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1.1 root 1: .PS
2: .ps 20
3: ## figure A-15
4:
5: boxwid = 2*boxwid
6:
7: B1: box "user"
8: B2: box with .n at (B1.s.x,B1.s.y-boxht/1.5) width 1.5*boxwid height 5*boxht
9: B4: box "session" with .sw at B2.sw width 1.5*boxwid
10: B3: box "UA" \
11: with .n at (B2.n.x,B2.n.y-(B2.n.y-B4.n.y)/6) width 1.25*boxwid height boxht
12: B5: box "MTA" \
13: with .s at (B2.n.x,B4.n.y+(B2.n.y-B4.n.y)/6) width 1.25*boxwid height boxht
14: B6: box invis "$\ldots$" with .nw at B2.sw width 1.5*boxwid
15: ##
16: L1: line <-> from (B1.sw.x-(B1.sw.x-B1.s.x)/2,B1.s.y) \
17: to (B1.sw.x-(B1.sw.x-B1.s.x)/2,B3.n.y)
18: L2: line <-> from (B1.se.x-(B1.se.x-B1.s.x)/2,B1.s.y) \
19: to (B1.se.x-(B1.se.x-B1.s.x)/2,B3.n.y)
20: L3: line <-> from (B1.sw.x-(B1.sw.x-B1.s.x)/2,B3.s.y) \
21: to (B1.sw.x-(B1.sw.x-B1.s.x)/2,B5.n.y)
22: L4: line <-> from (B1.se.x-(B1.se.x-B1.s.x)/2,B3.s.y) \
23: to (B1.se.x-(B1.se.x-B1.s.x)/2,B5.n.y)
24: L5: line <-> from (B1.sw.x-(B1.sw.x-B1.s.x)/2,B5.s.y) \
25: to (B1.sw.x-(B1.sw.x-B1.s.x)/2,B4.n.y)
26: L6: line <-> from (B1.se.x-(B1.se.x-B1.s.x)/2,B5.s.y) \
27: to (B1.se.x-(B1.se.x-B1.s.x)/2,B4.n.y)
28: ##
29: B21: box invis with .nw at (B1.ne.x+(B2.ne.x-B2.nw.x),B1.nw.y)
30: B22: box with .n at (B21.s.x,B3.s.y-(B3.s.y-B5.n.y)/2) width 1.5*boxwid \
31: height (B3.s.y - B2.s.y) - (B3.s.y-B5.n.y)/2
32: B24: box "session" with .sw at B22.sw width 1.5*boxwid
33: B25: box "MTA" with .s at (B22.c.x,B5.s.y) width 1.25*boxwid
34: B26: box invis "$\ldots$" with .nw at B22.sw width 1.5*boxwid
35: ##
36: L25: line <-> from (B21.sw.x-(B21.sw.x-B21.s.x)/2,B25.s.y) \
37: to (B21.sw.x-(B21.sw.x-B21.s.x)/2,B24.n.y)
38: L26: line <-> from (B21.se.x-(B21.se.x-B21.s.x)/2,B25.s.y) \
39: to (B21.se.x-(B21.se.x-B21.s.x)/2,B24.n.y)
40: ##
41: B11: box "user" with .nw at (B21.ne.x+(B22.ne.x-B22.nw.x),B21.nw.y)
42: B12: box with .n at (B11.s.x,B11.s.y-boxht/1.5) width 1.5*boxwid height 5*boxht
43: B14: box "session" with .sw at B12.sw width 1.5*boxwid
44: B13: box "UA" \
45: with .n at (B12.n.x,B12.n.y-(B12.n.y-B14.n.y)/6) width 1.25*boxwid height boxht
46: B15: box "MTA" \
47: with .s at (B12.n.x,B14.n.y+(B12.n.y-B14.n.y)/6) width 1.25*boxwid height boxht
48: B16: box invis "$\ldots$" with .nw at B12.sw width 1.5*boxwid
49: ##
50: L11: line <-> from (B11.sw.x-(B11.sw.x-B11.s.x)/2,B11.s.y) \
51: to (B11.sw.x-(B11.sw.x-B11.s.x)/2,B13.n.y)
52: L12: line <-> from (B11.se.x-(B11.se.x-B11.s.x)/2,B11.s.y) \
53: to (B11.se.x-(B11.se.x-B11.s.x)/2,B13.n.y)
54: L13: line <-> from (B11.sw.x-(B11.sw.x-B11.s.x)/2,B13.s.y) \
55: to (B11.sw.x-(B11.sw.x-B11.s.x)/2,B15.n.y)
56: L14: line <-> from (B11.se.x-(B11.se.x-B11.s.x)/2,B13.s.y) \
57: to (B11.se.x-(B11.se.x-B11.s.x)/2,B15.n.y)
58: L15: line <-> from (B11.sw.x-(B11.sw.x-B11.s.x)/2,B15.s.y) \
59: to (B11.sw.x-(B11.sw.x-B11.s.x)/2,B14.n.y)
60: L16: line <-> from (B11.se.x-(B11.se.x-B11.s.x)/2,B15.s.y) \
61: to (B11.se.x-(B11.se.x-B11.s.x)/2,B14.n.y)
62: ##
63: L30: line <-> dashed from B3.e to B13.w "P2" ""
64: L31: line <-> dashed from B5.e to B25.w "P1" ""
65: L32: line <-> dashed from B25.e to B15.w "P1" ""
66: ##
67: .PE
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