G.12:9 — Relations

Builds on: C.21, C.16, C.2.1, A.2.6, C.29, E.24.PUB, and G.Core only for the active Part-G branches.

Coordinates with: G.6 and G.11 for relied-on evidence and refresh; A.19 and G.0 for comparison or aggregation; F.9 for actual distinct-local-sense use; F.18 for optional public names; G.5, C.18, C.19, G.8, G.10, and G.2 through the declared extensions.