WHO SMART Trust
1.6.0 - active

WHO SMART Trust, published by WHO. This guide is not an authorized publication; it is the continuous build for version 1.6.0 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/v1.6.0-releasecandidate and changes regularly. See the Directory of published versions

## Logical Model: Health Certificate

Official URL: http://smart.who.int/trust/StructureDefinition/HCert | Version: 1.6.0
Active as of 2026-07-01 | Computable Name: HCert

Logical Model for the HCERT

Usages:

- Use this Logical Model: CBOR Web Token (CWT) Payload (Common)

You can also check for usages in the FHIR IG Statistics

### Formal Views of Profile Content

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

- Key Elements Table
- Differential Table
- Snapshot Table
- Statistics/References
- All

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
HCert |  | 0..* | Base | Health Certificate
1 |  | 0..1 | HCertDCC | HCERT EU DCC
3 |  | 0..1 | DDCCCoreDataSetVS | Vaccination Core Data Set claim
4 |  | 0..1 | DDCCCoreDataSetTR | Test Result Core Data Set claim
5 |  | 0..1 | string | VHL
-6 |  | 0..1 | DVCMin | DVCMin
Documentation for this format

## API Information

##### Health Certificate API

Logical Model for the HCERT

Version: 1.0.0

## Endpoints

### GET /StructureDefinition-HCert.schema.json

#### JSON Schema definition for the Logical Model StructureDefinition-HCert

This endpoint serves the JSON Schema definition for the Logical Model StructureDefinition-HCert.

## Schema Definition

### StructureDefinition-HCert

Description: Logical Model for the HCERT

Type: object

Full Schema (JSON)

    {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "$id": "http://smart.who.int/base/StructureDefinition-HCert.schema.json",
      "title": "Health Certificate",
      "description": "Logical Model for the HCERT",
      "type": "object",
      "properties": {
        "resourceType": {
          "type": "string",
          "const": "HCert",
          "description": "Resource type identifier for HCert logical model"
        },
        "1": {
          "$ref": "http://smart.who.int/base/StructureDefinition-HCertDCC.schema.json",
          "description": "HCERT EU DCC"
        },
        "3": {
          "$ref": "http://smart.who.int/base/StructureDefinition-DDCCCoreDataSet.schema.json",
          "description": "DDCC Vaccination claim (PROPOSED)"
        },
        "4": {
          "$ref": "http://smart.who.int/base/StructureDefinition-DDCCCoreDataSet.schema.json",
          "description": "DDCC Test Result claim (PROPOSED)"
        },
        "5": {
          "type": "string",
          "description": "URI of a Verifiable Health Link.  Of the form 'vhlink:/eyJ1cmwiOiJodHRwczovL2Vo....'"
        },
        "-6": {
          "$ref": "http://smart.who.int/base/StructureDefinition-DVCMin.schema.json",
          "description": "Minimal Digital Vaccination Certificate Payload (Proposed)"
        }
      },
      "required": [
        "resourceType"
      ],
      "resourceDefinition": "http://smart.who.int/trust/StructureDefinition/HCert",
      "fhir:parent": "http://hl7.org/fhir/StructureDefinition/Base"
    }

This documentation is automatically generated from the OpenAPI specification.

This structure is derived from Base

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
HCert |  | 0..* | Base | Health Certificate
1 |  | 0..1 | HCertDCC | HCERT EU DCC
3 |  | 0..1 | DDCCCoreDataSetVS | Vaccination Core Data Set claim
4 |  | 0..1 | DDCCCoreDataSetTR | Test Result Core Data Set claim
5 |  | 0..1 | string | VHL
-6 |  | 0..1 | DVCMin | DVCMin
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
HCert |  | 0..* | Base | Health Certificate
1 |  | 0..1 | HCertDCC | HCERT EU DCC
3 |  | 0..1 | DDCCCoreDataSetVS | Vaccination Core Data Set claim
4 |  | 0..1 | DDCCCoreDataSetTR | Test Result Core Data Set claim
5 |  | 0..1 | string | VHL
-6 |  | 0..1 | DVCMin | DVCMin
Documentation for this format

This structure is derived from Base

Summary

Structures

This structure refers to these other structures:

- DDCC Core Data Set Logical Model for Vaccination Status (http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetVS)
- DDCC Core Data Set Logical Model for Test Result (http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetTR)

Key Elements View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
HCert |  | 0..* | Base | Health Certificate
1 |  | 0..1 | HCertDCC | HCERT EU DCC
3 |  | 0..1 | DDCCCoreDataSetVS | Vaccination Core Data Set claim
4 |  | 0..1 | DDCCCoreDataSetTR | Test Result Core Data Set claim
5 |  | 0..1 | string | VHL
-6 |  | 0..1 | DVCMin | DVCMin
Documentation for this format

Differential View

This structure is derived from Base

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
HCert |  | 0..* | Base | Health Certificate
1 |  | 0..1 | HCertDCC | HCERT EU DCC
3 |  | 0..1 | DDCCCoreDataSetVS | Vaccination Core Data Set claim
4 |  | 0..1 | DDCCCoreDataSetTR | Test Result Core Data Set claim
5 |  | 0..1 | string | VHL
-6 |  | 0..1 | DVCMin | DVCMin
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
HCert |  | 0..* | Base | Health Certificate
1 |  | 0..1 | HCertDCC | HCERT EU DCC
3 |  | 0..1 | DDCCCoreDataSetVS | Vaccination Core Data Set claim
4 |  | 0..1 | DDCCCoreDataSetTR | Test Result Core Data Set claim
5 |  | 0..1 | string | VHL
-6 |  | 0..1 | DVCMin | DVCMin
Documentation for this format

This structure is derived from Base

Summary

Structures

This structure refers to these other structures:

- DDCC Core Data Set Logical Model for Vaccination Status (http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetVS)
- DDCC Core Data Set Logical Model for Test Result (http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetTR)

Other representations of profile: CSV, Excel