A.6.1:4.9 - Keep description, representation, and publication separate

U.Mechanism is already an episteme. A second episteme that explains, summarizes, or compares it is a C.2.1 meta-description whose EntityOfConcernRef identifies the mechanism episteme. A diagram, equation set, program, or table is a representation governed by A.6.3 and A.6.3.RT when representation transition matters. An E.24.PUB publication occurrence makes one selected episteme edition available for its declared audience and use. A presentation carrier bears or renders the selected publication form under PublicationFormBearingRelation.

A grouping of several mechanism epistemes and realizations may be selected as a U.Structure or shown through a U.View when that structure or view is current. The grouping does not admit another root kind by itself.