digraph { compound=true //layout=circo rankdir=LR overlap=false concentrate=false bgcolor=lightblue penwidth=3 splines="true" node [style=filled shape=circle cfontcolor=black] label="\n\nStrong Centers\nformed by unified differences" node [color=red] 1 [label="Strong\nCenter"] node [color=purple fontcolor=white] 2 [label="Thick\nBoundary"] 3 [label="Levels of\nScale"] 4 [label="Alternating\nRepetition"] 5 [label="Local\nSymeteries"] 6 [label="Positive\nSpace"] 7 [label="Roughness" color=blue] 8 [label="Gradient"] 9 [label="Contrast"] node [color=blue] 10 [label="Deep\nInterlock\nand\nAmbiguity"] 11 [label="Echos"color=purple fontcolor=white] 12 [label="Good\nShape" color=purple fontcolor=white] 13 [label="Inner Calm"] 14 [label="Void"] 15 [label="Not-\nSeperateness"] 14 -> 15 14 -> 13 14 -> 1 [penwidth=3] 14 -> 6 //11 -> 15 11 -> 8 11 -> 3 3 -> 8 3 -> 15 15 -> 1 [penwidth=3] 13 -> 1 [penwidth=3] 12 -> 9 6 -> 1 [penwidth=3] 4 -> 5 4 -> 15 7 -> 10 9 -> 2 9 -> 6 8 -> 9 10 -> 15 5 -> 1 [penwidth=3] 5 -> 3 5 -> 11 5 -> 12 5 -> 15 2 -> 1 [penwidth=3] }
I think the Alexander stuck by this set as a comprehensive system of wholeness.
BrainSite 
I wonder what we (Ward's friends) could say about the 15 Properties or transformations of wholness, as they relate to our current work together.
15 Properties
I found this diagram of Alexander's Pattern of Wholeness on Thompson Morrison's site
Strong centers are formed by unified differences.