BUSBuilding Understanding Standard
Vocabularies

Two closed vocabularies

Both are normative, both are published as JSON, and both are generated into these pages from the same files the specification ships.

Unit codes

77 codes written the way engineers write them — degF, cfm, gpm, inH2O, tonRef — with informative mappings to external systems.

bus-units.json · 77 codes

Symbol roles

52 roots, 75 leaves. Hierarchical dotted paths so an unfamiliar role degrades to its parent instead of vanishing.

bus-symbol-roles.json · 52 roots