Data Policy

Classifications

official — published by an authoritative public body when connected live or mapped from an official series.

third_party — non-official publishers.

uploaded — first-party uploads with provenance.

inferred — derived by declared formulas from other observations.

demonstration — fixture or curated demo content; never treated as current official national fact.

Missing data

Gaps are first-class. Duplios displays: No reliable public estimate available. when estimates cannot be calculated.

Versions and artifacts

Dataset versions and raw artifacts are append-only where registered.

Revisions link prior observations; history remains queryable.

Source approval

Unapproved sources do not auto-ingest.

Reviewers cannot approve or ingest sources.

Challenges

Use Contact → Evidence challenge or Data correction to report problems.