Text is okay, but describing a graph is difficult and not as intuitive as a diagram. This doesn't mean UML is needed for the diagram, however the alternative i

Text is okay, but describing a graph is difficult and not as intuitive as a diagram. This doesn't mean UML is needed for the diagram, however the alternative is a semantically weak ad hoc diagram, and I'm not a fan of UML even though have plenty of experience, I agree that UML basically had good intentions for a real problem, poorly executed.