5 Graph Description Language (GDL) - Absint

08
09 // First the time scale
10
11 node.height: 26
12 node.width: 60
13 node.borderwidth: 0
14 edge.linestyle: dashed
15
16 node: { title: "1972" level: 1 horizontal_order: 1}
17 node: { title: "1976" level: 2 horizontal_order: 1 }
18 node: { title: "1978" level: 3 }
19 node: { title: "1980" level: 4 }
20 node: { title: "1982" level: 5 horizontal_order: 1 }
21 node: { title: "1984" level: 6 }
22 node: { title: "1986" level: 7 }
23 node: { title: "1988" level: 8 }
24 node: { title: "1990" level: 9 }
25 node: { title: "future" level: 10 horizontal_order: 1 }
26
27 edge: { source: "1972" target: "1976" }
28 edge: { source: "1976" target: "1978" }
29 edge: { source: "1978" target: "1980" }
30 edge: { source: "1980" target: "1982" }
31 edge: { source: "1982" target: "1984" }
32 edge: { source: "1984" target: "1986" }
33 edge: { source: "1986" target: "1988" }
34 edge: { source: "1988" target: "1990" }
35 edge: { source: "1990" target: "future" }
36
37 // We need some invisible edge to make the graph fully connected.
38 // Otherwise, the horizontal_order attribute would not work.
39
40 edge: { source: "ksh-i" target: "Perl" linestyle: invisible priority: 0 }
41 edge: { source: "tcsh" target: "tcl" linestyle: invisible priority: 0 }
42 nearedge: { source: "1988" target: "rc" linestyle: invisible }
43 nearedge: { source: "rc" target: "Perl" linestyle: invisible }
44
45 // Now the shells themselves
46 // Note: the default value -1 means: no default
47
48 node.height: -1
49 node.width: -1
50 node.borderwidth: 2
51 edge.linestyle: solid
52
53 node: { title: "Thompson" level: 1 horizontal_order: 2 }
54 node: { title: "Mashey" level: 2 horizontal_order: 3 }
55 node: { title: "Bourne" level: 2 horizontal_order: 2 }
56 node: { title: "Formshell" level: 3 }
57 node: { title: "csh" level: 3 shape: triangle }
58 node: { title: "esh" level: 4 horizontal_order: 2 }
59 node: { title: "vsh" level: 4 }
60 node: { title: "ksh" level: 5 horizontal_order: 3 shape: ellipse }
61 node: { title: "System V" level: 5 horizontal_order: 5 }
62 node: { title: "v9sh" level: 6 }
64