Cross-version ValueSet R4.ResourceType for use in FHIR STU3 |
No extension usage examples found
Note: links and images are rebased to the (stated) source
Generated Narrative: StructureDefinition ext-R4-Reference.type
| Name | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
  Extension | 0..1 | Extension | R4: Type the reference refers to (e.g. "Patient") (new) | |
 url | 1..1 | uri | "http://hl7.org/fhir/4.0/StructureDefinition/extension-Reference.type" | |
  value[x] | 0..1 | uri | Type the reference refers to (e.g. "Patient") Binding: R4ResourceTypesForR3 (0.1.0) (extensible): Aa resource (or, for logical models, the URI of the logical model). | |
| Documentation for this format | ||||
FHIR
FHIRsmith{
"resourceType": "StructureDefinition",
"id": "ext-R4-Reference.type",
"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-r4.r3"
},
{
"url": "version",
"valueString": "0.1.0"
},
{
"url": "uri",
"valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r3"
}
],
"url": "http://hl7.org/fhir/StructureDefinition/package-source"
},
{
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
"valueInteger": 0,
"_valueInteger": {
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
"valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r3"
}
]
}
},
{
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
"valueCode": "trial-use",
"_valueCode": {
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
"valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.r3"
}
]
}
}
],
"url": "http://hl7.org/fhir/4.0/StructureDefinition/extension-Reference.type",
"version": "0.1.0",
"name": "ExtensionReference_Type",
"title": "R4: Type the reference refers to (e.g. \"Patient\") (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": "R4: `Reference.type` (new:uri)",
"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 `Reference.type` as defined in FHIR R4\r\nin FHIR STU3.\r\n\r\nThe source element is defined as:\r\n`Reference.type` 0..1 `uri`\r\n\r\nFollowing are the generation technical comments:\r\nElement `Reference.type` has a context of Reference based on following the parent source element upwards and mapping to `Reference`.\nElement `Reference.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).",
"fhirVersion": "3.0.2",
"mapping": [
{
"identity": "rim",
"uri": "http://hl7.org/v3",
"name": "RIM Mapping"
}
],
"kind": "complex-type",
"abstract": false,
"contextType": "datatype",
"context": [
"Reference"
],
"type": "Extension",
"baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension",
"derivation": "constraint",
"snapshot": {
"element": [
{
"id": "Extension",
"path": "Extension",
"short": "R4: Type the reference refers to (e.g. \"Patient\") (new)",
"definition": "R4: `Reference.type` (new:uri)",
"comment": "Element `Reference.type` has a context of Reference based on following the parent source element upwards and mapping to `Reference`.\nElement `Reference.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).\nThis element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.",
"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() | (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
},
{
"id": "Extension.id",
"path": "Extension.id",
"representation": [
"xmlAttr"
],
"short": "xml:id (or equivalent in JSON)",
"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": [
{
"code": "string"
}
],
"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. In order 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.",
"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"
}
],
"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": [
{
"code": "uri"
}
],
"fixedUri": "http://hl7.org/fhir/4.0/StructureDefinition/extension-Reference.type",
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"id": "Extension.value[x]",
"path": "Extension.value[x]",
"short": "Type the reference refers to (e.g. \"Patient\")",
"definition": "The expected type of the target of the reference. If both Reference.type and Reference.reference are populated and Reference.reference is a FHIR URL, both SHALL be consistent.\n\nThe type is the Canonical URL of Resource Definition that is the type this reference refers to. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition/ e.g. \"Patient\" is a reference to http://hl7.org/fhir/StructureDefinition/Patient. Absolute URLs are only allowed for logical models (and can only be used in references in logical models, not resources).",
"comment": "This element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.",
"min": 0,
"max": "1",
"base": {
"path": "Extension.value[x]",
"min": 0,
"max": "1"
},
"type": [
{
"code": "uri"
}
],
"binding": {
"strength": "extensible",
"description": "Aa resource (or, for logical models, the URI of the logical model).",
"valueSetUri": "http://hl7.org/fhir/uv/xver/ValueSet/R4-resource-types-for-R3|0.1.0"
},
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
}
]
},
"differential": {
"element": [
{
"id": "Extension",
"path": "Extension",
"short": "R4: Type the reference refers to (e.g. \"Patient\") (new)",
"definition": "R4: `Reference.type` (new:uri)",
"comment": "Element `Reference.type` has a context of Reference based on following the parent source element upwards and mapping to `Reference`.\nElement `Reference.type` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).\nThis element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.",
"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/4.0/StructureDefinition/extension-Reference.type"
},
{
"id": "Extension.value[x]",
"path": "Extension.value[x]",
"short": "Type the reference refers to (e.g. \"Patient\")",
"definition": "The expected type of the target of the reference. If both Reference.type and Reference.reference are populated and Reference.reference is a FHIR URL, both SHALL be consistent.\n\nThe type is the Canonical URL of Resource Definition that is the type this reference refers to. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition/ e.g. \"Patient\" is a reference to http://hl7.org/fhir/StructureDefinition/Patient. Absolute URLs are only allowed for logical models (and can only be used in references in logical models, not resources).",
"comment": "This element is used to indicate the type of the target of the reference. This may be used which ever of the other elements are populated (or not). In some cases, the type of the target may be determined by inspection of the reference (e.g. a RESTful URL) or by resolving the target of the reference; if both the type and a reference is provided, the reference SHALL resolve to a resource of the same type as that specified.",
"min": 0,
"max": "1",
"base": {
"path": "Extension.value[x]",
"min": 0,
"max": "1"
},
"type": [
{
"code": "uri"
}
],
"binding": {
"strength": "extensible",
"description": "Aa resource (or, for logical models, the URI of the logical model).",
"valueSetUri": "http://hl7.org/fhir/uv/xver/ValueSet/R4-resource-types-for-R3|0.1.0"
}
}
]
}
}