Prepare 0.4.0: DGDA Drug and LOINC Integration

input/fsh/examples/BDMedicationExample.fsh

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+Instance: BDMedicationExample
+InstanceOf: BDMedication
+Title: "Medication Example — Marvelous Fe (Combination Drug)"
+Description: """
+Example BDMedication instance for Marvelous Fe, a combination drug containing
+ferrous sulphate and folic acid. Demonstrates multi-ingredient handling with
+ICD-11 MMS substance codes populated from OCL Has-active-ingredient mappings.
+Dose form coded using EDQM Standard Terms.
+"""
+Usage: #example
+
+* code.coding[0].system = "https://dgda.gov.bd/drug-registry"
+* code.coding[0].code = #353-0026-039--marvelous-fe
+* code.coding[0].display = "Marvelous Fe"
+* code.text = "Marvelous Fe"
+
+* form.coding[0].system = "http://standardterms.edqm.eu"
+* form.coding[0].code = #10219000
+* form.coding[0].display = "Tablet"
+
+// Ingredient 1: Ferrous Sulphate → ICD-11 XM substance code
+* ingredient[0].itemCodeableConcept.coding[0].system = "http://id.who.int/icd/release/11/mms"
+* ingredient[0].itemCodeableConcept.coding[0].code = #XM3SQ1
+* ingredient[0].itemCodeableConcept.coding[0].display = "Ferrous sulphate"
+* ingredient[0].itemCodeableConcept.text = "Ferrous sulphate"
+* ingredient[0].isActive = true
+
+// Ingredient 2: Folic Acid → ICD-11 XM substance code
+* ingredient[1].itemCodeableConcept.coding[0].system = "http://id.who.int/icd/release/11/mms"
+* ingredient[1].itemCodeableConcept.coding[0].code = #XM7R82
+* ingredient[1].itemCodeableConcept.coding[0].display = "Folic acid"
+* ingredient[1].itemCodeableConcept.text = "Folic acid"
+* ingredient[1].isActive = true

input/fsh/examples/BDMedicationRequestExample.fsh

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+Instance: BDMedicationRequestExample
+InstanceOf: BDMedicationRequest
+Title: "Medication Request Example — Marvelous Fe Prescription"
+Description: """
+Example BDMedicationRequest instance prescribing Marvelous Fe. Demonstrates
+the full prescription chain: BDMedicationRequest → BDMedication → DGDA code
+→ ICD-11 substance ingredients. Route of administration coded using HL7 v3
+RouteOfAdministration.
+"""
+Usage: #example
+
+* identifier[0].system = "https://fhir.dghs.gov.bd/identifier/prescription"
+* identifier[0].value = "RX-2024-BD-000001"
+
+* status = #active
+* intent = #order
+
+* medicationReference = Reference(BDMedicationExample)
+
+* subject = Reference(BDPatientExample)
+* subject.display = "Example Patient"
+
+* encounter = Reference(BDEncounterExample)
+* encounter.display = "Example Outpatient Encounter"
+
+* authoredOn = "2024-11-01T10:30:00+06:00"
+
+* requester = Reference(BDPractitionerExample)
+* requester.display = "Example Practitioner"
+
+* dosageInstruction[0].text = "Take 1 tablet daily after meals"
+* dosageInstruction[0].timing.repeat.frequency = 1
+* dosageInstruction[0].timing.repeat.period = 1
+* dosageInstruction[0].timing.repeat.periodUnit = #d
+* dosageInstruction[0].route.coding[0].system = "http://terminology.hl7.org/CodeSystem/v3-RouteOfAdministration"
+* dosageInstruction[0].route.coding[0].code = #PO
+* dosageInstruction[0].route.coding[0].display = "Swallow, oral"
+* dosageInstruction[0].doseAndRate[0].doseQuantity.value = 1
+* dosageInstruction[0].doseAndRate[0].doseQuantity.unit = "tablet"
+* dosageInstruction[0].doseAndRate[0].doseQuantity.system = "http://unitsofmeasure.org"
+* dosageInstruction[0].doseAndRate[0].doseQuantity.code = #{tbl}