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# Provenance: heading_level_979

- No base model. LightGBM, trained from scratch.
- Weights (`model.json.gz`) sha256 `44e777b277a9230c4cfb7cb9109ef3ba016e955112526f1b7079002853d0d747`, equal to `weights_sha256` in the SDK 1.3.0 source (`scripts/extraction/learned/models/heading_level_979/manifest.json`, tag v1.3.0). The model is compiled into the SDK; it is not a `models-v1` asset.
- Documents: arXiv (CC BY 4.0, CC0 1.0), PubMed Central (CC BY), synthetic pages made by PDFluent. CC BY-SA excluded. Per-document licence, title, URL: `attribution.json`. PMC author names: `PMC-AUTHORS.json`.
- Split and counts: `manifest.json`. Leak check against the holdout registry: see `manifest.json` and `parity.json`.
- 17 PMC papers have source XML whose hash differs from the training manifest. Article identifiers match. Listed in `PROVENANCE-CHECK.json` (internal; not uploaded).
- Page copyright of third-party pages used as training pages is not cleared.