5 Graph Description Language (GDL) - Absint

5.6 Examples of GDL Specifications
5.6.1 A Cyclic Graph
These examples show a number of small cyclic graphs without any labels but with different edge
types. The titles are displayed in the nodes. The last example in this sequence shows how the
anchor edge attribute is used.
The layout of the following three example specifications are shown in Figure 13.
Example 1: Ordinary Edges
aiSee tries to give all edges the same orientation. But since the graph is cyclic, one edge has to be
reverted (edge D–>A).
01 graph: {
02 // list of nodes
03 node: { title: "A" }
04 node: { title: "B" }
05 node: { title: "C" }
06 note: { title: "D" }
07 node: { title: "E" }
08 // list of edges
09 edge: { source: "A" target: "B" }
10 edge: { source: "A" target: "C" }
11 edge: { source: "C" target: "D" }
12 edge: { source: "D" target: "E" }
13 edge: { source: "D" target: "A" }
14 }
Example 2: Back Edge
The edge to be reverted can be specified as a back edge.
11 backedge: { thickness: 3 source: "C" target: "D" }
Example 3: Near Edges
Near edges can be used to express a close relationship between two nodes and to place nodes rightor
left-neighbored.
09 nearedge: { source: "A" target: "B" }
10 nearedge: { source: "A" target: "C" }
12 nearedge: { source: "D" target: "E" }
The layout of the following three example specifications are shown in Figure 14.
Example 4: Bent Near Edge
In some situations, edges are to be horizontally anchored, like near edges, yet the target node is
not to be at the same level. These edges have to have a bend point. This is why bent near edges are
used.
09 bentnearedge: { source: "A" target: "B" }
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