You tell me - about the both the presence of marker and the 'marker-start/mid/end' attributes? But you are right, it wasn't a thoughtful comment - the case of the inheritance in the second example with groups clearly demonstrates how both attributes might be present yet one of them needs to take precedence. Sorry ;-) I'm an SVG/XML ignoramus - obviously!
You tell me - about the both the presence of marker and the 'marker- start/mid/ end' attributes? But you are right, it wasn't a thoughtful comment - the case of the inheritance in the second example with groups clearly demonstrates how both attributes might be present yet one of them needs to take precedence. Sorry ;-) I'm an SVG/XML ignoramus - obviously!