Kenya ePrescription FHIR Implementation Guide
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Extension: Prescription Digital Signature

Official URL: https://nshr-uat.sha.go.ke/StructureDefinition/prescription-digital-signature Version: 0.1.0
Active as of 2026-04-24 Computable Name: PrescriptionDigitalSignatureExtension

Copyright/Legal: Copyright 2025+ Digital Health Agency, Kenya. This content is licensed under Creative Commons Attribution 4.0 International (CC-BY-4.0). Terminology content from the Kenya Pharmacy and Poisons Board (PPB) via Open Concept Lab (OCL) is subject to separate terms.

A reference to a digital signature or electronic authorization applied to a prescription by the prescribing practitioner, as required under Kenya e-Health regulations.

Context of Use

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

Usage info

Usages:

  • This Extension is not used by any profiles in this Implementation Guide

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: Filtersdoco
.. Extension 0..* Extension Prescription Digital Signature
... extension 4..* Extension Extension
... Slices for extension Content/Rules for all slices
.... extension:signatureType 1..1 Extension Type of digital signature (e.g. author, co-author)
..... extension 0..0 Extension
..... url 1..1 uri "signatureType"
..... value[x] 0..1 Coding Value of extension
Binding: SignatureTypeCodes (extensible)
.... extension:signatureValue 1..1 Extension Base64-encoded digital signature blob
..... extension 0..0 Extension
..... url 1..1 uri "signatureValue"
..... value[x] 0..1 base64Binary Value of extension
.... extension:signedBy 1..1 Extension Practitioner who applied the signature
..... extension 0..0 Extension
..... url 1..1 uri "signedBy"
..... value[x] 0..1 Reference(Practitioner) Value of extension
.... extension:signedOn 1..1 Extension Date and time the signature was applied
..... extension 0..0 Extension
..... url 1..1 uri "signedOn"
..... value[x] 0..1 instant Value of extension
... url 1..1 uri "https://nshr-uat.sha.go.ke/StructureDefinition/prescription-digital-signature"

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Prescription Digital Signature
... id 0..1 string Unique id for inter-element referencing
... Slices for extension 4..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:signatureType 1..1 Extension Type of digital signature (e.g. author, co-author)
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signatureType"
..... value[x] 0..1 Coding Value of extension
Binding: SignatureTypeCodes (extensible)
.... extension:signatureValue 1..1 Extension Base64-encoded digital signature blob
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signatureValue"
..... value[x] 0..1 base64Binary Value of extension
.... extension:signedBy 1..1 Extension Practitioner who applied the signature
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signedBy"
..... value[x] 0..1 Reference(Practitioner) Value of extension
.... extension:signedOn 1..1 Extension Date and time the signature was applied
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signedOn"
..... value[x] 0..1 instant Value of extension
... url 1..1 uri "https://nshr-uat.sha.go.ke/StructureDefinition/prescription-digital-signature"

doco Documentation for this format

This structure is derived from Extension

Summary

Complex Extension: A reference to a digital signature or electronic authorization applied to a prescription by the prescribing practitioner, as required under Kenya e-Health regulations.

  • signatureType: Coding: An Extension
  • signatureValue: base64Binary: An Extension
  • signedBy: Reference: An Extension
  • signedOn: instant: An Extension

Differential View

This structure is derived from Extension

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Prescription Digital Signature
... extension 4..* Extension Extension
... Slices for extension Content/Rules for all slices
.... extension:signatureType 1..1 Extension Type of digital signature (e.g. author, co-author)
..... extension 0..0 Extension
..... url 1..1 uri "signatureType"
..... value[x] 0..1 Coding Value of extension
Binding: SignatureTypeCodes (extensible)
.... extension:signatureValue 1..1 Extension Base64-encoded digital signature blob
..... extension 0..0 Extension
..... url 1..1 uri "signatureValue"
..... value[x] 0..1 base64Binary Value of extension
.... extension:signedBy 1..1 Extension Practitioner who applied the signature
..... extension 0..0 Extension
..... url 1..1 uri "signedBy"
..... value[x] 0..1 Reference(Practitioner) Value of extension
.... extension:signedOn 1..1 Extension Date and time the signature was applied
..... extension 0..0 Extension
..... url 1..1 uri "signedOn"
..... value[x] 0..1 instant Value of extension
... url 1..1 uri "https://nshr-uat.sha.go.ke/StructureDefinition/prescription-digital-signature"

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Prescription Digital Signature
... id 0..1 string Unique id for inter-element referencing
... Slices for extension 4..* Extension Extension
Slice: Unordered, Open by value:url
.... extension:signatureType 1..1 Extension Type of digital signature (e.g. author, co-author)
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signatureType"
..... value[x] 0..1 Coding Value of extension
Binding: SignatureTypeCodes (extensible)
.... extension:signatureValue 1..1 Extension Base64-encoded digital signature blob
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signatureValue"
..... value[x] 0..1 base64Binary Value of extension
.... extension:signedBy 1..1 Extension Practitioner who applied the signature
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signedBy"
..... value[x] 0..1 Reference(Practitioner) Value of extension
.... extension:signedOn 1..1 Extension Date and time the signature was applied
..... id 0..1 string Unique id for inter-element referencing
..... extension 0..0 Extension
Slice: Unordered, Open by value:url
..... url 1..1 uri "signedOn"
..... value[x] 0..1 instant Value of extension
... url 1..1 uri "https://nshr-uat.sha.go.ke/StructureDefinition/prescription-digital-signature"

doco Documentation for this format

This structure is derived from Extension

Summary

Complex Extension: A reference to a digital signature or electronic authorization applied to a prescription by the prescribing practitioner, as required under Kenya e-Health regulations.

  • signatureType: Coding: An Extension
  • signatureValue: base64Binary: An Extension
  • signedBy: Reference: An Extension
  • signedOn: instant: An Extension

 

Other representations of profile: CSV, Excel, Schematron

Terminology Bindings

Path Status Usage ValueSet Version Source
Extension.extension:signatureType.​value[x] Base extensible Signature Type Codes 📦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()