WHO SMART Trust
1.7.0 - release

WHO SMART Trust, published by WHO. This guide is not an authorized publication; it is the continuous build for version 1.7.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/WorldHealthOrganization/smart-trust/tree/v1.7.0-releaseCandidate and changes regularly. See the Directory of published versions

## Logical Model: HCert - Detailed Descriptions

Active as of 2026-07-29

Definitions for the HCert logical model.

- Key Elements Table
- Differential Elements Table
- Snapshot Elements Table

Guidance on how to interpret the contents of this table can be foundhere

0. HCert
Definition | Logical Model for the HCERT Base definition for all types defined in FHIR type system.
Short | Health CertificateBase for all types and resources
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. HCert.1
Definition | HCERT EU DCC
Short | HCERT EU DCC
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/HCertDCC
4. HCert.3
Definition | DDCC Vaccination claim (PROPOSED)
Short | Vaccination Core Data Set claim
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet(DDCC Core Data Set Logical Model for Vaccination Status)
6. HCert.4
Definition | DDCC Test Result claim (PROPOSED)
Short | Test Result Core Data Set claim
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet(DDCC Core Data Set Logical Model for Test Result)
8. HCert.5
Definition | URI of a Verifiable Health Link. Of the form 'vhlink:/eyJ1cmwiOiJodHRwczovL2Vo....'
Short | VHL
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
10. HCert.-6
Definition | Minimal Digital Vaccination Certificate Payload (Proposed)
Short | DVCMin
Control | 0..1
Type | http://smart.who.int/trust-phw/StructureDefinition/DVCMin
12. HCert.-7
Definition | Medication Treatment Line Minimal (Proposed)
Short | Medication Treatment Line Minimal (Proposed)
Control | 0..1
Type | http://smart.who.int/ph4h/StructureDefinition/MedicationTreatmentLineMin

Guidance on how to interpret the contents of this table can be foundhere

0. HCert
Definition | Logical Model for the HCERT
Short | Health Certificate
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. HCert.1
Definition | HCERT EU DCC
Short | HCERT EU DCC
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/HCertDCC
4. HCert.3
Definition | DDCC Vaccination claim (PROPOSED)
Short | Vaccination Core Data Set claim
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet(DDCC Core Data Set Logical Model for Vaccination Status)
6. HCert.4
Definition | DDCC Test Result claim (PROPOSED)
Short | Test Result Core Data Set claim
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet(DDCC Core Data Set Logical Model for Test Result)
8. HCert.5
Definition | URI of a Verifiable Health Link. Of the form 'vhlink:/eyJ1cmwiOiJodHRwczovL2Vo....'
Short | VHL
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
10. HCert.-6
Definition | Minimal Digital Vaccination Certificate Payload (Proposed)
Short | DVCMin
Control | 0..1
Type | http://smart.who.int/trust-phw/StructureDefinition/DVCMin
12. HCert.-7
Definition | Medication Treatment Line Minimal (Proposed)
Short | Medication Treatment Line Minimal (Proposed)
Control | 0..1
Type | http://smart.who.int/ph4h/StructureDefinition/MedicationTreatmentLineMin

Guidance on how to interpret the contents of this table can be foundhere

0. HCert
Definition | Logical Model for the HCERT
Short | Health Certificate
Control | 0..*
Is Modifier | false
Logical Model | Instances of this logical model are not marked to be the target of a Reference
2. HCert.1
Definition | HCERT EU DCC
Short | HCERT EU DCC
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/HCertDCC
4. HCert.3
Definition | DDCC Vaccination claim (PROPOSED)
Short | Vaccination Core Data Set claim
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet(DDCC Core Data Set Logical Model for Vaccination Status)
6. HCert.4
Definition | DDCC Test Result claim (PROPOSED)
Short | Test Result Core Data Set claim
Control | 0..1
Type | http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet(DDCC Core Data Set Logical Model for Test Result)
8. HCert.5
Definition | URI of a Verifiable Health Link. Of the form 'vhlink:/eyJ1cmwiOiJodHRwczovL2Vo....'
Short | VHL
Control | 0..1
Type | string
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
10. HCert.-6
Definition | Minimal Digital Vaccination Certificate Payload (Proposed)
Short | DVCMin
Control | 0..1
Type | http://smart.who.int/trust-phw/StructureDefinition/DVCMin
12. HCert.-7
Definition | Medication Treatment Line Minimal (Proposed)
Short | Medication Treatment Line Minimal (Proposed)
Control | 0..1
Type | http://smart.who.int/ph4h/StructureDefinition/MedicationTreatmentLineMin