Datasets:
Data governance and rights protocol
Scope
This policy governs text used for tokenizer training, language-model pretraining, validation, and public dataset artifacts. It distinguishes public access from permission. A downloadable page or dataset does not enter the allowlist unless the intended copying, transformation, model training, and release are supported by document-level evidence.
This document is an engineering control, not a substitute for legal advice. Public corpus or weight release requires final legal review.
Fail-closed decision
A document is admissible only when all required conditions pass:
- source identity and canonical URL are known;
- a source revision or immutable snapshot is recorded;
- rights evidence is retrievable and archived by hash;
- commercial use and derivatives are allowed;
- redistribution of the released artifact is allowed;
- attribution and share-alike duties can be satisfied;
- third-party inclusions are absent or separately cleared;
- personal-data scanning and source-specific review pass;
- the document is outside takedown and quarantine lists;
- benchmark contamination remains below the frozen threshold.
Unknown, missing, noncommercial, or no-derivatives terms cause rejection. A human may quarantine a record for review but cannot silently override the release policy.
Initial approved source families
Portuguese Wikimedia projects
Acquire official, dated Wikimedia dumps. Text may be used under the applicable CC BY-SA terms while preserving article URL, title, revision, contributors or attribution mechanism, license URI, and change notice. Exclude images, fair-use media, and content with specific incompatible notices. Classify Brazilian and European Portuguese rather than treating every Portuguese page as pt-BR.
Rights evidence:
- https://foundation.wikimedia.org/wiki/Policy:Terms_of_Use
- https://dumps.wikimedia.org/legal.html
- https://dumps.wikimedia.org/ptwiki/
Portal da OBMEP
The Portal states CC BY 3.0 Brazil coverage for its material. Accept only Portal/IMPA-authored textual items whose page and embedded assets are covered by that statement. Preserve author or IMPA attribution, URL, license, and modification notice. Exclude reproduced book excerpts, external examinations, third-party figures, and material outside the Portal domain until separately cleared.
Rights evidence:
Brazilian official acts
Article 8(IV) of Law 9,610/1998 excludes official acts such as laws, decrees, regulations, and judicial decisions from copyright protection. The project initially limits this family to laws, decrees, regulations, and Section 1 of the Official Gazette. Record issuing body, act number, publication date, edition, section, page, canonical URL, and snapshot hash.
This is a statutory rights basis, not a Creative Commons license. Editorial articles, news, speeches, doctrine, visual design, and third-party attachments are not automatically covered. Gazette sections with personal data remain excluded pending LGPD review.
Evidence:
- https://www.planalto.gov.br/ccivil_03/leis/l9610.htm
- https://www.gov.br/imprensanacional/pt-br/acesso-a-informacao/dados-abertos
ProEdu
Evaluate every ProEdu item and file. Admit CC0, exact CC BY, and exact CC BY-SA licenses. Reject noncommercial, no-derivatives, missing-version, or missing- license records. Verify that attachments and included third-party works carry compatible rights.
Evidence:
SciELO Brasil
Admit only articles whose authoritative article record displays an exact CC BY 4.0 license. Preserve authors, title, journal, DOI, license URI, publication date, and change notice. Exclude older or ambiguous items, CC BY-NC works, and third-party figures not covered by the article license.
Rejected aggregate sources
The main corpus does not ingest these collections as wholes:
| Source | Reason |
|---|---|
| BrWaC | academic-use restrictions and no uniform redistribution grant for underlying pages |
| Carolina | conflicting aggregate terms and source-specific document licenses, including noncommercial terms |
| CulturaX | package terms do not relicense mC4 and OSCAR web text |
| mC4/C4 | dataset packaging terms do not establish rights for every source page |
| OSCAR | corpus maintainers do not own the crawled content |
| HPLT | release terms do not provide a homogeneous rights chain for underlying pages |
| Common Crawl | users remain responsible for copyright, privacy, and origin-site terms |
| GigaVerbo and GigaVerbo-v2 | mixed sources with incompatible, unknown, or restricted terms |
| LegalPT aggregates | official acts are mixed with news, scholarship, and web-derived text |
| generic gov.br pages | public hosting and site footers do not classify every page as an official act |
A rejected aggregate can serve as a discovery index. A document must be reacquired from its original source and pass the full policy before admission.
Document contract
Every publishable document records:
- document ID and stable group ID;
- normalized-text and raw-content SHA-256;
- canonical and acquisition URLs;
- creator, publisher or issuing body, and title;
- publication and retrieval times;
- source revision and snapshot hash;
- language and language variant;
- domain and split;
- rights basis and exact SPDX license where applicable;
- license and evidence URLs plus evidence retrieval time and digest;
- attribution text and share-alike status;
- commercial-use, derivatives, and redistribution decisions;
- third-party content status;
- PII review state;
- ordered transformation chain;
- parent document ID for derived segments;
- takedown state and review history.
Document IDs derive from stable source identity and revision, not from row position. Split assignment uses the group ID to prevent related versions from crossing evaluation boundaries.
Transformation record
Each transformation includes a name, semantic version, parameters, input hash, output hash, timestamp, and code commit. Normalization is lossless NFC plus documented control-character and whitespace handling. Material editorial changes are not hidden inside normalization.
Exact duplicate removal operates on normalized hashes. Near-duplicate removal and benchmark decontamination emit match evidence and quarantine decisions. Original raw snapshots remain immutable in the controlled artifact store when their rights permit retention.
License-separated release
Corpus shards are separated by rights family. Every record retains its own license. A mixed dataset card lists all included rights families and does not apply Apache-2.0 to source text.
Share-alike obligations are evaluated at the released corpus-artifact layer before publication. Model-weight licensing is a separate legal decision and is not inferred from the code or dataset package.
Personal data and takedown
The project minimizes personal data rather than claiming that automated PII detection is complete. High-risk sources, children's information, personal identifiers, contact details, and Gazette personnel sections are excluded from the initial corpus.
Every release has a documented removal channel and immutable takedown ledger. A removal creates a new corpus revision, records affected document and token shards, and triggers an impact review for future model releases. Historical research manifests remain available only when lawful and appropriately restricted.
Required reports
Each corpus build emits machine-readable reports for:
- source and license decisions;
- evidence coverage;
- acquisition hashes;
- encoding and language distribution;
- PII and policy quarantines;
- exact and near duplicates;
- benchmark overlap;
- split and domain distribution;
- license-family bytes and tokens;
- transformation lineage coverage;
- rejected and removed records.
A later quality gate cannot downgrade an earlier legal failure into a warning.