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Version: v0.0.6

@cosyte/transform

Public entry point for @cosyte/transform - the HL7 v2 → FHIR R4 transformation library.

@cosyte/transform is not a parser; it is a consumer one tier above the parser suite. It takes already-parsed @cosyte/hl7 composites and produces validated @cosyte/fhir model nodes, grounded on the official HL7 Version 2 to FHIR Implementation Guide (hl7.fhir.uv.v2mappings, STU Edition 1). Its whole promise is narrow and honest: IG-grounded, fail-safe transformation with typed, value-free diagnostics - never a confident wrong FHIR value.

This module ships the six safety-critical datatype converters, the immutable OperationOutcome-shaped diagnostic channel and the NamingSystem resolver they consult, the message-level assembly - HL7 v2 ADT → FHIR Patient + Encounter, the ORU^R01 → DiagnosticReport + Observation results graph, the order-entry graph (ORM_O01 / OML_O21 → ServiceRequest and RXO → MedicationRequest), and the thin IG singles (VXU_V04 → Immunization, SIU_S12 → Appointment, MDM_T02 → DocumentReference), all through toFhir(msg) - and the terminology value-translation layer: a $translate-shaped toFhirCodeableConceptVia engine applying the license-clean IG value ConceptMaps to the previously structural-only coded fields (route/site, appointment type, order priority, substitution). Terminology depth beyond these maps, profiles, and the reverse FHIR → v2 direction are not implemented.

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