The Semantics of Technical Graphics

Abstract

Common technical graphics terms table, graph, chart, and diagram share a parallel logical structure with the four common types of technical graphics that the terms typically refer to. In the system of terminology as in the system of graphics types, four logical categories result from the possible permutations of two features. The abstract semantic features which underlie the meanings of the terms are in this discussion labeled as [UNITS] and [PROPERTIES]; likewise the significant features which distinguish the graphics types are here labeled as “units” and “properties.” These proposed semantic features reflect a fundamental semantic relation common to all meaningful statements, the attribution of a property (a predicate) to an object (a subject). The connection between term-features ([UNITS] and [PROPERTIES]) and type-features (“units” and “properties”) is a variable but systematic sense-reference relation. Consequently the terminology used to refer to the various graphics types varies systematically according to the markedness relationships among the terms. Principled explanations of the best uses for each graphics type follow from the proposed logical relations between them.