FHIR Mapping Language (FML)
0.1.0 - STU 1 World

FHIR Mapping Language (FML), published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 0.1.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/mapping-language-ig/ and changes regularly. See the Directory of published versions

StructureMap: TransformEvaluate2

Official URL: http://hl7.org/fhir/uv/mapping-language/StructureMap/TransformEvaluate2 Version: 0.1.0
Standards status: Informative Computable Name: TransformEvaluate2
Other Identifiers: OID:2.16.840.1.113883.4.642.40.89.43.47

Additional examples demonstrating the evaluate transform to execute a FHIRPath expression

Language: en

/// url = 'http://hl7.org/fhir/uv/mapping-language/StructureMap/TransformEvaluate2'
/// version = '0.1.0'
/// name = 'TransformEvaluate2'
/// status = 'active'
/// description = 'Additional examples demonstrating the evaluate transform to execute a FHIRPath expression'

uses "http://hl7.org/fhir/StructureDefinition/Patient" as source
uses "http://hl7.org/fhir/StructureDefinition/Patient" as target

group TransformEvaluate2(source src : Patient, target tgt : Patient) {
  // concatenate all given names using FHIRPath
  src.name as v -> tgt.name as tn then {
    // Although this looks like a fhirpath expression, it is just a string
    // and will put the literal text "v.given.join(' ')" in the `text` target element.
    v -> tn.text = evaluate(v, 'given.join(\' \')') "r2";
    v -> tn.period.start = evaluate(v, @2024-12-01T09:00:00) "dateValue";
  } "r1";
}