Examples of trivial graph format. Can be imported by yED.
The simplest version is this:
one two label for edge from one to two
three four another label on the other edge
one three
etc.
This version allows you to have longer node labels: (a list of nodes followed by a list of edges, separated by “#”).
one the label for one
two the label for two
#
one two label for edge from one to two
three four another label on the other edge
one three
(you don’t have to line up the labels as I have here, you can just have a one-space gap, but it looks nicer)
or
1 goal
1.1 outcome one
1.1.1 activity one
1.2 outcome two
1.2.1 activity two
#
1.1 1
1.1.1 1.1
1.2 1
1.2.1 1.2