NPHCDA Immunization FHIR IG
0.9.0 - ci-build Nigeria flag

NPHCDA Immunization FHIR IG, published by https://nphcda.gov.ng. This guide is not an authorized publication; it is the continuous build for version 0.9.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/Nigeria-FHIR-Community/NPHCDA-ImmunizationIG/ and changes regularly. See the Directory of published versions

Extension: NG-Imm Encounter Signature

Official URL: https://nphcda.gov.ng/ig/StructureDefinition/ng-encounter-signature Version: 0.9.0
Draft as of 2026-10-07 Computable Name: NGSignature

A digital or electronic signature capturing who signed, when, type, and signature data. Extension to capture the practitioner's digital signature on an Encounter resource.

Context of Use

    This extension may be used on the following element(s)

Usage info

Usages:

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: doco
Extension 0..* Extension NG-Imm Encounter Signature
Extension.extension 0..0 Extension
Extension.url 1..1 uri "https://nphcda.gov.ng/ig/StructureDefinition/ng-encounter-signature"
Extension.value[x] This element must be supported. 1..1 Signature Value of extension
Extension.value[x].when This element must be supported. 1..1 instant When the signature was created
Extension.value[x].who This element must be supported. 1..1 Reference(Practitioner | PractitionerRole | RelatedPerson | Patient | Device | Organization) Who signed

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: doco
Extension 0..* Extension NG-Imm Encounter Signature
Extension.id 0..1 string Unique id for inter-element referencing
Extension.extension 0..0 Extension
Slice: Unordered, Open by value:url

Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
Extension.url 1..1 uri "https://nphcda.gov.ng/ig/StructureDefinition/ng-encounter-signature"
Extension.value[x] This element must be supported. 1..1 Signature Value of extension
Extension.value[x].id 0..1 string Unique id for inter-element referencing
Extension.value[x].extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
Extension.value[x].type This element is included in summaries. 1..* Coding Indication of the reason the entity signed the object(s)
Binding: SignatureTypeCodes (preferred): An indication of the reason that an entity signed the object.
Extension.value[x].when This element must be supported. This element is included in summaries. 1..1 instant When the signature was created
Extension.value[x].who This element must be supported. This element is included in summaries. 1..1 Reference(Practitioner | PractitionerRole | RelatedPerson | Patient | Device | Organization) Who signed
Extension.value[x].onBehalfOf This element is included in summaries. 0..1 Reference(Practitioner | PractitionerRole | RelatedPerson | Patient | Device | Organization) The party represented
Extension.value[x].targetFormat 0..1 code The technical format of the signed resources
Binding: Mime Types (required): The mime type of an attachment. Any valid mime type is allowed.
Extension.value[x].sigFormat 0..1 code The technical format of the signature
Binding: Mime Types (required): The mime type of an attachment. Any valid mime type is allowed.
Extension.value[x].data 0..1 base64Binary The actual signature content (XML DigSig. JWS, picture, etc.)

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type Signature: A digital or electronic signature capturing who signed, when, type, and signature data. Extension to capture the practitioner's digital signature on an Encounter resource.

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: doco
Extension 0..* Extension NG-Imm Encounter Signature
Extension.extension 0..0 Extension
Extension.url 1..1 uri "https://nphcda.gov.ng/ig/StructureDefinition/ng-encounter-signature"
Extension.value[x] This element must be supported. 1..1 Signature Value of extension
Extension.value[x].when This element must be supported. 1..1 instant When the signature was created
Extension.value[x].who This element must be supported. 1..1 Reference(Practitioner | PractitionerRole | RelatedPerson | Patient | Device | Organization) Who signed

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: doco
Extension 0..* Extension NG-Imm Encounter Signature
Extension.id 0..1 string Unique id for inter-element referencing
Extension.extension 0..0 Extension
Slice: Unordered, Open by value:url

Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
Extension.url 1..1 uri "https://nphcda.gov.ng/ig/StructureDefinition/ng-encounter-signature"
Extension.value[x] This element must be supported. 1..1 Signature Value of extension
Extension.value[x].id 0..1 string Unique id for inter-element referencing
Extension.value[x].extension 0..* Extension Additional content defined by implementations
Slice: Unordered, Open by value:url
Extension.value[x].type This element is included in summaries. 1..* Coding Indication of the reason the entity signed the object(s)
Binding: SignatureTypeCodes (preferred): An indication of the reason that an entity signed the object.
Extension.value[x].when This element must be supported. This element is included in summaries. 1..1 instant When the signature was created
Extension.value[x].who This element must be supported. This element is included in summaries. 1..1 Reference(Practitioner | PractitionerRole | RelatedPerson | Patient | Device | Organization) Who signed
Extension.value[x].onBehalfOf This element is included in summaries. 0..1 Reference(Practitioner | PractitionerRole | RelatedPerson | Patient | Device | Organization) The party represented
Extension.value[x].targetFormat 0..1 code The technical format of the signed resources
Binding: Mime Types (required): The mime type of an attachment. Any valid mime type is allowed.
Extension.value[x].sigFormat 0..1 code The technical format of the signature
Binding: Mime Types (required): The mime type of an attachment. Any valid mime type is allowed.
Extension.value[x].data 0..1 base64Binary The actual signature content (XML DigSig. JWS, picture, etc.)

doco Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type Signature: A digital or electronic signature capturing who signed, when, type, and signature data. Extension to capture the practitioner's digital signature on an Encounter resource.

 

Other representations of profile: CSV, Excel, Schematron

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.value[x].type Base preferred Signature Type Codes 📍4.0.1 FHIR Std.
Extension.value[x].targetFormat Base required MimeType 📍4.0.1 FHIR Std.
Extension.value[x].sigFormat Base required MimeType 📍4.0.1 FHIR Std.

Constraints

Id Grade Path(s) Description Expression
ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()