The CAD-based system does not encourage the use of structure-preserving transformations. It does not encourage the creation of living centers.

Entities in the same semantic neighborhood but without a typed relation to this one — candidates for new edges or unrecognized duplicates.

• Living structure can only be created by structure-preserving transformations.claim0.812
  A strong normative claim from Book 2 recapitulated in the appendix as a verifiable and surprising conclusion.
• The intricate and beautiful structure of living centers comes about naturally, and most of the time without effort, as a result of the repeated application of structure-preserving transformations to the wholeness which exists.claim0.805
  Central interpretive claim of the chapter, asserting that living structure is an effortless natural outcome of structure-preserving transformations.
• The creation of living structure cannot be done in any other way.claim0.804
• A structure-preserving transformation both preserves existing structure and enhances the whole by developing latent centers.claim0.802
  Resolution of the apparent conflict between preserving and enhancing.
• A truly dynamic structure-preserving process generates layouts in which every single bit of space becomes a living center — streets, lots, gardens, courtyards, housesclaim0.796
  Core claim about the morphological output of the fundamental process applied to neighborhood design.
• Unless we have a form language which supports the necessities of living structure, then living structure is simply out of our reach.quote0.790
  Emphasizes the necessity of a form language for achieving living structure.
• This process is harmful, and has a strong tendency to work against creation of living structure in building design.claim0.788
• Nature manages to create structures that are members of C_living by way of structure-preserving transformations.claim0.785