Coverage, enrichment and clocks

Coverage uses the release’s declared match census. An absent assessment remains in the denominator. Unknown, missing, partial and not applicable are different states; none should be converted to a false boolean or a numeric zero.

Read global coverage for a named release and per-match coverage before choosing a family. Report discipline, season, family, grain and definition version with each percentage. Do not add percentages or substitute historical inventory percentages for a newly measured release.

Enrichment semantics

Enrichment density uses accepted canonical points as its denominator, not a known true complete-match length. Some releases do not project an enrichment family; the capability metadata distinguishes that case from a projected but missing family.

Time evidence

Preserve kind, role, anchor, alignment, confidence and quality. An observed instant is not interchangeable with a received clock, estimated event or relative elapsed duration. Relative zero is valid. Unknown anchors stay unknown. Conflicting and nonmonotonic evidence remains visible rather than being silently collapsed into a fabricated precise clock.

Do not derive actual match start by subtracting a duration from an end clock unless an explicitly supported definition establishes that calculation. Unknown calendar dates are independent from availability of point clocks.