description: Input Patient Parameter supplied for the individual member match (Patient Demographics). package_name: hl7.fhir.us.davinci-pdex derivation: constraint name: MatchParameters type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/us/davinci-pdex/StructureDefinition/base-ext-match-parameters'} type: uri index: 1 value: choices: [valueReference] index: 3 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/Patient'] index: 4 package_version: 2.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/davinci-pdex/StructureDefinition/base-ext-match-parameters base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.1.0