CH EKM (R4)
0.0.1 - ci-build
CH EKM (R4)
0.0.1 - ci-build
CH EKM (R4), published by Federal Office of Public Health FOPH. This guide is not an authorized publication; it is the continuous build for version 0.0.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/ahdis/ch-ekm/ and changes regularly. See the Directory of published versions
| Draft as of 2026-08-05 |
Definitions for the sdc-templateExtractExtension extension.
Guidance on how to interpret the contents of this table can be foundhere
| 0. Extension | |
| Definition | Carrier/placeholder extension used only inside an SDC template-based $extract template to build a whole FHIR Extension via %factory.Extension at a location a value directive cannot reach (e.g. a primitive element's _element.extension). Its %factory.Extension result replaces this carrier during extraction, so it never appears in extracted output. Optional Extension Element - found in all resources. |
| Short | Template-extract carrier that builds a whole Extension via %factory.ExtensionOptional Extensions Element |
| Control | 0..* This element is affected by the following invariants: ele-1 |
| Is Modifier | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists())ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists()) |
| 2. Extension.extension:context | |
| Slice Name | context |
| Definition | If value is of type 'string', then it is to be evaluated as a fhirpath expression. If a value of type 'Expression' is provided, only fhirpath expressions are supported, and the language MAY be omitted. |
| Short | FhirPath expression |
| Control | 0..1 |
| Type | Extension(Extract Template - Context) (Extension Type: Choice of: string, Expression) |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists()) |
| 4. Extension.extension:value | |
| Slice Name | value |
| Definition | Provides FHIRPath expression to evaluate any value(s) to replace in the given template extraction context. If no result is evaluated, the element in the templated resource will be removed, and futher processing of it's children is not required. |
| Short | FhirPath expression |
| Control | 0..1 |
| Type | Extension(Extract Template - Extract value) (Extension Type: string) |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists()) |
| 6. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | 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. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | http://fhir.ch/ig/ch-ekm/StructureDefinition/sdc-templateExtractExtension |
| 8. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 0..01 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |
Guidance on how to interpret the contents of this table can be foundhere
| 0. Extension | |
| Definition | Carrier/placeholder extension used only inside an SDC template-based $extract template to build a whole FHIR Extension via %factory.Extension at a location a value directive cannot reach (e.g. a primitive element's _element.extension). Its %factory.Extension result replaces this carrier during extraction, so it never appears in extracted output. |
| Short | Template-extract carrier that builds a whole Extension via %factory.Extension |
| 2. Extension.extension:context | |
| Slice Name | context |
| Control | 0..1 |
| Type | Extension(Extract Template - Context) (Extension Type: Choice of: string, Expression) |
| 4. Extension.extension:value | |
| Slice Name | value |
| Control | 0..* |
| Type | Extension(Extract Template - Extract value) (Extension Type: string) |
| 6. Extension.url | |
| Fixed Value | http://fhir.ch/ig/ch-ekm/StructureDefinition/sdc-templateExtractExtension |
| 8. Extension.value[x] | |
| Control | 0..0 |
Guidance on how to interpret the contents of this table can be foundhere
| 0. Extension | |
| Definition | Carrier/placeholder extension used only inside an SDC template-based $extract template to build a whole FHIR Extension via %factory.Extension at a location a value directive cannot reach (e.g. a primitive element's _element.extension). Its %factory.Extension result replaces this carrier during extraction, so it never appears in extracted output. |
| Short | Template-extract carrier that builds a whole Extension via %factory.Extension |
| Control | 0..* This element is affected by the following invariants: ele-1 |
| Is Modifier | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists()) |
| 2. Extension.id | |
| Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. |
| Short | Unique id for inter-element referencing |
| Control | 0..1 |
| Type | string |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| 4. Extension.extension | |
| 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. |
| Short | Additional content defined by implementations |
| Comments | 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. |
| Control | 0..* |
| Type | Extension |
| Is Modifier | false |
| Summary | false |
| Alternate Names | extensions, user content |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists()) |
| Slicing | This element introduces a set of slices on Extension.extension. The slices areUnordered and Open, and can be differentiated using the following discriminators: |
| 6. Extension.extension:context | |
| Slice Name | context |
| Definition | If value is of type 'string', then it is to be evaluated as a fhirpath expression. If a value of type 'Expression' is provided, only fhirpath expressions are supported, and the language MAY be omitted. |
| Short | FhirPath expression |
| Control | 0..1 |
| Type | Extension(Extract Template - Context) (Extension Type: Choice of: string, Expression) |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists()) |
| 8. Extension.extension:value | |
| Slice Name | value |
| Definition | Provides FHIRPath expression to evaluate any value(s) to replace in the given template extraction context. If no result is evaluated, the element in the templated resource will be removed, and futher processing of it's children is not required. |
| Short | FhirPath expression |
| Control | 0..1 |
| Type | Extension(Extract Template - Extract value) (Extension Type: string) |
| Is Modifier | false |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))ext-1: Must have either extensions or value[x], not both ( extension.exists() != value.exists()) |
| 10. Extension.url | |
| Definition | Source of the definition for the extension code - a logical name or a URL. |
| Short | identifies the meaning of the extension |
| Comments | 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. |
| Control | 1..1 |
| Type | uri |
| Is Modifier | false |
| XML Format | In the XML format, this property is represented as an attribute. |
| Summary | false |
| Fixed Value | http://fhir.ch/ig/ch-ekm/StructureDefinition/sdc-templateExtractExtension |
| 12. Extension.value[x] | |
| Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list). |
| Short | Value of extension |
| Control | 0..0 |
| Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta |
| Is Modifier | false |
| Primitive Value | This primitive element may be present, or absent, or replaced by an extension |
| Summary | false |
| Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) |