5 Graph Description Language (GDL) - Absint

}
< list of node attributes >
The title of a node is any valid C string. Strings have to be enclosed in quotes and may contain the
normal C escapes (e. g. \", \n, \f, . . . ).
5.3 Edge Format
There are several different kinds of edges:
• ordinary edges (see p. 43)
• back edges (see p. 43)
• near edges (see p. 44)
• left near edges (see p. 44)
• right near edges (see p. 44)
• bent near edges (see p. 44)
• left bent near edges (see p. 45)
• right bent near edges (see p. 45)
5.3.1 Ordinary Edge Format
An ordinary edge is specified by
edge: {
source: < title of source node >
target: < title of target node >
< list of edge attributes >
}
5.3.2 Back Edge Format
Back edges are drawn in the opposite direction as compared to ordinary edges. For instance, if the
layout algorithm tries to give all ordinary edges a top-down orientation, it tries to give the back
edges a bottom-up orientation.
If a graph contains a cycle, not all edges can have the same orientation: Some edges have to be
reversed. In this case, the layout algorithm prefers back edges before selecting any other edge to
be reversed.
A back edge is specified by
backedge: {
source: < title of source node >
43