description: Base StructureDefinition for Quantity Type
package_name: hl7.fhir.r2b.core
derivation: specialization
name: Quantity
type: null
elements:
  value:
    isModifier: false
    short: Numerical value (with implicit precision)
    index: 0
    comments: The implicit precision in the value should always be honored. Monetary values have their own rules for handling precision (refer to standard accounting text books).
    type: decimal
    mustSupport: false
    maxLength: 0
    base: {max: '1', min: 0, path: Quantity.value}
    isSummary: true
  comparator:
    isModifier: true
    short: < | <= | >= | > - how to understand the value
    index: 1
    comments: This is labeled as "Is Modifier" because the comparator modifies the interpretation of the value significantly. If there is no comparator, then there is no modification of the value.
    type: code
    mustSupport: false
    meaningWhenMissing: If there is no comparator, then there is no modification of the value
    maxLength: 0
    base: {max: '1', min: 0, path: Quantity.comparator}
    isSummary: true
  unit:
    isModifier: false
    short: Unit representation
    type: string
    mustSupport: false
    maxLength: 0
    base: {max: '1', min: 0, path: Quantity.unit}
    isSummary: true
    index: 2
  system:
    isModifier: false
    short: System that defines coded unit form
    type: uri
    mustSupport: false
    maxLength: 0
    base: {max: '1', min: 0, path: Quantity.system}
    isSummary: true
    index: 3
  code:
    isModifier: false
    short: Coded form of the unit
    index: 4
    comments: The preferred system is UCUM, but SNOMED CT can also be used (for customary units) or ISO 4217 for currency.  The context of use may additionally require a code from a particular system.
    type: code
    mustSupport: false
    maxLength: 0
    base: {max: '1', min: 0, path: Quantity.code}
    isSummary: true
package_version: 1.4.0
class: datatype
kind: datatype
url: http://hl7.org/fhir/StructureDefinition/Quantity
base: http://hl7.org/fhir/StructureDefinition/Element
version: null