description: 'Identifies the person(s) using the device, their role in using the device and, optionally, the nature of their relationship(s) to the device during use.\nThe user is captured using a profile (e.g., HL7 RelatedPerson profile) and the relationship is indicated as Custodian, Maintainer, Patient, or Operator. \n\nExample Users: \n- Patient \n- Related Person: Spouse, child \n- Practitioner: Home Health Aide, Nursing Aid, Occupational Therapist, Physical Therapist, Speech-Language Pathologist ' package_name: hl7.fhir.us.pacio-pfe derivation: constraint name: PFEDeviceRequestUser type: Extension elements: extension: index: 0 slicing: slices: user: match: {} schema: short: Device User _required: true index: 1 extensions: {} elements: extension: {index: 2} url: pattern: {type: Uri, value: user} index: 3 value: choices: [valueReference] index: 5 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/CareTeam', 'http://hl7.org/fhir/StructureDefinition/Patient', 'http://hl7.org/fhir/StructureDefinition/Practitioner', 'http://hl7.org/fhir/StructureDefinition/PractitionerRole', 'http://hl7.org/fhir/StructureDefinition/RelatedPerson'] index: 6 relationship: match: {} schema: short: User relationship array: true index: 7 extensions: {} elements: extension: {index: 8} url: pattern: {type: Uri, value: relationship} index: 9 value: choices: [valueCodeableConcept] index: 11 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 12} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/pacio-pfe/StructureDefinition/pfe-device-request-user'} index: 13 value: choices: [] index: 15 package_version: 3.0.0-ballot extensions: user: url: null short: Device User _required: true index: 1 extensions: {} elements: extension: {index: 2} url: pattern: {type: Uri, value: user} index: 3 value: choices: [valueReference] index: 5 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/CareTeam', 'http://hl7.org/fhir/StructureDefinition/Patient', 'http://hl7.org/fhir/StructureDefinition/Practitioner', 'http://hl7.org/fhir/StructureDefinition/PractitionerRole', 'http://hl7.org/fhir/StructureDefinition/RelatedPerson'] index: 6 relationship: url: null short: User relationship array: true index: 7 extensions: {} elements: extension: {index: 8} url: pattern: {type: Uri, value: relationship} index: 9 value: choices: [valueCodeableConcept] index: 11 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 12} class: extension kind: complex-type url: http://hl7.org/fhir/us/pacio-pfe/StructureDefinition/pfe-device-request-user base: http://hl7.org/fhir/StructureDefinition/Extension version: 3.0.0-ballot required: [extension]