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Version: v0.1.6

src/fhir

@cosyte/synth/fhir: the FHIR R4 / US Core generation surface, exposed as its own subpath so importing the package root does not pull @cosyte/fhir. This is the lazy, per-format boundary: a consumer who only needs FHIR fixtures imports @cosyte/synth/fhir; one who needs only the core primitives never loads a parser. @cosyte/fhir is an optional peer dependency: present only for this subpath.

This subpath ships the US Core clinical set: Patient (base + US Core), Condition, Observation (US Core Laboratory Result + US Core Vital Signs), MedicationRequest, Encounter, DiagnosticReport (Laboratory), Immunization, AllergyIntolerance, Procedure, Provenance, plus the collection, transaction and document Bundle shapes (the last a Composition + the wired spine). Each is built through @cosyte/fhir's model constructors so it is spec-clean by construction, validating clean under @cosyte/fhir.validateResource and, against caller-supplied (BYO) US Core StructureDefinitions, conformant to US Core 6.1.0. Quirk generation is deferred.

A fixture can also be addressed by US Core 6.1.0 profile name rather than by generator name: generateUsCoreProfile resolves the requested profile against the adopted set before generating anything, and usCoreCoverage reports, for every profile the guide publishes, whether this build generates it. See ./coverage.js.

Interfaces​

BuildCompositionInput​

Inputs for buildComposition.

Properties​

date​

readonly date: string

The document date (YYYY-MM-DD).

organization​

readonly organization: string

The author + custodian reference (an in-bundle Organization fullUrl).

sections​

readonly sections: readonly CompositionSection[]

The document sections.

subject​

readonly subject: string

The subject reference (the patient's in-bundle fullUrl).

CodeConcept​

A coded concept: a system URI, a code, and its human-readable display.

Extended by​

Properties​

code​

readonly code: string

The code value (Coding.code).

display​

readonly display: string

The human-readable display text (Coding.display).

system​

readonly system: string

The code-system URI (Coding.system).

CompositionSection​

A document section: a LOINC section code, a human title, and the entry references it summarizes.

Properties​

code​

readonly code: string

The LOINC section code.

entries​

readonly entries: readonly string[]

In-bundle urn:uuid: references to the resources the section summarizes.

title​

readonly title: string

The section's human title / display.

FhirCorpusOptions​

Options for fhirCorpus.

Properties​

count?​

readonly optional count?: number

How many resources to generate. Defaults to 1.

mix?​

readonly optional mix?: readonly FhirResourceKind[]

The resource kinds to cycle through. Defaults to the full US Core clinical spine + a Bundle.

seed​

readonly seed: number

The seed for the whole corpus (deterministic).

FhirPatientIdentity​

A synthetic FHIR patient identity: every field drawn from ../safe.

Properties​

address​

readonly address: SyntheticAddress

Synthetic postal address (reserved non-real ZIP).

birthDate​

readonly birthDate: string

Date of birth as a FHIR date (YYYY-MM-DD) from the seeded generator.

email​

readonly email: string

Synthetic email at a reserved (example.*) domain.

gender​

readonly gender: "male" | "female"

FHIR administrative-gender code.

id​

readonly id: string

A synthetic resource id (a seeded UUID), never a real record key.

mrn​

readonly mrn: SyntheticIdentifier

Medical-record identifier scoped to the synthetic assigning authority.

person​

readonly person: SyntheticName

Name from the shipped fake-name pool.

phone​

readonly phone: string

Reserved 555-01xx phone number.

GenerateAllergyIntoleranceOptions​

Options for generateAllergyIntolerance.

Properties​

patient?​

readonly optional patient?: string

The patient reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateBundleOptions​

Options for generateBundle.

Properties​

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

type?​

readonly optional type?: FhirBundleType

The Bundle shape. Defaults to "collection".

GenerateConditionOptions​

Options for generateCondition.

Properties​

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

subject?​

readonly optional subject?: string

The subject reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateDiagnosticReportOptions​

Options for generateDiagnosticReport.

Properties​

results?​

readonly optional results?: readonly string[]

result references to the report's Observations (empty ⇒ omitted).

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

subject?​

readonly optional subject?: string

The subject reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateEncounterOptions​

Options for generateEncounter.

Properties​

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

subject?​

readonly optional subject?: string

The subject reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateImmunizationOptions​

Options for generateImmunization.

Properties​

patient?​

readonly optional patient?: string

The patient reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateMedicationRequestOptions​

Options for generateMedicationRequest.

Properties​

requester?​

readonly optional requester?: string

The requester reference. Defaults to a synthetic Practitioner reference.

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

subject?​

readonly optional subject?: string

The subject reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateObservationOptions​

Options for generateObservationLab / generateVitalSign.

Properties​

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

subject?​

readonly optional subject?: string

The subject reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GeneratePatientOptions​

Options for generatePatient.

Properties​

profile?​

readonly optional profile?: "base" | "us-core"

The profile posture. "base" (default) emits a spec-clean base-R4 Patient; "us-core" adds the US Core meta.profile and the race/ethnicity/birthsex must-support extensions (the required elements, identifier/name/gender, are always present).

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

GenerateProcedureOptions​

Options for generateProcedure.

Properties​

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

subject?​

readonly optional subject?: string

The subject reference (e.g. "Patient/syn-patient-1" or a urn:uuid: fullUrl).

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateProvenanceOptions​

Options for generateProvenance.

Properties​

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

target?​

readonly optional target?: string

The target reference this provenance is about (e.g. "Patient/syn-patient-1").

usCore?​

readonly optional usCore?: boolean

Whether to claim US Core via meta.profile. Defaults to true.

GenerateUsCoreProfileOptions​

Options for generateUsCoreProfile.

Properties​

profile​

readonly profile: "head-occipital-frontal-circumference-percentile" | "pediatric-bmi-for-age" | "pediatric-weight-for-height" | "us-core-allergyintolerance" | "us-core-blood-pressure" | "us-core-bmi" | "us-core-body-height" | "us-core-body-temperature" | "us-core-body-weight" | "us-core-careplan" | "us-core-careteam" | "us-core-condition-encounter-diagnosis" | "us-core-condition-problems-health-concerns" | "us-core-coverage" | "us-core-diagnosticreport-lab" | "us-core-diagnosticreport-note" | "us-core-documentreference" | "us-core-encounter" | "us-core-goal" | "us-core-head-circumference" | "us-core-heart-rate" | "us-core-immunization" | "us-core-implantable-device" | "us-core-location" | "us-core-medication" | "us-core-medicationdispense" | "us-core-medicationrequest" | "us-core-observation-clinical-result" | "us-core-observation-lab" | "us-core-observation-occupation" | "us-core-observation-pregnancyintent" | "us-core-observation-pregnancystatus" | "us-core-observation-screening-assessment" | "us-core-observation-sexual-orientation" | "us-core-organization" | "us-core-patient" | "us-core-practitioner" | "us-core-practitionerrole" | "us-core-procedure" | "us-core-provenance" | "us-core-pulse-oximetry" | "us-core-questionnaireresponse" | "us-core-relatedperson" | "us-core-respiratory-rate" | "us-core-servicerequest" | "us-core-simple-observation" | "us-core-smokingstatus" | "us-core-specimen" | "us-core-vital-signs"

The US Core 6.1.0 profile id to generate. Resolved against the adopted set before anything is generated; there is deliberately no default, so a blank or absent name refuses rather than falling through to some other profile's artifact.

seed?​

readonly optional seed?: number

The seed (deterministic). Defaults to 0.

QuantConcept​

A quantitative observation concept: a LOINC code plus the UCUM unit and a plausible synthetic value range the seeded generator draws within. The range implies no real measurement: it only keeps a generated result inside a structurally-sane band.

Extends​

Properties​

code​

readonly code: string

The code value (Coding.code).

Inherited from​

CodeConcept.code

decimals​

readonly decimals: number

Decimal places to render (keeps the emitted decimal lexical form stable and realistic).

display​

readonly display: string

The human-readable display text (Coding.display).

Inherited from​

CodeConcept.display

high​

readonly high: number

Inclusive upper bound of the synthetic value (in unit).

low​

readonly low: number

Inclusive lower bound of the synthetic value (in unit).

system​

readonly system: string

The code-system URI (Coding.system).

Inherited from​

CodeConcept.system

unit​

readonly unit: string

The UCUM unit code (Quantity.code and, as text, Quantity.unit).

RoundTripOptions​

Options for roundTrip.

Properties​

profiles?​

readonly optional profiles?: readonly StructureDefinition[]

US Core / vendor profiles (StructureDefinitions) to validate against. None is bundled: a caller supplies them (BYO), matching @cosyte/fhir's content-free posture.

RoundTripResult​

The verdict of one round-trip through @cosyte/fhir.

Properties​

byteStable​

readonly byteStable: boolean

Whether re-serializing the re-parsed resource is byte-identical to content.

content​

readonly content: string

The serialized FHIR JSON text (the parser's own conservative emit).

errors​

readonly errors: readonly string[]

The validation issue codes at error/fatal severity (empty ⇒ valid). information/warning findings (e.g. MUST_SUPPORT_ABSENT, INVARIANT_UNCHECKED, base dom-6) are advisory and are excluded here: they never make a resource invalid.

specClean​

readonly specClean: boolean

true iff the artifact is spec-clean: valid (zero errors) and byte-stable.

valid​

readonly valid: boolean

Whether @cosyte/fhir.validateResource reported no error/fatal findings.

warnings​

readonly warnings: readonly string[]

All non-informational issue codes (errors and warnings), for the Corpus artifact record.

UsCoreProfileCoverage​

One adopted US Core 6.1.0 resource profile, and whether this build generates a fixture for it.

Properties​

canonical​

readonly canonical: string

The profile's canonical URL: the value a generated artifact's meta.profile claims.

generated​

readonly generated: boolean

true when generateUsCoreProfile returns an artifact for this profile.

profile​

readonly profile: "head-occipital-frontal-circumference-percentile" | "pediatric-bmi-for-age" | "pediatric-weight-for-height" | "us-core-allergyintolerance" | "us-core-blood-pressure" | "us-core-bmi" | "us-core-body-height" | "us-core-body-temperature" | "us-core-body-weight" | "us-core-careplan" | "us-core-careteam" | "us-core-condition-encounter-diagnosis" | "us-core-condition-problems-health-concerns" | "us-core-coverage" | "us-core-diagnosticreport-lab" | "us-core-diagnosticreport-note" | "us-core-documentreference" | "us-core-encounter" | "us-core-goal" | "us-core-head-circumference" | "us-core-heart-rate" | "us-core-immunization" | "us-core-implantable-device" | "us-core-location" | "us-core-medication" | "us-core-medicationdispense" | "us-core-medicationrequest" | "us-core-observation-clinical-result" | "us-core-observation-lab" | "us-core-observation-occupation" | "us-core-observation-pregnancyintent" | "us-core-observation-pregnancystatus" | "us-core-observation-screening-assessment" | "us-core-observation-sexual-orientation" | "us-core-organization" | "us-core-patient" | "us-core-practitioner" | "us-core-practitionerrole" | "us-core-procedure" | "us-core-provenance" | "us-core-pulse-oximetry" | "us-core-questionnaireresponse" | "us-core-relatedperson" | "us-core-respiratory-rate" | "us-core-servicerequest" | "us-core-simple-observation" | "us-core-smokingstatus" | "us-core-specimen" | "us-core-vital-signs"

The profile id, as the guide's artifact index spells it.

Type Aliases​

FhirBundleType​

FhirBundleType = "collection" | "transaction" | "document"

The Bundle shapes @cosyte/synth supports.

FhirResourceKind​

FhirResourceKind = "Patient" | "USCorePatient" | "Condition" | "ObservationLab" | "VitalSign" | "MedicationRequest" | "Encounter" | "Immunization" | "AllergyIntolerance" | "Procedure" | "DiagnosticReport" | "Bundle" | "DocumentBundle"

A FHIR resource kind the fhirCorpus can generate.

Prop​

Prop = object

A named FHIR property ({ name, value }): the shape complex consumes.

Properties​

name​

readonly name: string

value​

readonly value: FhirNode

UsCoreProfileId​

UsCoreProfileId = typeof US_CORE_ADOPTED_PROFILES[number]

One profile id from the adopted US Core 6.1.0 set. Erased at run time, so it is resolved, not trusted.

UsCoreProfileUrl​

UsCoreProfileUrl = typeof US_CORE_PROFILE[keyof typeof US_CORE_PROFILE]

A US Core profile canonical URL.

Variables​

EXAMPLE_ALLERGENS​

const EXAMPLE_ALLERGENS: readonly CodeConcept[]

Allergen-substance example codes (for a US Core AllergyIntolerance.code). Public RxNorm / SNOMED CT identifiers used as structural fillers; no terminology content is bundled.

EXAMPLE_ALLERGY_MANIFESTATIONS​

const EXAMPLE_ALLERGY_MANIFESTATIONS: readonly CodeConcept[]

Allergy-reaction manifestation example codes (for AllergyIntolerance.reaction.manifestation). Public SNOMED CT clinical-finding identifiers used as structural fillers.

EXAMPLE_CONDITIONS​

const EXAMPLE_CONDITIONS: readonly CodeConcept[]

SNOMED CT problem/condition example codes (for a US Core Condition.code). Public SNOMED identifiers used as structural fillers; @cosyte/synth bundles no SNOMED content.

EXAMPLE_DIAGNOSTIC_REPORTS​

const EXAMPLE_DIAGNOSTIC_REPORTS: readonly CodeConcept[]

LOINC diagnostic-report example codes (for a US Core Laboratory DiagnosticReport.code). Public LOINC panel identifiers used as structural fillers.

EXAMPLE_ENCOUNTER_CLASSES​

const EXAMPLE_ENCOUNTER_CLASSES: readonly CodeConcept[]

HL7 v3 ActCode encounter-class example codes (for Encounter.class, a single Coding). Public ActCode identifiers used as structural fillers.

EXAMPLE_ENCOUNTER_TYPES​

const EXAMPLE_ENCOUNTER_TYPES: readonly CodeConcept[]

SNOMED CT encounter-type example codes (for a US Core Encounter.type). Public SNOMED identifiers used as structural fillers.

EXAMPLE_ETHNICITY_CATEGORIES​

const EXAMPLE_ETHNICITY_CATEGORIES: readonly CodeConcept[]

OMB ethnicity categories (US Core us-core-ethnicity ombCategory): the two OMB categories, public code facts from the CDC Race & Ethnicity code system.

EXAMPLE_LAB_OBSERVATIONS​

const EXAMPLE_LAB_OBSERVATIONS: readonly QuantConcept[]

LOINC laboratory-result example codes (for a US Core Laboratory Result Observation). Public LOINC identifiers used purely as illustrative structural fillers, with UCUM units and synthetic value bands.

EXAMPLE_MEDICATIONS​

const EXAMPLE_MEDICATIONS: readonly CodeConcept[]

RxNorm medication example codes (for a US Core MedicationRequest.medicationCodeableConcept). Public RxNorm identifiers used as structural fillers; @cosyte/synth bundles no RxNorm content.

EXAMPLE_PROCEDURES​

const EXAMPLE_PROCEDURES: readonly CodeConcept[]

SNOMED CT procedure example codes (for a US Core Procedure.code). Public SNOMED identifiers used as structural fillers, not CPT (which is never bundled).

EXAMPLE_RACE_CATEGORIES​

const EXAMPLE_RACE_CATEGORIES: readonly CodeConcept[]

OMB race categories (US Core us-core-race ombCategory): the five OMB categories, public code facts from the CDC Race & Ethnicity code system (urn:oid:2.16.840.1.113883.6.238).

EXAMPLE_VACCINES​

const EXAMPLE_VACCINES: readonly CodeConcept[]

CVX vaccine-administered example codes (for a US Core Immunization.vaccineCode). Public CDC CVX identifiers used as structural fillers; @cosyte/synth bundles no CVX content.

EXAMPLE_VITAL_SIGNS​

const EXAMPLE_VITAL_SIGNS: readonly QuantConcept[]

LOINC vital-sign example codes (for a US Core Vital Signs Observation). Public LOINC identifiers with their required UCUM units and synthetic value bands. Simple single-value vitals only: multi-component vitals (e.g. blood-pressure panel 85354-9) are not generated.

SYSTEM​

const SYSTEM: Readonly<{ ADMINISTRATIVE_GENDER: "http://hl7.org/fhir/administrative-gender"; ALLERGY_CLINICAL: "http://terminology.hl7.org/CodeSystem/allergyintolerance-clinical"; ALLERGY_VERIFICATION: "http://terminology.hl7.org/CodeSystem/allergyintolerance-verification"; CONDITION_CATEGORY: "http://terminology.hl7.org/CodeSystem/condition-category"; CONDITION_CLINICAL: "http://terminology.hl7.org/CodeSystem/condition-clinical"; CONDITION_VER_STATUS: "http://terminology.hl7.org/CodeSystem/condition-ver-status"; CVX: "http://hl7.org/fhir/sid/cvx"; DIAGNOSTIC_SERVICE_SECTION: "http://terminology.hl7.org/CodeSystem/v2-0074"; IDENTIFIER_TYPE: "http://terminology.hl7.org/CodeSystem/v2-0203"; LOINC: "http://loinc.org"; OBSERVATION_CATEGORY: "http://terminology.hl7.org/CodeSystem/observation-category"; OMB_RACE_ETHNICITY: "urn:oid:2.16.840.1.113883.6.238"; PROVENANCE_PARTICIPANT_TYPE: "http://terminology.hl7.org/CodeSystem/provenance-participant-type"; RXNORM: "http://www.nlm.nih.gov/research/umls/rxnorm"; SNOMED: "http://snomed.info/sct"; UCUM: "http://unitsofmeasure.org"; US_CORE_PROVENANCE_PARTICIPANT_TYPE: "http://hl7.org/fhir/us/core/CodeSystem/us-core-provenance-participant-type"; V3_ACT_CODE: "http://terminology.hl7.org/CodeSystem/v3-ActCode"; }>

The code-system system URIs the generators reference. Public identity URIs (HL7-published), never the code-system content, no SNOMED/LOINC/RxNorm table is bundled.

US_CORE_ADOPTED_PROFILES​

const US_CORE_ADOPTED_PROFILES: readonly ["head-occipital-frontal-circumference-percentile", "pediatric-bmi-for-age", "pediatric-weight-for-height", "us-core-allergyintolerance", "us-core-blood-pressure", "us-core-bmi", "us-core-body-height", "us-core-body-temperature", "us-core-body-weight", "us-core-careplan", "us-core-careteam", "us-core-condition-encounter-diagnosis", "us-core-condition-problems-health-concerns", "us-core-coverage", "us-core-diagnosticreport-lab", "us-core-diagnosticreport-note", "us-core-documentreference", "us-core-encounter", "us-core-goal", "us-core-head-circumference", "us-core-heart-rate", "us-core-immunization", "us-core-implantable-device", "us-core-location", "us-core-medication", "us-core-medicationdispense", "us-core-medicationrequest", "us-core-observation-clinical-result", "us-core-observation-lab", "us-core-observation-occupation", "us-core-observation-pregnancyintent", "us-core-observation-pregnancystatus", "us-core-observation-screening-assessment", "us-core-observation-sexual-orientation", "us-core-organization", "us-core-patient", "us-core-practitioner", "us-core-practitionerrole", "us-core-procedure", "us-core-provenance", "us-core-pulse-oximetry", "us-core-questionnaireresponse", "us-core-relatedperson", "us-core-respiratory-rate", "us-core-servicerequest", "us-core-simple-observation", "us-core-smokingstatus", "us-core-specimen", "us-core-vital-signs"]

The adopted set: the profile ids of every US Core 6.1.0 resource profile the implementation guide publishes, transcribed from the guide's own artifact index ("Structures: Resource Profiles"). This is the closed set a profile-addressed request is resolved against, and it is identifiers only, never IG content, exactly like US_CORE_PROFILE.

45 CFR 170.215 adopts FHIR R4.0.1 and US Core STU 6.1.0, so this is the profile set a developer building to 45 CFR 170.315(g)(10) addresses. It is not the count of StructureDefinition-us-core-*.json files in the guide's source tree: that directory also holds the guide's extension definitions and omits profiles the guide publishes.

The guide's 10 extension definitions (us-core-race, us-core-birthsex, …) are deliberately absent: an extension is not a standalone artifact, so a request naming one is refused like any other name outside this set.

Example​

import { US_CORE_ADOPTED_PROFILES } from "@cosyte/synth/fhir";
US_CORE_ADOPTED_PROFILES.includes("us-core-provenance"); // true

US_CORE_BIRTHSEX_EXTENSION​

const US_CORE_BIRTHSEX_EXTENSION: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-birthsex" = "http://hl7.org/fhir/us/core/StructureDefinition/us-core-birthsex"

The US Core us-core-birthsex extension URL (a Patient must-support extension).

US_CORE_ETHNICITY_EXTENSION​

const US_CORE_ETHNICITY_EXTENSION: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-ethnicity" = "http://hl7.org/fhir/us/core/StructureDefinition/us-core-ethnicity"

The US Core us-core-ethnicity extension URL (a Patient must-support extension).

US_CORE_PROFILE​

const US_CORE_PROFILE: Readonly<{ ALLERGY_INTOLERANCE: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-allergyintolerance"; CONDITION: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-condition-problems-health-concerns"; DIAGNOSTIC_REPORT_LAB: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-diagnosticreport-lab"; ENCOUNTER: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-encounter"; IMMUNIZATION: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-immunization"; MEDICATION_REQUEST: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-medicationrequest"; OBSERVATION_LAB: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-observation-lab"; PATIENT: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-patient"; PROCEDURE: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-procedure"; PROVENANCE: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-provenance"; VITAL_SIGNS: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-vital-signs"; }>

The canonical meta.profile URLs for the US Core 6.1.0 profiles @cosyte/synth generates.

US_CORE_PROFILE_BASE​

const US_CORE_PROFILE_BASE: "http://hl7.org/fhir/us/core/StructureDefinition/" = "http://hl7.org/fhir/us/core/StructureDefinition/"

The canonical prefix every US Core 6.1.0 resource profile's url shares. A profile's canonical is this prefix followed by its profile id.

Example​

import { US_CORE_PROFILE_BASE } from "@cosyte/synth/fhir";
`${US_CORE_PROFILE_BASE}us-core-provenance`;

US_CORE_RACE_EXTENSION​

const US_CORE_RACE_EXTENSION: "http://hl7.org/fhir/us/core/StructureDefinition/us-core-race" = "http://hl7.org/fhir/us/core/StructureDefinition/us-core-race"

The US Core us-core-race extension URL (a Patient must-support extension).

Functions​

bool()​

bool(value): FhirNode

A boolean primitive leaf.

Parameters​

value​

boolean

The boolean value.

Returns​

FhirNode

A primitive FhirNode.

Example​

import { bool } from "@cosyte/synth/fhir";
bool(true);

buildComposition()​

buildComposition(rng, input): FhirComplex

Build a spec-clean synthetic base-R4 Composition for a document Bundle, through @cosyte/fhir.

Parameters​

rng​

Rng

The seeded generator (for the resource id).

input​

BuildCompositionInput

Subject/organization references, date, and sections. See BuildCompositionInput.

Returns​

FhirComplex

The Composition resource model (a FhirComplex).

Example​

import { createRng } from "@cosyte/synth";
import { buildComposition } from "@cosyte/synth/fhir";
// buildComposition(createRng(1), { subject, organization, date: "2020-01-01", sections: [] });

codeableConcept()​

codeableConcept(concept): FhirComplex

A CodeableConcept wrapping a single Coding.

Parameters​

concept​

The coding's system, code, and display.

code​

string

display​

string

system​

string

Returns​

FhirComplex

A CodeableConcept FhirComplex.

Example​

import { codeableConcept } from "@cosyte/synth/fhir";
codeableConcept({ system: "http://snomed.info/sct", code: "59621000", display: "Essential hypertension" });

coding()​

coding(concept): FhirComplex

A single Coding element (system + code + display).

Parameters​

concept​

The coding's system, code, and display.

code​

string

display​

string

system​

string

Returns​

FhirComplex

A Coding FhirComplex.

Example​

import { coding } from "@cosyte/synth/fhir";
coding({ system: "http://loinc.org", code: "2345-7", display: "Glucose" });

dec()​

dec(raw): FhirNode

A decimal primitive leaf, precision-preserving via @cosyte/fhir's string-backed FhirDecimal.

Parameters​

raw​

string

The exact decimal lexical form (never routed through a JS number).

Returns​

FhirNode

A primitive FhirNode.

Example​

import { dec } from "@cosyte/synth/fhir";
dec("6.3");

fhirCorpus()​

fhirCorpus(options): Corpus

Build a reproducible Corpus of spec-clean FHIR resources across the supported kinds. Each resource is generated from a distinct sub-seed derived from the corpus seed and round-tripped through @cosyte/fhir; the per-artifact warnings record the validator's non-informational findings (empty ⇒ spec-clean, no US Core profiles supplied). Pass US Core StructureDefinitions to a per-resource roundTrip call to additionally assert profile conformance (BYO, none is bundled).

Parameters​

options​

FhirCorpusOptions

Seed, count, and the resource mix. See FhirCorpusOptions.

Returns​

Corpus

A deep-frozen Corpus.

Example​

import { fhirCorpus } from "@cosyte/synth/fhir";
const corpus = fhirCorpus({ seed: 42, count: 6 });
corpus.artifacts.every((a) => a.warnings.length === 0); // spec-clean (structural)

fhirPatientIdentity()​

fhirPatientIdentity(rng): FhirPatientIdentity

Mint a complete synthetic FhirPatientIdentity. Every value comes from a synthetic-safety provider, no code path here can return a real or plausibly-real identifier. The draw order is fixed (id → name → MRN → DOB → gender → address → phone → email) so the same seed yields the same identity.

Parameters​

rng​

Rng

The seeded generator.

Returns​

FhirPatientIdentity

A synthetic FhirPatientIdentity.

Example​

import { createRng } from "@cosyte/synth";
// const id = fhirPatientIdentity(createRng(1)); // id.person, id.mrn, …

generateAllergyIntolerance()​

generateAllergyIntolerance(options?): FhirComplex

Generate a spec-clean synthetic US Core AllergyIntolerance, built through @cosyte/fhir.

Parameters​

options?​

GenerateAllergyIntoleranceOptions = {}

Seed, patient reference, and US Core posture. See GenerateAllergyIntoleranceOptions.

Returns​

FhirComplex

The AllergyIntolerance resource model (a FhirComplex).

Example​

import { generateAllergyIntolerance } from "@cosyte/synth/fhir";
const allergy = generateAllergyIntolerance({ seed: 15, patient: "Patient/syn-patient-1" });

generateBundle()​

generateBundle(options?): FhirComplex

Generate a spec-clean synthetic FHIR Bundle (collection, transaction, or document) built through @cosyte/fhir, containing a US Core Patient and its full clinical spine wired by urn:uuid: references so every reference resolves in-bundle.

Parameters​

options?​

GenerateBundleOptions = {}

Seed and Bundle shape. See GenerateBundleOptions.

Returns​

FhirComplex

The Bundle resource model (a FhirComplex).

Example​

import { generateBundle } from "@cosyte/synth/fhir";
const bundle = generateBundle({ seed: 42, type: "document" });

generateCondition()​

generateCondition(options?): FhirComplex

Generate a spec-clean synthetic US Core Condition (problem-list item), built through @cosyte/fhir.

Parameters​

options?​

GenerateConditionOptions = {}

Seed, subject reference, and US Core posture. See GenerateConditionOptions.

Returns​

FhirComplex

The Condition resource model (a FhirComplex).

Example​

import { generateCondition } from "@cosyte/synth/fhir";
const condition = generateCondition({ seed: 7, subject: "Patient/syn-patient-1" });

generateDiagnosticReport()​

generateDiagnosticReport(options?): FhirComplex

Generate a spec-clean synthetic US Core Laboratory DiagnosticReport, built through @cosyte/fhir.

Parameters​

options?​

GenerateDiagnosticReportOptions = {}

Seed, subject, result references, US Core posture. See GenerateDiagnosticReportOptions.

Returns​

FhirComplex

The DiagnosticReport resource model (a FhirComplex).

Example​

import { generateDiagnosticReport } from "@cosyte/synth/fhir";
const report = generateDiagnosticReport({ seed: 19, subject: "Patient/syn-patient-1" });

generateEncounter()​

generateEncounter(options?): FhirComplex

Generate a spec-clean synthetic US Core Encounter, built through @cosyte/fhir.

Parameters​

options?​

GenerateEncounterOptions = {}

Seed, subject reference, and US Core posture. See GenerateEncounterOptions.

Returns​

FhirComplex

The Encounter resource model (a FhirComplex).

Example​

import { generateEncounter } from "@cosyte/synth/fhir";
const encounter = generateEncounter({ seed: 11, subject: "Patient/syn-patient-1" });

generateImmunization()​

generateImmunization(options?): FhirComplex

Generate a spec-clean synthetic US Core Immunization, built through @cosyte/fhir.

Parameters​

options?​

GenerateImmunizationOptions = {}

Seed, patient reference, and US Core posture. See GenerateImmunizationOptions.

Returns​

FhirComplex

The Immunization resource model (a FhirComplex).

Example​

import { generateImmunization } from "@cosyte/synth/fhir";
const imm = generateImmunization({ seed: 13, patient: "Patient/syn-patient-1" });

generateMedicationRequest()​

generateMedicationRequest(options?): FhirComplex

Generate a spec-clean synthetic US Core MedicationRequest, built through @cosyte/fhir.

Parameters​

options?​

GenerateMedicationRequestOptions = {}

Seed, subject/requester references, US Core posture.

Returns​

FhirComplex

The MedicationRequest resource model (a FhirComplex).

Example​

import { generateMedicationRequest } from "@cosyte/synth/fhir";
const mr = generateMedicationRequest({ seed: 9, subject: "Patient/syn-patient-1" });

generateObservationLab()​

generateObservationLab(options?): FhirComplex

Generate a spec-clean synthetic US Core Laboratory Result Observation.

Parameters​

options?​

GenerateObservationOptions = {}

Seed, subject reference, US Core posture. See GenerateObservationOptions.

Returns​

FhirComplex

The Observation resource model (a FhirComplex).

Example​

import { generateObservationLab } from "@cosyte/synth/fhir";
const obs = generateObservationLab({ seed: 3, subject: "Patient/syn-patient-1" });

generatePatient()​

generatePatient(options?): FhirComplex

Generate a spec-clean synthetic FHIR R4 Patient (base or US Core), built through @cosyte/fhir.

Parameters​

options?​

GeneratePatientOptions = {}

Seed and profile posture. See GeneratePatientOptions.

Returns​

FhirComplex

The Patient resource model (a FhirComplex).

Example​

import { generatePatient } from "@cosyte/synth/fhir";
import { serializeResource } from "@cosyte/fhir";
const patient = generatePatient({ seed: 42, profile: "us-core" });
serializeResource(patient);

generateProcedure()​

generateProcedure(options?): FhirComplex

Generate a spec-clean synthetic US Core Procedure, built through @cosyte/fhir.

Parameters​

options?​

GenerateProcedureOptions = {}

Seed, subject reference, and US Core posture. See GenerateProcedureOptions.

Returns​

FhirComplex

The Procedure resource model (a FhirComplex).

Example​

import { generateProcedure } from "@cosyte/synth/fhir";
const procedure = generateProcedure({ seed: 17, subject: "Patient/syn-patient-1" });

generateProvenance()​

generateProvenance(options?): FhirComplex

Generate a spec-clean synthetic US Core Provenance, built through @cosyte/fhir.

Parameters​

options?​

GenerateProvenanceOptions = {}

Seed, target reference, and US Core posture. See GenerateProvenanceOptions.

Returns​

FhirComplex

The Provenance resource model (a FhirComplex).

Example​

import { generateProvenance } from "@cosyte/synth/fhir";
const provenance = generateProvenance({ seed: 19, target: "Patient/syn-patient-1" });

generateUsCoreProfile()​

generateUsCoreProfile(options): FhirComplex

Generate a fixture by US Core 6.1.0 profile name, or fail closed before anything is generated.

Parameters​

options​

GenerateUsCoreProfileOptions

The profile name and seed. See GenerateUsCoreProfileOptions.

Returns​

FhirComplex

The resource model (a FhirComplex) claiming that profile in meta.profile.

Throws​

SynthError SYNTH_UNSUPPORTED_KIND when the name is not in the adopted set.

Throws​

SynthError SYNTH_PROFILE_NOT_GENERATED when the profile is adopted and not generated here.

Example​

import { generateUsCoreProfile } from "@cosyte/synth/fhir";
const provenance = generateUsCoreProfile({ profile: "us-core-provenance", seed: 42 });

generateVitalSign()​

generateVitalSign(options?): FhirComplex

Generate a spec-clean synthetic US Core Vital Signs Observation (a single-value vital such as heart rate or body weight; effectiveDateTime is required by the vital-signs profile).

Parameters​

options?​

GenerateObservationOptions = {}

Seed, subject reference, US Core posture. See GenerateObservationOptions.

Returns​

FhirComplex

The Observation resource model (a FhirComplex).

Example​

import { generateVitalSign } from "@cosyte/synth/fhir";
const vs = generateVitalSign({ seed: 5, subject: "Patient/syn-patient-1" });

meta()​

meta(profiles): FhirComplex

A meta.profile element pinning the resource to one or more canonical profile URLs (US Core conformance is claimed via meta.profile). No version is pinned, so validating against any supplied version of the named profile never raises a version-mismatch.

Parameters​

profiles​

readonly string[]

The canonical profile URLs to claim.

Returns​

FhirComplex

A meta FhirComplex.

Example​

import { meta, US_CORE_PROFILE } from "@cosyte/synth/fhir";
meta([US_CORE_PROFILE.PATIENT]);

mrnIdentifier()​

mrnIdentifier(mrn): FhirComplex

The US Core Patient identifier element for a synthetic MRN: type (MR), the synthetic assigning-authority OID as system, and the synthetic value. Satisfies US Core Patient's required identifier.system + identifier.value.

Parameters​

mrn​

SyntheticIdentifier

The synthetic identifier from safe.identifier.

Returns​

FhirComplex

An Identifier FhirComplex.

Example​

import { createRng, safe } from "@cosyte/synth";
import { mrnIdentifier } from "@cosyte/synth/fhir";
mrnIdentifier(safe.identifier(createRng(1), "MR"));

narrative()​

narrative(text): FhirComplex

A generated Narrative (text) with status: "generated" and an XHTML div carrying only synthetic text, satisfies the base dom-6 best-practice constraint so a generated resource is robust as well as valid. The div is XHTML-namespaced and carries no markup beyond a paragraph, so it round-trips byte-for-byte through @cosyte/fhir's codec.

Parameters​

text​

string

The plain synthetic summary text (no PHI: it is composed from synthetic values).

Returns​

FhirComplex

A Narrative FhirComplex.

Example​

import { narrative } from "@cosyte/synth/fhir";
narrative("Synthetic patient summary.");

prop()​

prop(name, value): Prop

Build a named FHIR property.

Parameters​

name​

string

The property name.

value​

FhirNode

The property's node value.

Returns​

Prop

A Prop.

Example​

import { prop, str } from "@cosyte/synth/fhir";
prop("gender", str("female"));

reference()​

reference(ref): FhirComplex

A literal Reference element ({ reference: "<Type>/<id>" } or a urn:uuid: fullUrl).

Parameters​

ref​

string

The reference string.

Returns​

FhirComplex

A Reference FhirComplex.

Example​

import { reference } from "@cosyte/synth/fhir";
reference("Patient/syn-patient-1");

roundTrip()​

roundTrip(resource, options?): RoundTripResult

Round-trip a generated FHIR resource through serialize → parse → validate → serialize and report the verdict. A spec-clean artifact validates with zero errors and re-serializes byte-identically.

Parameters​

resource​

FhirComplex

The resource model to check (typically from a generate* function).

options?​

RoundTripOptions = {}

Optional US Core / vendor profiles to validate against. See RoundTripOptions.

Returns​

RoundTripResult

The RoundTripResult.

Example​

import { generatePatient, roundTrip } from "@cosyte/synth/fhir";
const { specClean, errors } = roundTrip(generatePatient({ seed: 1 }));
// specClean === true, errors.length === 0

str()​

str(value): FhirNode

A string/code/uri/date primitive leaf.

Parameters​

value​

string

The lexical string value.

Returns​

FhirNode

A primitive FhirNode.

Example​

import { str } from "@cosyte/synth/fhir";
str("final");

toFhirDate()​

toFhirDate(ymd): string

Reformat a YYYYMMDD synthetic date (from safe.dateYmd) as a FHIR date (YYYY-MM-DD).

Parameters​

ymd​

string

The YYYYMMDD date string.

Returns​

string

The YYYY-MM-DD FHIR date string.

Example​

import { toFhirDate } from "@cosyte/synth/fhir";
toFhirDate("19700131"); // "1970-01-31"

usCoreCoverage()​

usCoreCoverage(): readonly UsCoreProfileCoverage[]

Report this build's US Core 6.1.0 coverage: one entry per adopted resource profile, in the guide's own order, each carrying its canonical URL and whether this build generates it.

The report is exhaustive over the adopted set by construction, so a profile the guide publishes and this build does not generate is named here rather than being indistinguishable from a typo.

Returns​

readonly UsCoreProfileCoverage[]

One frozen UsCoreProfileCoverage entry per adopted profile.

Example​

import { usCoreCoverage } from "@cosyte/synth/fhir";
usCoreCoverage().filter((entry) => !entry.generated).map((entry) => entry.profile);