Provenance
Every material claim points to an identified source, an as-of date and an evidence class. Different figures stay attached to their own methods.
How a claim is labeled
Observed
Stated directly in an identified source.
Corroborated
Supported by more than one independent source.
Derived
Calculated from sourced values by a stated method.
Inferred
A reasoned reading. It may be wrong and is labeled as such.
The canonical records
Evidence
An item from an identified source, as retrieved.
Entity
A person, organization, asset, place or thing with a stable identity.
Event
Something that happened, with its time and participants.
Claim
A statement tied to evidence, scope, class and date.
Decision
A choice, its options, its owner and its reasoning.
Action
Work done because of a decision.
Outcome
What resulted, measured against what was expected.
Policy
A rule that governs use, review or access.
Review
A named check of a record, with its result and date.
Correction
A record that supersedes another and never erases it.