WHO SMART Trust
1.6.0 - ci-build

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/fix/rate-limit-nightly-build-issue and changes regularly. See the Directory of published versions

## Logical Model: HCert - JSON Profile

Active as of 2026-07-23

JSON representation of the HCert logical model.

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    {
      "resourceType" : "StructureDefinition",
      "id" : "HCert",
      "text" : {
        "status" : "extensions",
        "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: StructureDefinition HCert</b></p><table border=\"0\" cellpadding=\"0\" cellspacing=\"0\" style=\"border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;\"><tr style=\"border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top\"><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"The logical name of the element\">Name</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Information about the use of the element\">Flags</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Minimum and Maximum # of times the element can appear in the instance\">Card.</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px; width: 100px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Reference to the type of the element\">Type</a></th><th style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px\" class=\"hierarchy\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Additional information about the element\">Description &amp; Constraints</a><span style=\"float: right\"><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64, \" alt=\"doco\" style=\"background-color: inherit\"/></a></span></th></tr><tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_element.gif\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Element\" class=\"hierarchy\"/> <a href=\"StructureDefinition-HCert-definitions.html#HCert\" title=\"Logical Model for the HCERT\">HCert</a><a name=\"HCert\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><span style=\"opacity: 0.5\">0</span><span style=\"opacity: 0.5\">..</span><span style=\"opacity: 0.5\">*</span></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R5/types.html#Base\">Base</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">Health Certificate</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_resource.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Resource\" class=\"hierarchy\"/> <a href=\"StructureDefinition-HCert-definitions.html#HCert.1\" title=\"HCERT EU DCC\">1</a><a name=\"HCert.1\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://smart.who.int/ddcc/1.0.1/StructureDefinition-HCertDCC.html\">HCertDCC</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">HCERT EU DCC</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_resource.png\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Resource\" class=\"hierarchy\"/> <a href=\"StructureDefinition-HCert-definitions.html#HCert.3\" title=\"DDCC Vaccination claim (PROPOSED)\">3</a><a name=\"HCert.3\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://smart.who.int/ddcc/1.0.1/StructureDefinition-DDCCCoreDataSetVS.html\" title=\"http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet\">DDCCCoreDataSetVS</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">Vaccination Core Data Set claim</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_resource.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Resource\" class=\"hierarchy\"/> <a href=\"StructureDefinition-HCert-definitions.html#HCert.4\" title=\"DDCC Test Result claim (PROPOSED)\">4</a><a name=\"HCert.4\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://smart.who.int/ddcc/1.0.1/StructureDefinition-DDCCCoreDataSetTR.html\" title=\"http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet\">DDCCCoreDataSetTR</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">Test Result Core Data Set claim</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck10.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_primitive.png\" alt=\".\" style=\"background-color: white; background-color: inherit\" title=\"Primitive Data Type\" class=\"hierarchy\"/> <a href=\"StructureDefinition-HCert-definitions.html#HCert.5\" title=\"URI of a Verifiable Health Link.  Of the form 'vhlink:/eyJ1cmwiOiJodHRwczovL2Vo....' \">5</a><a name=\"HCert.5\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://hl7.org/fhir/R5/datatypes.html#string\">string</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">VHL</td></tr>\r\n<tr style=\"border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7\"><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck00.png)\" class=\"hierarchy\"><img src=\"tbl_spacer.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"tbl_vjoin_end.png\" alt=\".\" style=\"background-color: inherit\" class=\"hierarchy\"/><img src=\"icon_resource.png\" alt=\".\" style=\"background-color: #F7F7F7; background-color: inherit\" title=\"Resource\" class=\"hierarchy\"/> <a href=\"StructureDefinition-HCert-definitions.html#HCert.-6\" title=\"Minimal Digital Vaccination Certificate Payload (Proposed)\">-6</a><a name=\"HCert.-6\"> </a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"/><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">0..1</td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\"><a href=\"http://smart.who.int/trust-phw/v0.1.0/StructureDefinition-DVCMin.html\">DVCMin</a></td><td style=\"vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px\" class=\"hierarchy\">DVCMin</td></tr>\r\n<tr><td colspan=\"5\" class=\"hierarchy\"><br/><a href=\"https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views\" title=\"Legend for this format\"><img src=\"data:image/png;base64, \" alt=\"doco\" style=\"background-color: inherit\"/> Documentation for this format</a></td></tr></table></div>"
      },
      "url" : "http://smart.who.int/trust/StructureDefinition/HCert",
      "version" : "1.6.0",
      "name" : "HCert",
      "title" : "Health Certificate",
      "status" : "active",
      "date" : "2026-07-23T08:15:22+00:00",
      "publisher" : "WHO",
      "contact" : [
        {
          "name" : "WHO",
          "telecom" : [
            {
              "system" : "url",
              "value" : "http://who.int"
            }
          ]
        }
      ],
      "description" : "Logical Model for the HCERT",
      "jurisdiction" : [
        {
          "coding" : [
            {
              "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
              "code" : "001"
            }
          ]
        }
      ],
      "fhirVersion" : "5.0.0",
      "mapping" : [
        {
          "identity" : "rim",
          "uri" : "http://hl7.org/v3",
          "name" : "RIM Mapping"
        }
      ],
      "kind" : "logical",
      "abstract" : false,
      "type" : "http://smart.who.int/trust/StructureDefinition/HCert",
      "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Base",
      "derivation" : "specialization",
      "snapshot" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
            "valueString" : "5.0.0"
          }
        ],
        "element" : [
          {
            "id" : "HCert",
            "path" : "HCert",
            "short" : "Health Certificate",
            "definition" : "Logical Model for the HCERT",
            "min" : 0,
            "max" : "*",
            "base" : {
              "path" : "Base",
              "min" : 0,
              "max" : "*"
            },
            "isModifier" : false,
            "mapping" : [
              {
                "identity" : "rim",
                "map" : "n/a"
              }
            ]
          },
          {
            "id" : "HCert.1",
            "path" : "HCert.1",
            "short" : "HCERT EU DCC",
            "definition" : "HCERT EU DCC",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "HCert.1",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "http://smart.who.int/ddcc/StructureDefinition/HCertDCC"
              }
            ]
          },
          {
            "id" : "HCert.3",
            "path" : "HCert.3",
            "short" : "Vaccination Core Data Set claim",
            "definition" : "DDCC Vaccination claim (PROPOSED)",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "HCert.3",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet",
                "profile" : [
                  🔗 "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetVS"
                ]
              }
            ]
          },
          {
            "id" : "HCert.4",
            "path" : "HCert.4",
            "short" : "Test Result Core Data Set claim",
            "definition" : "DDCC Test Result claim (PROPOSED)",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "HCert.4",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet",
                "profile" : [
                  🔗 "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetTR"
                ]
              }
            ]
          },
          {
            "id" : "HCert.5",
            "path" : "HCert.5",
            "short" : "VHL",
            "definition" : "URI of a Verifiable Health Link.  Of the form 'vhlink:/eyJ1cmwiOiJodHRwczovL2Vo....'",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "HCert.5",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "string"
              }
            ]
          },
          {
            "id" : "HCert.-6",
            "path" : "HCert.-6",
            "short" : "DVCMin",
            "definition" : "Minimal Digital Vaccination Certificate Payload (Proposed)",
            "min" : 0,
            "max" : "1",
            "base" : {
              "path" : "HCert.-6",
              "min" : 0,
              "max" : "1"
            },
            "type" : [
              {
                "code" : "http://smart.who.int/trust-phw/StructureDefinition/DVCMin"
              }
            ]
          }
        ]
      },
      "differential" : {
        "element" : [
          {
            "id" : "HCert",
            "path" : "HCert",
            "short" : "Health Certificate",
            "definition" : "Logical Model for the HCERT"
          },
          {
            "id" : "HCert.1",
            "path" : "HCert.1",
            "short" : "HCERT EU DCC",
            "definition" : "HCERT EU DCC",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "http://smart.who.int/ddcc/StructureDefinition/HCertDCC"
              }
            ]
          },
          {
            "id" : "HCert.3",
            "path" : "HCert.3",
            "short" : "Vaccination Core Data Set claim",
            "definition" : "DDCC Vaccination claim (PROPOSED)",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet",
                "profile" : [
                  🔗 "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetVS"
                ]
              }
            ]
          },
          {
            "id" : "HCert.4",
            "path" : "HCert.4",
            "short" : "Test Result Core Data Set claim",
            "definition" : "DDCC Test Result claim (PROPOSED)",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSet",
                "profile" : [
                  🔗 "http://smart.who.int/ddcc/StructureDefinition/DDCCCoreDataSetTR"
                ]
              }
            ]
          },
          {
            "id" : "HCert.5",
            "path" : "HCert.5",
            "short" : "VHL",
            "definition" : "URI of a Verifiable Health Link.  Of the form 'vhlink:/eyJ1cmwiOiJodHRwczovL2Vo....' ",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "string"
              }
            ]
          },
          {
            "id" : "HCert.-6",
            "path" : "HCert.-6",
            "short" : "DVCMin",
            "definition" : "Minimal Digital Vaccination Certificate Payload (Proposed)",
            "min" : 0,
            "max" : "1",
            "type" : [
              {
                "code" : "http://smart.who.int/trust-phw/StructureDefinition/DVCMin"
              }
            ]
          }
        ]
      }
    }