I am reading a document of Varnish and I get the important VCL state image shown below.
We know we often use UML as a standard to draw a state machine.
but this image is not, is it follow another standard? or not?
I can understand the
start/end diagram (hexagon), state diagram(two rectangle), judgement condition(rhombus),
but I don't understand what the oval represents, please tell me.