Copyright 2026 Axius SDC, Inc.

Licensed under the Apache License, Version 2.0.

src/sdc_gdr2omop/ddl/ holds the OMOP Common Data Model 5.4 DDL and primary keys for DuckDB, unmodified, from OHDSI's
CommonDataModel repository (https://github.com/OHDSI/CommonDataModel, tag v5.5.0, inst/ddl/5.4/duckdb), licensed
under the Apache License, Version 2.0 (as its DESCRIPTION states).

No OMOP vocabulary is distributed. The vocabularies come from Athena (https://athena.ohdsi.org) under their own terms;
the files under tests/vocabulary-made-up/ are made up for the tests and are not OMOP's.

The test fixtures under samples/ are the published packages of the NHANES Participant and NHANES Medication models of
the FAIR Data Demo (https://github.com/SemanticDataCharter/FAIR_Data_Demo, Apache 2.0) and a seeded sample of 200
records of each, generated by the demo from the CDC's public NHANES 2017-2018 release.
