description: Health Link Payload (DRAFT)\n\nA Health Link URI is generated from this payload according to the algorithm documented [here](https://build.fhir.org/ig/HL7/smart-health-cards-and-links/links-specification.html#smart-health-links-sharing-application-generates-a-smart-health-link-uri)\n\n\n
package_name: smart.who.int.trust-phw
derivation: specialization
name: HealthLinkPayload
type: http://smart.who.int/trust-phw/StructureDefinition/HealthLinkPayload
elements:
  url: {type: string, short: url, index: 0}
  key: {type: string, short: 'Decryption key for processing files returned in the manifest. 43 characters, consisting of 32 random bytes base64urlencoded.', index: 1}
  exp: {type: string, short: 'Optional. Number representing expiration time in Epoch seconds, as a hint to help the Health Link Receiving Application determine if this QR is stale. (Note: epoch times should be parsed into 64-bit numeric types.)', index: 2}
  flag:
    type: string
    short: "Optional. String created by concatenating single-character flags in alphabetical order:\n'L' indicates the Health Link is intended for long-term use and manifest content can evolve over time; \n'P' indicates the Health Link requires a Passcode to resolves; and 'U' indicates the Health Link's url resolves to a single encrypted file accessible via GET, bypassing the manifest and SHALL NOT be used in combination with P.\n\n  "
    index: 3
  label: {type: string, short: Optional. String no longer than 80 characters that provides a short description of the data behind the Health Link., index: 4}
  v: {type: string, short: Optional. Integer representing the Health Links protocol version this Health Link conforms to. MAY be omitted when the default value (1) applies., index: 5}
  type: {type: code, short: Classifying type code to distinguish different types of health links.  If not present then the Health Link is a SMART Health Link., index: 6}
package_version: 0.1.0
class: logical
kind: logical
url: http://smart.who.int/trust-phw/StructureDefinition/HealthLinkPayload
base: http://hl7.org/fhir/StructureDefinition/Base
version: 0.1.0
required: [url, key]