# Data sources and redistribution boundary

`moonbit-icd` intentionally separates software behavior from jurisdictional
coding data.

## Bundled material

The repository includes the ICD-10 chapter range structure and a
hand-authored representative catalog. The records exercise parsing, prefix and
title search, hierarchy, exclusions, batch validation, and benchmark behavior.
They are fixtures for software tests; they are not a complete WHO, ICD-10-CM,
or national release and must not be presented as clinical coding guidance.

## Production data

Applications should import an authorized table for their jurisdiction and
version. Before redistributing such a table, confirm the provider's license,
attribution, update policy, and whether derivative indexes are permitted. Keep
those facts beside the imported data rather than silently baking them into this
library.

The CSV/TSV reader accepts the six-column schema emitted by
`export_entries`: `code`, `title`, `chapter_id`, `parent`, `excludes`, and
`note`. It validates syntax and references but cannot grant permission to use
the source data.

## External references

- ICD-10 and ICD-11 are maintained by the World Health Organization:
  <https://www.who.int/standards/classifications/classification-of-diseases>
- ICD-10-CM is jurisdiction-specific and maintained in the United States by
  NCHS/CMS: <https://www.cdc.gov/nchs/icd/>

Repository source code is Apache-2.0. External references and any future
application-provided data remain subject to their own terms.