Dot and neato are
two graph layout tools that share an almost identical graph format.
Dot makes layouts of directed graphs whereas neato is for undirected
graphs. The format has three kinds of items: graphs, nodes, and edges.
The top-level graph can be structured by introducing subgraphs, which
define a subset of nodes and edges. Nodes are identified by their
name. Edges are created when nodes are joined with an edge operator.
Graphs, nodes, and edges can be attributed. Attributes are name-value
pairs of character strings. It is also possible to define new default
values for edge and node attributes (this can be seen as a primitive
form of attribute inheritance). The format has a large number of
predefined attributes (e.g., node shape, line style, color, and layout
parameters such as weights). Application specific attributes, which
are ignored by dot, can be attached as well.
The following gives a code example that contains two nodes (called
'one' and 'two') that are connected with an edge. The edge is colored
red.
digraph G {
one -> two [ color= red ]
}
(Quoted from
ExchangeFormatBibliography)
Resources:
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HolgerKienle