Graphviz: Putting a Caption on a Node In Addition to a Label

Question

In my Graphviz graph (written in DOT), I want each node to have a label, but in addition to that, I want some nodes to have a small caption denoting some other unique value for

Answer 1

To place captions outside the node, you may use xlabel:

digraph g {
    forcelabels=true;
    a [label="Birth of George Washington", xlabel="See also: American Revolution"];
    b [label="Main label", xlabel="Additional caption"];
    a-> b;
}

forcelabels=true makes sure no xlabel is omitted.

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A second option is to use HTML-like labels:

digraph g {
    a[label=
        See also: American Revolution>];
}