description: Reference to reagents used to generate this observation.  This is intended for this for in-lab transactions between instruments and Laboratory Information Systems (LIS).
package_name: hl7.fhir.core
derivation: constraint
name: reagent
type: Extension
elements:
  extension: {index: 0}
  url:
    type: uri
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/observation-reagent'}
    index: 1
  valueReference:
    type: Reference
    refers: ['http://hl7.org/fhir/StructureDefinition/Substance']
    index: 2
package_version: 3.5.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/observation-reagent
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null