(=> (Dyad-Of-Dimensions ?Physim ?Spatdim ?Class)
(And (Physical-Dimension ?Physim)
(Positive-Integer ?Spatdim)
(= ?Class
(Kappa (?Vq)
(And (Dyad ?Vq)
(= (Spatial.Dimension ?Vq) ?Spatdim)
(= (Quantity.Dimension ?Vq) ?Physim))))))