description: 'Base StructureDefinition for Timing Type: Specifies an event that may occur multiple times. Timing schedules are used to record when things are planned, expected or requested to occur. The most common usage is in dosage instructions for medications. They are also used when planning care of various kinds, and may be used for reporting the schedule to which past regular activities were carried out.'
package_name: hl7.fhir.core
derivation: specialization
name: Timing
type: Timing
elements:
  event: {short: When the event occurs, type: dateTime, array: true, isSummary: true, index: 0}
  repeat:
    constraint:
      tim-8: {human: 'If there''s a countMax, there must be a count', severity: error, expression: countMax.empty() or count.exists()}
      tim-2: {human: 'if there''s a period, there needs to be period units', severity: error, expression: period.empty() or periodUnit.exists()}
      tim-5: {human: period SHALL be a non-negative value, severity: error, expression: period.exists() implies period >= 0}
      tim-7: {human: 'If there''s a durationMax, there must be a duration', severity: error, expression: durationMax.empty() or duration.exists()}
      tim-4: {human: duration SHALL be a non-negative value, severity: error, expression: duration.exists() implies duration >= 0}
      tim-1: {human: 'if there''s a duration, there needs to be duration units', severity: error, expression: duration.empty() or durationUnit.exists()}
      tim-10: {human: 'If there''s a timeOfDay, there cannot be be a when, or vice versa', severity: error, expression: timeOfDay.empty() or when.empty()}
      tim-9: {human: 'If there''s an offset, there must be a when (and not C, CM, CD, CV)', severity: error, expression: offset.empty() or (when.exists() and ((when in ('C' | 'CM' | 'CD' | 'CV')).not()))}
      tim-6: {human: 'If there''s a periodMax, there must be a period', severity: error, expression: periodMax.empty() or period.exists()}
    short: When the event is to occur
    type: Element
    isSummary: true
    index: 1
    elements:
      boundsRange: {short: 'Length/Range of lengths, or (Start and/or end) limits', type: Range, choiceOf: bounds, isSummary: true, index: 5}
      frequencyMax: {short: Event occurs up to frequencyMax times per period, type: integer, isSummary: true, index: 13}
      boundsPeriod: {short: 'Length/Range of lengths, or (Start and/or end) limits', type: Period, choiceOf: bounds, isSummary: true, index: 6}
      when: {short: Code for time period of occurrence, type: code, array: true, isSummary: true, index: 19}
      offset: {short: Minutes from event (before or after), type: unsignedInt, isSummary: true, index: 20}
      periodUnit: {short: s | min | h | d | wk | mo | a - unit of time (UCUM), type: code, isSummary: true, index: 16}
      frequency: {short: Event occurs frequency times per period, type: integer, defaultValueInteger: 1, isSummary: true, index: 12}
      durationMax: {short: How long when it happens (Max), type: decimal, isSummary: true, index: 10}
      duration: {short: How long when it happens, type: decimal, isSummary: true, index: 9}
      bounds:
        short: Length/Range of lengths, or (Start and/or end) limits
        choices: [boundsDuration, boundsRange, boundsPeriod]
        isSummary: true
        index: 3
      boundsDuration: {short: 'Length/Range of lengths, or (Start and/or end) limits', type: Duration, choiceOf: bounds, isSummary: true, index: 4}
      durationUnit: {short: s | min | h | d | wk | mo | a - unit of time (UCUM), type: code, isSummary: true, index: 11}
      dayOfWeek: {short: mon | tue | wed | thu | fri | sat | sun, type: code, array: true, isSummary: true, index: 17}
      count: {short: Number of times to repeat, type: integer, isSummary: true, index: 7}
      periodMax: {short: Upper limit of period (3-4 hours), type: decimal, isSummary: true, index: 15}
      period: {short: Event occurs frequency times per period, type: decimal, isSummary: true, index: 14}
      countMax: {short: Maximum number of times to repeat, type: integer, isSummary: true, index: 8}
      timeOfDay: {short: Time of day for action, type: time, array: true, isSummary: true, index: 18}
  code: {short: BID | TID | QID | AM | PM | QD | QOD | Q4H | Q6H +, type: CodeableConcept, isSummary: true, index: 21}
package_version: 3.2.0
class: complex-type
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/Timing
base: http://hl7.org/fhir/StructureDefinition/Element
version: null