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1.1 root 1: .PS 5.0i
2: lineht = 3*lineht/2
3: ## figure A-32
4: B1: box "\sf (N)-service" "\sf user"
5: line down from B1.s
6: B3: box "\sf (N)-service" "\sf entity"
7: line down from B3.s
8: B5: box invis
9: ##
10: B2: box "\sf (N)-service" "\sf user" with .w at (B1.e.x+3*linewid, B1.e.y)
11: line down from B2.s
12: B4: box "\sf (N)-service" "\sf entity"
13: line down from B4.s
14: B6: box invis
15: ##
16: line from B3.e to B4.w dashed
17: move to ((B3.e.x+B4.w.x)/2, B3.e.y) \
18: "\sf \begin{tabular}{c} (N)-service protocol\\ specification\end{tabular}"
19: ##
20: B7: box "\sf (N-1)-service provider" with .nw at B5.nw width (B6.ne.x-B5.nw.x)
21: ##
22: B10: box dashed with .nw at (B1.w.x-linewid/2, (B1.s.y+B3.n.y)/2) \
23: height (B1.s.y-B7.s.y) \
24: width ((B2.e.x+linewid/2)-(B1.w.x-linewid/2))
25: move to B10.ne; \
26: "\sf \ \begin{tabular}{c}(N)-service\\ definition\end{tabular}" ljust
27: ##
28: B8: box invis "\sf (N)-service access point" \
29: with .n at ((B1.c.x+B2.c.x)/2, B1.s.y) \
30: height boxht/2 width 3*boxwid/2
31: arrow from (B8.sw.x, B8.sw.y+boxht/10) \
32: to (B3.n.x+linewid/12, (B1.s.y+B3.n.y)/2+lineht/20)
33: arrow from (B8.se.x, B8.se.y+boxht/10) \
34: to (B4.n.x-linewid/12, (B2.s.y+B4.n.y)/2+lineht/20)
35: ##
36: B9: box invis with .s at B7.n \
37: height lineht/2 \
38: width (B4.c.x-B2.c.x) \
39: "\sf (N-1)-service access point"
40: arrow from (B8.sw.x, B9.c.y-boxht/10) \
41: to (B3.n.x+linewid/12, B7.n.y+lineht/20)
42: arrow from (B8.se.x, B9.c.y-boxht/10) \
43: to (B4.n.x-linewid/12, B7.n.y+lineht/20)
44: ##
45: .PE
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