The core of the matter lies in the way that centers are being formed. The point of all living processes is that the next bit of structure which is injected to transform the existing wholeness must always extend and enhance the wholeness by creating further positive living centers. This Process of enhancing wholeness is a process which is, if you like, a kind of universal Template for all life-creating processes. (Alexander, The Nature of Order : An Essay on the Art of Building and the Nature of the Universe, p. 4)
A Template page provides items as a guide for new pages intended to follow a prepared format.
To complete an operational description of round- and Square-Brackets, we will need an axiom that specifies how the two boundaries interact in configurations more complex than the double nesting of Inversion. Here is the James axiom of Arrangement. The axiom specifies an invariant structure across frames.
> The frame-type is Structure between round- and Square-Brackets. The generic template collapses if either the type or the content is void-equivalent. There are categories of frames that all have the same frame-type. In Arrangement collect gathers together framed-content that has in common the same frame-type. (p. 198)
DOT FROM two-level-diagram