graph [ graph attributes node list edge list ]
node [ node attributes graphics [ graphical attributes ] ]
edge [ edge attributes graphics [ graphical attributes ] ]
A node list contains: a unique ID number for each node; the label of the node (if there is one); and graphical attributes, such as the color (as an RGB triplet) of the node, as indicated in the "fill" field. The default color of a node is white, which is used if no "fill" attribute exists. Here is an example node datum:
node [ id 23 label "XANTHOSINE NUCLEOTIDE" graphics [ fill "#ffd9bc" ] ]
An edge list contains: the id of the source node; the id of the target node; and graphical attributes, such as the position of the arrowhead ("first" means source, "last" means target, "both" means arrowheads at source and target, "none" means no arrowheads). Here is an example edge datum:
edge [ source 23 target 35 graphics [ arrow "last" ] ]
Questions about this graph should be addressed to Franz Brandenburg <firstname.lastname@example.org>.