# Rights ledger — sleep discovery sample

| Item | Basis | Scope and limitation |
|---|---|---|
| Crossref factual bibliographic metadata | [Crossref retrieval documentation, licensing section](https://www.crossref.org/documentation/retrieve-metadata/), reviewed by project architect 2026-10-11 | Retained DOI, titles, author names, journal names, publisher, registered article type and publication dates. Crossref states bibliographic metadata facts are freely reusable. |
| Compilation and added retrieval provenance | PRANASARA Intelligence Lab CC0-1.0 dedication | Applies to the generated compilation, stable identifiers and query/retrieval provenance. It does not expand rights in third-party content. |
| Linked articles and other content | No rights asserted or acquired | Abstracts, full text, figures, references, affiliations and emails are excluded. Resolving a DOI does not confer reuse permission for the target content. |

Crossref records can contain content under different licenses. The fetcher uses an explicit field allowlist and discards all other source fields. This is a bibliographic discovery sample, not a license-cleared article-text corpus. Query membership is retrieval provenance, not clinical review or a verified topic label.

CC0-1.0 reference: https://creativecommons.org/publicdomain/zero/1.0/

Account publication is separate from collection; these local artifacts do not establish that a public Hugging Face or GitHub dataset exists.