description: The SMART Health Link Payload object package_name: hl7.fhir.uv.smart-health-cards-and-links derivation: specialization name: ShlPayload type: http://hl7.org/fhir/uv/smart-health-cards-and-links/StructureDefinition/ShlPayload elements: url: {type: url, short: Manifest URL for the SMART Health Link., index: 0} key: {type: string, short: Decryption key, index: 1} exp: {type: decimal, short: Expiration time, index: 2} flag: {type: string, short: Flag indicating link characteristics., index: 3} label: short: short description of the data behind the SMART Health Link. type: string base: {max: '1', min: 0, path: ShlPayload.flag} index: 4 v: {type: integer, short: Protocol version, index: 5} package_version: 1.0.0 class: logical kind: logical url: http://hl7.org/fhir/uv/smart-health-cards-and-links/StructureDefinition/ShlPayload base: http://hl7.org/fhir/StructureDefinition/Base version: 1.0.0 required: [url, key]