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1.1 root 1: .PS 4.0i
2: .ps 20
3: ## figure A-1
4: boxwid = 5 * boxwid
5: boxht = 2 * boxht
6: ##
7: B1: box
8: B2: box with .n at (B1.s.x, B1.s.y-lineht) "PRESENTATION"
9: B3: box with .n at (B2.s.x, B2.s.y-lineht) "SESSION"
10: B4: box with .n at (B3.s.x, B3.s.y-lineht) "TRANSPORT"
11: line from B1.s to B2.n "\ data structures" ljust
12: line from B2.s to B3.n "\ dialogues" ljust
13: line from B3.s to B4.n "\ circuits" ljust
14: ##
15: boxwid = boxwid / 5
16: boxht = boxht / 2
17: B1a: box with .nw at (B1.nw.x+boxwid/2, B1.nw.y-boxht/2) "ACSE"
18: B1b: box with .n at (B1.n.x, B1.n.y-boxht/2) dashed "$\ldots$"
19: B1c: box with .ne at (B1.ne.x-boxwid/2, B1.ne.y-boxht/2) "ROSE"
20: move to (B1.se.x+linewid/2, B1.se.y); \
21: "\begin{tabular}[c]{cc} A&\\ B&S\\ S&Y\\ T&N\\ R&T\\ A&A\\ C&X\\ T& \end{tabular}" ljust
22: ##
23: .PE
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