double with an optional prefix
The following list gives the legal strings corresponding to values of
the given types.
The syntax for describing legal type strings is a mixture of literal strings,
stdio encodings (e.g.,
%f for a double), and regular expressions.
For regular expressions,
(...)* indicates 0 or more copies of the expression
enclosed in the parentheses,
(...)+ indicates 1 or more, and
(...)? denotes 0 or 1 copy.
Edge arrowhead shape
Boolean; true or false.
List of (optionally weighted) color values, forming a linear gradient
Edge arrow direction type
Double-precision floating point number
String with backslashed escape sequences
The order in which nodes and edges are drawn in output.
How closely to pack together graph components
2-dimensional (or 3-dimensional) geometrical point in space
Port Position: where on a node an edge should be aimed
Direction to draw directed graphs (one rank at a time)
Rank constraints on the nodes in a subgraph
How to initially layout nodes
Text; a sequence of characters.
Clipping window on final drawing
List of graphical operations in Graphviz's