Salient Field Extension¶
| Canonical | ../StructureDefinition/salient-field |
|---|---|
| Status | draft · 1.26.0 |
| Base | Extension (constraint) |
| Context | StructureDefinition (element) |
| Source | FSH · JSON |
One salient synthesized accessor on a profile: a named, typed FHIRPath value expression over the resource. Drives the reader/render surface (the AI chart) and the facade's salient accessors, distinct from the validation-scoped element set.
Elements / Key elements
The working view: must-support, required, modifier and sliced elements from the effective (snapshot) definition.
| Element | Flags | Card. | Type | Description & Constraints |
|---|---|---|---|---|
| Extension | 0..* | Salient Field Invariants: ele-1, ext-1 |
||
| extension | 2..* | Extension | Additional content defined by implementations i Slicing: value:url (open) Invariants: ele-1, ext-1 |
|
| extension:key | S | 1..1 | Extension | The accessor name (snake_cased in the facade) i Invariants: ele-1, ext-1 |
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: key |
|
| extension:expression | S | 1..1 | Extension | A restricted FHIRPath VALUE expression over the resource (raw FHIR) i Invariants: ele-1, ext-1 |
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: expression |
|
| extension:type | 0..1 | Extension | The scalar return type (FieldKind: string | code | dateTime | integer | boolean) i Invariants: ele-1, ext-1 |
|
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: type |
|
| extension:chartName | 0..1 | Extension | The rendered attribute name (defaults to key) i Invariants: ele-1, ext-1 |
|
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: chartName |
|
| extension:short | 0..1 | Extension | One-line summary, as ElementDefinition.short. Inherited from the referenced element when absent i Invariants: ele-1, ext-1 |
|
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: short |
|
| extension:definition | 0..1 | Extension | Full definition, as ElementDefinition.definition. Carried into the generated docstring and the pydantic schema, so this is the text an LLM reads i Invariants: ele-1, ext-1 |
|
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: definition |
|
| extension:comment | 0..1 | Extension | Usage notes, as ElementDefinition.comment. Where to say what a derived expression does that its leaf element does not i Invariants: ele-1, ext-1 |
|
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: comment |
|
| url | 1..1 | http://hl7.org/fhirpath/System.String | identifies the meaning of the extension i Fixed: ../StructureDefinition/salient-field |