FHIR IG analytics
| Package | org.savannahghi.healthyroute |
| Resource Type | StructureDefinition |
| Id | StructureDefinition-hr-reading-position.json |
| FHIR Version | R5 |
| Source | https://build.fhir.org/ig/savannahghi/healthy-route-ig/StructureDefinition-hr-reading-position.html |
| URL | https://fhir.savannahghi.org/ig/healthy-route/StructureDefinition/hr-reading-position |
| Version | 0.1.0 |
| Status | draft |
| Date | 2026-10-11T11:12:01+00:00 |
| Name | HRReadingPosition |
| Title | Reading Position |
| Description | Whether the reading was taken before or after retinal capture. |
| Purpose | One country allows the second reading either side of the retinal capture. The timing rule that checks the sequence needs to know which side was chosen. |
| Type | Extension |
| Kind | complex-type |
Resources that use this resource
| StructureDefinition |
| org.savannahghi.healthyroute#current | hr-blood-pressure | Healthy Route Blood Pressure |
Resources that this resource uses
| ValueSet |
| org.savannahghi.healthyroute#current | hr-bp-position-vs | Blood Pressure Reading Position Value Set |
Examples of Use for Extension
Narrative
Note: links and images are rebased to the (stated) source
Source1
{
"resourceType": "StructureDefinition",
"id": "hr-reading-position",
"text": {
"status": "extensions",
"div": "<!-- snip (see above) -->"
},
"extension": [
{
"url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics",
"valueCode": "can-bind"
}
],
"url": "https://fhir.savannahghi.org/ig/healthy-route/StructureDefinition/hr-reading-position",
"version": "0.1.0",
"name": "HRReadingPosition",
"title": "Reading Position",
"status": "draft",
"experimental": false,
"date": "2026-10-11T11:12:01+00:00",
"publisher": "Savannah Informatics",
"contact": [
{
"name": "Savannah Informatics",
"telecom": [
{
"system": "url",
"value": "https://savannahghi.org"
}
]
},
{
"name": "Savannah Informatics",
"telecom": [
{
"system": "url",
"value": "https://savannahghi.org"
}
]
}
],
"description": "Whether the reading was taken before or after retinal capture.",
"purpose": "One country allows the second reading either side of the retinal capture. The timing rule that checks the sequence needs to know which side was chosen.",
"fhirVersion": "5.0.0",
"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",
"derivation": "constraint",
"snapshot": {
"extension": [
{
"url": "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
"valueString": "5.0.0"
}
],
"element": [
{
"id": "Extension",
"path": "Extension",
"short": "Reading Position",
"definition": "Whether the reading was taken before or after retinal capture.",
"min": 0,
"max": "*",
"base": {
"path": "Extension",
"min": 0,
"max": "*"
},
"constraint": [
{
"key": "ele-1",
"severity": "error",
"human": "All FHIR elements must have a @value or children",
"expression": "hasValue() or (children().count() > id.count())",
"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()",
"source": "http://hl7.org/fhir/StructureDefinition/Extension"
}
],
"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": "id"
}
],
"code": "http://hl7.org/fhirpath/System.String"
}
],
"condition": [
"ele-1"
],
"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": "Extension",
"definition": "An Extension",
"min": 0,
"max": "0",
"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())",
"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()",
"source": "http://hl7.org/fhir/StructureDefinition/Extension"
}
],
"isModifier": false,
"isSummary": false
},
{
"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": "https://fhir.savannahghi.org/ig/healthy-route/StructureDefinition/hr-reading-position",
"isModifier": false,
"isSummary": false,
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
},
{
"id": "Extension.value[x]",
"path": "Extension.value[x]",
"short": "Value of extension",
"definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R5/extensibility.html) for a list).",
"min": 1,
"max": "1",
"base": {
"path": "Extension.value[x]",
"min": 0,
"max": "1"
},
"type": [
{
"code": "CodeableConcept"
}
],
"condition": [
"ext-1"
],
"constraint": [
{
"key": "ele-1",
"severity": "error",
"human": "All FHIR elements must have a @value or children",
"expression": "hasValue() or (children().count() > id.count())",
"source": "http://hl7.org/fhir/StructureDefinition/Element"
}
],
"mustSupport": true,
"isModifier": false,
"isSummary": false,
"binding": {
"strength": "required",
"valueSet": "https://fhir.savannahghi.org/ig/healthy-route/ValueSet/hr-bp-position-vs"
},
"mapping": [
{
"identity": "rim",
"map": "N/A"
}
]
}
]
},
"differential": {
"element": [
{
"id": "Extension",
"path": "Extension",
"short": "Reading Position",
"definition": "Whether the reading was taken before or after retinal capture."
},
{
"id": "Extension.extension",
"path": "Extension.extension",
"max": "0"
},
{
"id": "Extension.url",
"path": "Extension.url",
"fixedUri": "https://fhir.savannahghi.org/ig/healthy-route/StructureDefinition/hr-reading-position"
},
{
"id": "Extension.value[x]",
"path": "Extension.value[x]",
"min": 1,
"type": [
{
"code": "CodeableConcept"
}
],
"mustSupport": true,
"binding": {
"strength": "required",
"valueSet": "https://fhir.savannahghi.org/ig/healthy-route/ValueSet/hr-bp-position-vs"
}
}
]
}
}
Extension 
extension 
value[x] 
FHIR
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