FHIRHelpers
type: Library
node role: treeRoot
id:
  v: FHIRHelpers
text:
  status:
    v: extensions
  div:
    v: Id: FHIRHelpers Version: 4.0.1 Url: FHIRHelpers Type: system: http://terminology.hl7.org/CodeSystem/library-type code: logic-library Date: 2025-10-30 08:19:00+0000 Content: text/cql /* @author: Bryn Rhodes @description: This library defines functions to convert between FHIR data types and CQL system-defined types, as well as functions to support FHIRPath implementation. For more information, the FHIRHelpers wiki page: https://github.com/cqframework/clinical_quality_language/wiki/FHIRHelpers @allowFluent: true */ library FHIRHelpers version '4.0.1' using FHIR version '4.0.1' /* @description: Converts the given [Period](https://hl7.org/fhir/datatypes.html#Period) value to a CQL DateTime Interval @comment: If the start value of the given period is unspecified, the starting boundary of the resulting interval will be open (meaning the start of the interval is unknown, as opposed to interpreted as the beginning of time). */ define function ToInterval(period FHIR.Period): if period is null then null else if period."start" is null then Interval(period."start".value, period."end".value] else Interval[period."start".value, period."end".value] /* @description: Converts a UCUM definite duration unit to a CQL calendar duration unit using conversions specified in the [quantities](https://cql.hl7.org/02-authorsguide.html#quantities) topic of the CQL specification. @comment: Note that for durations above days (or weeks), the conversion is understood to be approximate */ define function ToCalendarUnit(unit System.String): case unit when 'ms' then 'millisecond' when 's' then 'second' when 'min' then 'minute' when 'h' then 'hour' when 'd' then 'day' when 'wk' then 'week' when 'mo' then 'month' when 'a' then 'year' else unit end /* @description: Converts the given FHIR [Quantity](https://hl7.org/fhir/datatypes.html#Quantity) value to a CQL Quantity @comment: If the given quantity has a comparator specified, a runtime error is raised. If the given quantity has a system other than UCUM (…
extension:
  url:
    v: http://hl7.org/fhir/StructureDefinition/structuredefinition-wg
    l: structuredefinition-wg
  value: Code
    v: fhir
url:
  v: https://nhicore.nhi.gov.tw/cql/Library/FHIRHelpers
  l: FHIRHelpers
version:
  v: 4.0.1
name:
  v: FHIRHelpers
status:
  v: active
experimental:
  v: false
type:
  coding:
    system:
      v: http://terminology.hl7.org/CodeSystem/library-type
      l: library-type
    code:
      v: logic-library
date:
  v: 2025-10-30T08:19:00+00:00
content:
  content type:
    v: text/cql
content:
  content type:
    v: application/elm+xml
content:
  content type:
    v: application/elm+json