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# Bartek source ingestion plan

Prepared from source-expansion work by **Bart Kobyliński** for Biblioteka Nauki
and Europeana.

## Decision

Accept the two extra columns in the main parquet schema:

`id, text, source, added, created, token_count, license, author`

Reason: `license` and `author` are document-level provenance fields. Keeping them
inside the parquet means they survive shuffling, filtering, deduplication, and
training-mix extraction. A separate sidecar file is useful for audit exports, but
it should not be the only place where rights metadata lives.

## Contract for the PR

Bartek should provide:

- normalized parquet/jsonl.zst files for `biblioteka_nauki` and `europeana`, or
  a script that regenerates them from the upstream services;
- per-record `license` and `author` fields where upstream metadata exists;
- per-source stats: documents, characters, token count, license distribution,
  author coverage, dropped-record counts;
- enough source notes to reproduce the exact upstream query/API/interface and the
  license decision logic.

The project-side scripts now support the expanded schema and will regenerate:

- per-source datasheets in `data/<source>/<source>.md`;
- the README source table and totals;
- the changelog source list.

## Source policy

### Biblioteka Nauki

Include as `biblioteka_nauki` only through the direct upstream rebuild. Do not
treat the old SpeakLeash aggregate as sufficient evidence. Each record should
carry its upstream license and author/creator metadata when available.

Suggested source description:

Biblioteka Nauki is a Polish academic-text source fetched directly from the
upstream site/interface. Records are accepted only when a reusable license is
available in the upstream metadata. Per-document license and author metadata are
preserved in the corpus.

### Europeana

Include as `europeana` only through the direct upstream rebuild preserving
per-record rights statements. The raw SpeakLeash aggregate remains excluded
because it is mixed-rights and insufficiently traceable.

Release split:

- `created/published < 1929`: conservative public release slice for US-sensitive
  downstream users;
- `created/published >= 1929` or unknown date: keep separately labeled, or hold
  until legal review confirms the release scope.

Dataset-card wording should say that Europeana rights statements are evaluated
primarily for Poland/EU and that public-domain status can depend on jurisdiction.

## Checklist before merge

- Run the source rebuild or ingest script.
- Validate parquet schema has the eight canonical columns.
- Recompute token counts and stats from the generated files.
- Run `python3 src/make_docs.py`.
- Inspect the README totals and source datasheets.
- Confirm Europeana is either split at 1929 or explicitly marked as
  jurisdiction-sensitive.
- Keep raw SpeakLeash Europeana excluded unless per-record rights metadata is
  preserved.