graphviz defining more "defaults" - graphviz

Question

Need draw a complex graph where will be 3 types of edges, and several predefined node-types.
Is possible somewhat define more (e.g. not only one default) "edge type" (or node-type) for the later use?
mean something like:
edge [colorscheme=paired12, color=8, fontsize=11, fontname="Arial narrow"];
edge2 [colorscheme=paired12, color=3, fontsize=11, fontname="Arial narrow", style=bold];
edge3 [colorscheme=paired12, color=5, fontsize=14, fontname="Arial narrow"];
node1 -> node2; /* will use the default edge definition from the above */
node2 -> node3 [edgetype=edge2]; /* will use the second edge definition */
node2 -> node4 [edgetype=edge3]; /* and so on... */
The above, ofc, is not correct - only for explanation...

Answer 1

Using gvpr is simple, if you figure out the basics:
input.dot
digraph test {
node1 -> node2[label="test 1"]; /* will use the default edge definition from the above */
node2 -> node3 [label="test 2", edgetype="edge2"]; /* will use the second edge definition */
node2 -> node4 [label="test 3", edgetype="edge3"]; /* and so on... */
}
filter.gvpr
E {
color="red";
fontsize=11;
fontname="Arial narrow"
}
E[edgetype == "edge2"] {
color="green";
fontsize=11;
fontname="Arial narrow";
style="bold"
}
E[edgetype == "edge3"] {
color="blue";
fontsize=14;
fontname="Arial narrow"
}
With command
gvpr -c -f filter.gvpr -o output.dot input.dot
will produce the output.dot file:
digraph test {
node1 -> node2 [color=red,
fontname="Arial narrow",
fontsize=11,
label="test 1"];
node2 -> node3 [color=green,
edgetype=edge2,
fontname="Arial narrow",
fontsize=11,
label="test 2",
style=bold];
node2 -> node4 [color=blue,
edgetype=edge3,
fontname="Arial narrow",
fontsize=14,
label="test 3"];
}

Answer 2

No, that is not possible.
I often group edge definitions by their type, and redefine the default before each group. For example:
// type 1 edges
edge [colorscheme=paired12, color=8, fontsize=11, fontname="Arial narrow"];
n1 -> n2;
n3 -> n4;
...
// type 2 edges
edge [colorscheme=paired12, color=3, fontsize=11, fontname="Arial narrow", style=bold];
n10 -> n11;
...
// type 3 edges
edge [colorscheme=paired12, color=5, fontsize=14, fontname="Arial narrow"];
...
An other - more complicated - possibility would be to use a tool like gvpr which lets you manipulate a graph, and add edge attributes at that moment.