/// url = 'https://fhir.slade360.co.ke/fhir/StructureMap/ExtractPaediatricNutritionAssessment'
/// name = 'ExtractPaediatricNutritionAssessment'
/// title = 'Paediatric Nutrition Assessment Extraction'
/// status = 'active'
/// description = 'The anthropometry is the part of this form that has to be a time series, so every measurement becomes its own Observation under its real LOINC code -- birth weight 8339-4, weight 29463-7, height 8302-2, head circumference 9843-4, MUAC 56072-2 -- rather than components of a panel nobody can plot. Admission and discharge weight are both 29463-7 and are told apart by their code text, because they are the same measurement taken twice and a growth chart should show them on one line. The two Z-score-style derivations the form computes are decimals with the unit attached by the map. The nutritional diagnosis becomes a Condition and the prescription a CarePlan, so a child discharged on a feeding regimen leaves with a plan and not a paragraph.'

uses "http://hl7.org/fhir/StructureDefinition/QuestionnaireResponse" alias QR as source
uses "http://hl7.org/fhir/StructureDefinition/Bundle" alias Bundle as target
uses "http://hl7.org/fhir/StructureDefinition/Observation" alias Observation as target
uses "http://hl7.org/fhir/StructureDefinition/Condition" alias Condition as target
uses "http://hl7.org/fhir/StructureDefinition/CarePlan" alias CarePlan as target

group ExtractPaediatricNutritionAssessment(source qr : QR, target bundle : Bundle) {
  qr -> bundle.type = 'transaction' "setBundleType";
  // ── Anthropometry ───────────────────────────────────────────────────────
  qr.item as g where (linkId = 'anthropometry') then {
    g.item as it where ((linkId = 'anthropometry/birth-weight') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '8339-4' "cd";
          it -> cg.display = 'Birth weight Measured' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = v "set";
      };
    } "measure_8339_4";
    g.item as it where ((linkId = 'anthropometry/admission-weight') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '29463-7' "cd";
          it -> cg.display = 'Body weight' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = v "set";
      };
      it ->  obs.note as n,  n.text = 'Weight on admission' "note";
    } "measure_29463_7";
    g.item as it where ((linkId = 'anthropometry/height') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '8302-2' "cd";
          it -> cg.display = 'Body height' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = v "set";
      };
    } "measure_8302_2";
    g.item as it where ((linkId = 'anthropometry/head-circumference') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '9843-4' "cd";
          it -> cg.display = 'Head Occipital-frontal circumference' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = v "set";
      };
    } "measure_9843_4";
    g.item as it where ((linkId = 'anthropometry/muac') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '56072-2' "cd";
          it -> cg.display = 'Circumference Mid upper arm - right' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = v "set";
      };
    } "measure_56072_2";
    g.item as it where ((linkId = 'anthropometry/discharge-weight') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '29463-7' "cd";
          it -> cg.display = 'Body weight' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = v "set";
      };
      it ->  obs.note as n,  n.text = 'Weight on discharge' "note";
    } "measure_29463_72";
    // The two derivations. Decimals, because a calculatedExpression on this
    // engine cannot produce a unit-bearing Quantity -- `decimal * 1 'kg/m2'`
    // is rejected as incompatible operand types in both orders -- so the form
    // computes the number and the map gives it its unit. Safe here because the
    // unit is fixed by the form and not chosen by whoever fills it in.
    g.item as it where ((linkId = 'anthropometry/weight-for-age-z') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '77606-2' "cd";
          it -> cg.display = 'Weight-for-length Per age and sex' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = create('Quantity') as q then {
          v -> q.value = v "qValue";
          v -> q.unit = 'standard deviation' "qUnit";
          v -> q.system = 'http://unitsofmeasure.org' "qSystem";
          v -> q.code = '1' "qCode";
        } "quantity";
      };
      it ->  obs.note as n,  n.text = 'Weight-for-age Z score as computed on the assessment form' "note";
    } "measureq_77606_2";
    g.item as it where ((linkId = 'anthropometry/weight-for-height-ratio') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetVitalSignsCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-weight-for-height-ratio' "cd";
          it -> cg.display = 'Weight-for-height ratio' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = create('Quantity') as q then {
          v -> q.value = v "qValue";
          v -> q.unit = 'ratio' "qUnit";
          v -> q.system = 'http://unitsofmeasure.org' "qSystem";
          v -> q.code = '1' "qCode";
        } "quantity";
      };
    } "measureq_nutrition_assessment";
    g.item as it where ((linkId = 'anthropometry/clinical') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetSurveyCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '29545-1' "cd";
          it -> cg.display = 'Physical findings note' "dsp";
        } "coding";
        it -> cc.text = 'Clinical findings on nutritional examination' "codeText";
      } "code";
      it.answer first as a then {
        a.value as txt ->  obs.note as n,  n.text = txt "text";
      };
    } "narr_29545_1";
  } "anthropometryGroup";
  // ── Feeding history ─────────────────────────────────────────────────────
  qr.item as g where (linkId = 'nutrition-history') then {
    g.item as it where ((linkId = 'nutrition-history/breast-feeding') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetSurveyCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '63895-7' "cd";
          it -> cg.display = 'Breastfeeding status' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as txt ->  obs.note as n,  n.text = txt "text";
      };
    } "narr_63895_7";
    g.item as it where ((linkId = 'nutrition-history/age-other-foods-introduced') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetSurveyCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-age-other-foods-were-introduced' "cd";
          it -> cg.display = 'Age other foods were introduced' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as v -> obs.value = v "set";
      };
    } "measure_nutrition_assessment";
    g.item as it where ((linkId = 'nutrition-history/usual-and-current-intake') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetSurveyCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-usual-and-current-dietary-intake' "cd";
          it -> cg.display = 'Usual and current dietary intake' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as txt ->  obs.note as n,  n.text = txt "text";
      };
    } "narr_nutrition_usual_and_current_dietary_intake";
    g.item as it where ((linkId = 'nutrition-history/diet-history') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetSurveyCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-diet-history' "cd";
          it -> cg.display = 'Diet history' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as txt ->  obs.note as n,  n.text = txt "text";
      };
    } "narr_nutrition_diet_history";
  } "nutritionHistoryGroup";
  // ── Family and psychosocial history ─────────────────────────────────────
  // One Observation with the family facts as components. Together, because
  // these are read as a picture of the household and not one at a time: a
  // fifteen-year-old mother with four other children is the finding, and no
  // single component says it.
  qr.item as g where ((linkId = 'family-history') and item.answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
    qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
    qr -> obs then SetSurveyCategory(qr, obs) "category";
    g -> obs.code as cc then {
      g -> cc.coding as cg then {
        g -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
        g -> cg.code = 'nutrition-family-and-psychosocial-history' "cd";
        g -> cg.display = 'Family and psychosocial history' "dsp";
      } "coding";
    } "code";
    g.item as it where ((linkId = 'family-history/child-birth-order') and answer.value.exists()) -> obs.component as comp then {
      it -> comp.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-birth-order-of-the-child' "cd";
          it -> cg.display = 'Birth order of the child' "dsp";
        } "coding";
      } "code";
      it -> comp then SetComponentValue(it, comp) "value";
    } "comp_nutrition_birth_order_of_the_child";
    g.item as it where ((linkId = 'family-history/parents-marital-status') and answer.value.exists()) -> obs.component as comp then {
      it -> comp.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-marital-status-of-the-parents' "cd";
          it -> cg.display = 'Marital status of the parents' "dsp";
        } "coding";
      } "code";
      it -> comp then SetComponentCodedValue(it, comp) "value";
    } "comp_nutrition_marital_status_of_the_parents";
    g.item as it where ((linkId = 'family-history/ages-of-siblings') and answer.value.exists()) -> obs.component as comp then {
      it -> comp.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-ages-of-siblings' "cd";
          it -> cg.display = 'Ages of siblings' "dsp";
        } "coding";
      } "code";
      it -> comp then SetComponentValue(it, comp) "value";
    } "comp_nutrition_ages_of_siblings";
    g.item as it where ((linkId = 'family-history/mothers-age') and answer.value.exists()) -> obs.component as comp then {
      it -> comp.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-age-of-the-mother' "cd";
          it -> cg.display = 'Age of the mother' "dsp";
        } "coding";
      } "code";
      it -> comp then SetComponentValue(it, comp) "value";
    } "comp_nutrition_age_of_the_mother";
    g.item as it where ((linkId = 'family-history/mothers-occupation') and answer.value.exists()) -> obs.component as comp then {
      it -> comp.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-occupation-of-the-mother' "cd";
          it -> cg.display = 'Occupation of the mother' "dsp";
        } "coding";
      } "code";
      it -> comp then SetComponentValue(it, comp) "value";
    } "comp_nutrition_occupation_of_the_mother";
    g.item as it where ((linkId = 'family-history/fathers-age') and answer.value.exists()) -> obs.component as comp then {
      it -> comp.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-age-of-the-father' "cd";
          it -> cg.display = 'Age of the father' "dsp";
        } "coding";
      } "code";
      it -> comp then SetComponentValue(it, comp) "value";
    } "comp_nutrition_age_of_the_father";
    g.item as it where ((linkId = 'family-history/fathers-occupation') and answer.value.exists()) -> obs.component as comp then {
      it -> comp.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-occupation-of-the-father' "cd";
          it -> cg.display = 'Occupation of the father' "dsp";
        } "coding";
      } "code";
      it -> comp then SetComponentValue(it, comp) "value";
    } "comp_nutrition_occupation_of_the_father";
    g.item as it where (linkId = 'family-history/other-psychosocial') then {
      it.answer first as a then {
        a.value as txt ->  obs.note as n,  n.text = txt "text";
      };
    } "note";
  } "familyHistoryObservation";
  qr.item as it where ((linkId = 'social-economic-education-status') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
    qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
    qr -> obs then SetSurveyCategory(qr, obs) "category";
    it -> obs.code as cc then {
      it -> cc.coding as cg then {
        it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
        it -> cg.code = 'nutrition-social-economic-and-education-status' "cd";
        it -> cg.display = 'Social, economic and education status' "dsp";
      } "coding";
    } "code";
    it.answer first as a then {
      a.value as txt ->  obs.note as n,  n.text = txt "text";
    };
  } "narr_nutrition_social_economic_and_education_status";
  qr.item as it where ((linkId = 'medical-history') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
    qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
    qr -> obs then SetSurveyCategory(qr, obs) "category";
    it -> obs.code as cc then {
      it -> cc.coding as cg then {
        it -> cg.system = 'http://loinc.org' "sys";
        it -> cg.code = '11348-0' "cd";
        it -> cg.display = 'History of Past illness note' "dsp";
      } "coding";
      it -> cc.text = 'Medical history on the nutrition assessment' "codeText";
    } "code";
    it.answer first as a then {
      a.value as txt ->  obs.note as n,  n.text = txt "text";
    };
  } "narr_11348_0";
  qr.item as g where (linkId = 'context') then {
    g.item as it where ((linkId = 'context/residence') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Observation') as obs then {
      qr ->  obs,  entry then BuildObsBase(qr, obs, entry) "base";
      qr -> obs then SetSurveyCategory(qr, obs) "category";
      it -> obs.code as cc then {
        it -> cc.coding as cg then {
          it -> cg.system = 'https://fhir.slade360.co.ke/fhir/CodeSystem/concept-codesystem' "sys";
          it -> cg.code = 'nutrition-residence-of-the-child' "cd";
          it -> cg.display = 'Residence of the child' "dsp";
        } "coding";
      } "code";
      it.answer first as a then {
        a.value as txt ->  obs.note as n,  n.text = txt "text";
      };
    } "narr_nutrition_residence_of_the_child";
  } "contextGroup";
  // ── The nutritional diagnosis ───────────────────────────────────────────
  // A Condition and not an Observation. Severe acute malnutrition is a
  // diagnosis a child is treated for and discharged from, which is exactly
  // what a Condition tracks and an Observation does not.
  qr.item as g where (linkId = 'assessment') then {
    g.item as it where ((linkId = 'assessment/nutritional-diagnosis') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('Condition') as cond then {
      qr ->  cond,  entry then BuildConditionBase(qr, cond, entry) "base";
      it -> cond.clinicalStatus as cs then {
        it -> cs.coding as cg then {
          it -> cg.system = 'http://terminology.hl7.org/CodeSystem/condition-clinical' "sys";
          it -> cg.code = 'active' "cd";
          it -> cg.display = 'Active' "dsp";
        } "coding";
      } "clinicalStatus";
      it -> cond.category as cat then {
        it -> cat.coding as cg then {
          it -> cg.system = 'http://terminology.hl7.org/CodeSystem/condition-category' "sys";
          it -> cg.code = 'problem-list-item' "cd";
          it -> cg.display = 'Problem List Item' "dsp";
        } "coding";
      } "category";
      it.answer first as a then {
        a.value as txt ->  cond.code as cc,  cc.text = txt "codeText";
      };
      qr.authored as t -> cond.recordedDate = t "recordedDate";
      qr.encounter as e -> cond.encounter = e;
      qr.item as ctx where (linkId = 'context') then {
        ctx.item as dx where ((linkId = 'context/diagnosis') and answer.value.exists()) then {
          dx.answer first as a then {
            a.value as txt ->  cond.note as n,  n.text = txt "admittingDiagnosisNote";
          };
        } "diagnosisRule";
      } "contextGroupForCondition";
      // R5 dropped Condition.asserter and .recorder for .participant, which
      // carries the actor and what part they played. Writing asserter fails at
      // transform time with "invalid property 'asserter' on type Condition".
      g.item as ab where ((linkId = 'assessment/assessed-by') and answer.value.exists()) then {
        ab.answer first as a then {
          a.value as ref -> cond.participant as part then {
            ref -> part.actor = ref "actor";
            ref -> part.function as fn then {
              ref -> fn.coding as fcg then {
                ref -> fcg.system = 'http://terminology.hl7.org/CodeSystem/provenance-participant-type' "sys";
                ref -> fcg.code = 'author' "cd";
                ref -> fcg.display = 'Author' "dsp";
              } "coding";
            } "function";
          } "participant";
        };
      } "asserterRule";
    } "nutritionalDiagnosis";
    // ── The prescription ──────────────────────────────────────────────────
    g.item as it where ((linkId = 'assessment/prescription') and answer.value.exists()) ->  bundle.entry as entry,  entry.resource = create('CarePlan') as plan then {
      qr ->  plan,  entry then BuildCarePlanBase(qr, plan, entry) "base";
      it -> plan.status = 'active' "status";
      it -> plan.intent = 'plan' "intent";
      it -> plan.title = 'Nutrition prescription' "title";
      qr.authored as t -> plan.created = t "created";
      qr.encounter as e -> plan.encounter = e;
      it -> plan.category as cat then {
        it -> cat.coding as cg then {
          it -> cg.system = 'http://loinc.org' "sys";
          it -> cg.code = '75303-8' "cd";
          it -> cg.display = 'Nutrition assessment Narrative' "dsp";
        } "coding";
      } "category";
      it.answer first as a then {
        a.value as txt -> plan.description = txt "description";
      };
      g.item as ab where ((linkId = 'assessment/assessed-by') and answer.value.exists()) then {
        ab.answer first as a then {
          a.value as ref -> plan.contributor = ref "contributor";
        };
      } "contributorRule";
      g.item as ao where ((linkId = 'assessment/assessed-on') and answer.value.exists()) then {
        ao.answer first as a then {
          a.value as v ->  plan.period as per,  per.start = cast(v, 'dateTime') "periodStart";
        };
      } "assessedOnRule";
      g.item as rm where ((linkId = 'assessment/remarks') and answer.value.exists()) then {
        rm.answer first as a then {
          a.value as txt ->  plan.note as n,  n.text = txt "remarksNote";
        };
      } "remarksRule";
    } "nutritionCarePlan";
  } "assessmentGroup";
}

// ─────────────────────────────────────────────────────────────────────────────
// Shared scaffolding. Repeated in each map rather than imported: the transform
// engine resolves `imports` against whatever StructureMaps happen to be on the
// server, and a form that stops extracting because a shared map was not
// uploaded is a worse failure than a duplicated group.
// Two notes on what the publisher's StructureMap validator says about this file.
// Source parameters below are left untyped on purpose. Writing `: Element` makes
// the validator compare QuestionnaireResponse.item against the literal 'Element'
// and report them as incompatible with each other, which is noise, not a finding.
// `evaluate(context, expression)` is flagged as "takes 1 parameter but 2 were
// found". Leave it. The FML parser in the same jar refuses the one-argument form
// outright -- it wants a parameter, a comma, then the FHIRPath -- so the
// publisher is objecting to what its own compiler emits. Two arguments is the
// only form that compiles, and it is what the R5 transform engine executes.
// ─────────────────────────────────────────────────────────────────────────────
group BuildObsBase(source qr : QR, target obs : Observation, target entry) {
  qr -> obs then SetResponseProvenance(qr, obs) "responseProvenance";
  qr -> obs.id = uuid() then SetObservationFullUrl(obs, entry) "idAndFullUrl";
  qr -> entry.request as request then {
    qr -> request.method = 'POST' "requestMethod";
    qr -> request.url = 'Observation' "requestUrl";
  } "entryRequest";
  qr -> obs.status = 'final' "status";
  qr.subject as s -> obs.subject = s;
  qr.encounter as e -> obs.encounter = e;
  qr.authored as t -> obs.effective = t "effective";
  qr.source as src -> obs.performer = src "performerFromSource";
  qr where (source.exists().not()) then {
    qr.author as a -> obs.performer = a "performerFromAuthor";
  } "performerFallback";
  // A stored response's id already reads "QuestionnaireResponse/<id>", so it is
  // a relative reference as it stands. The hasValue() guard is what stops an
  // unsaved response -- one posted straight to $extract rather than saved first
  // -- from writing "QuestionnaireResponse/null" into the record.
  qr.id as qid where ($this.hasValue()) ->  obs.derivedFrom = create('Reference') as ref,  ref.reference = qid "linkQuestionnaireResponse";
}

group SetObservationFullUrl(source obs : Observation, target entry) {
  obs.id as id -> entry.fullUrl = append('https://fhir.slade360.co.ke/fhir/Observation/', id) "assignFullUrl";
}

// The two answer shapes a component can carry. Both read the answer through the
// untyped `.value` accessor: reading `valueCoding` or `valueQuantity` by its
// typed property name fails at transform time on HAPI R5 with "Attempt to read
// invalid property ... on QuestionnaireResponse.item.answer".
group SetComponentCodedValue(source it, target comp) {
  it.answer first as a then {
    a.value as cv -> comp.value = create('CodeableConcept') as cc then {
      cv -> cc.coding = cv "valueCoding";
      cv.display as d -> cc.text = d "valueText";
    } "codedValue";
  } "componentAnswer";
}

group SetComponentValue(source it, target comp) {
  it.answer first as a then {
    a.value as v -> comp.value = v "plainValue";
  } "componentAnswer";
}

group SetSurveyCategory(source qr : QR, target obs : Observation) {
  qr -> obs.category as cat then {
    qr -> cat.coding as coding then {
      qr -> coding.system = 'http://terminology.hl7.org/CodeSystem/observation-category' "categorySystem";
      qr -> coding.code = 'survey' "categoryCode";
      qr -> coding.display = 'Survey' "categoryDisplay";
    } "categoryCoding";
  } "category";
}

group SetVitalSignsCategory(source qr : QR, target obs : Observation) {
  qr -> obs.category as cat then {
    qr -> cat.coding as coding then {
      qr -> coding.system = 'http://terminology.hl7.org/CodeSystem/observation-category' "categorySystem";
      qr -> coding.code = 'vital-signs' "categoryCode";
      qr -> coding.display = 'Vital Signs' "categoryDisplay";
    } "categoryCoding";
  } "category";
}

group BuildConditionBase(source qr : QR, target r : Condition, target entry) {
  qr -> r then SetResponseProvenance(qr, r) "responseProvenance";
  qr -> r.id = uuid() then SetConditionFullUrl(r, entry) "idAndFullUrl";
  qr -> entry.request as request then {
    qr -> request.method = 'POST' "requestMethod";
    qr -> request.url = 'Condition' "requestUrl";
  } "entryRequest";
  qr.subject as s -> r.subject = s;
}

group SetConditionFullUrl(source r : Condition, target entry) {
  r.id as id -> entry.fullUrl = append('https://fhir.slade360.co.ke/fhir/Condition/', id) "assignFullUrl";
}

group BuildCarePlanBase(source qr : QR, target r : CarePlan, target entry) {
  qr -> r then SetResponseProvenance(qr, r) "responseProvenance";
  qr -> r.id = uuid() then SetCarePlanFullUrl(r, entry) "idAndFullUrl";
  qr -> entry.request as request then {
    qr -> request.method = 'POST' "requestMethod";
    qr -> request.url = 'CarePlan' "requestUrl";
  } "entryRequest";
  qr.subject as s -> r.subject = s;
}

group SetCarePlanFullUrl(source r : CarePlan, target entry) {
  r.id as id -> entry.fullUrl = append('https://fhir.slade360.co.ke/fhir/CarePlan/', id) "assignFullUrl";
}

// ── Provenance and tenancy ───────────────────────────────────────────────────
// Two tags on everything this map creates. The first says which questionnaire
// produced it, so a form that reopens mid-admission recalls its own earlier
// entries and not another form's. The second copies the tenant tags off the
// response, because nothing else on the path puts them there.
// The code is the form's document type, not the questionnaire's id: every
// environment mints its own ids, and there is only one set of maps, so an id
// here would tie the tag to whichever environment stamped it.
// ── Provenance and tenancy ───────────────────────────────────────────────────
group SetResponseProvenance(source qr : QR, target r) {
  qr -> r.meta as m then {
    qr -> m.tag as t then {
      qr -> t.system = 'http://slade360edi.com/questionnaire-provenance' "provenanceSystem";
      qr -> t.code = 'paediatric-nutrition-assessment' "provenanceCode";
      qr -> t.display = 'Paediatric nutrition assessment form' "provenanceDisplay";
    } "provenanceTag";
  } "provenanceMeta";
  // Every tag the response carries, onto the resource. `meta` is 0..1, so this
  // lands on the same meta the rule above created rather than a second one.
  qr.meta as qm then {
    qm.tag as qt ->  r.meta as m,  m.tag = qt "copyTag";
  } "tenantTags";
}