\tikzset{uml box/.style={draw, text width=3cm, minimum height=1.5cm, text badly centered, font=\sffamily\bfseries},
	uml class/.style={rectangle split, rectangle split parts=2, draw, minimum width=0, font=\sffamily},
	uml directed/.style={thick, -angle 90},
	uml aggregation head/.style={shape=diamond, aspect=.5, anchor=north, thick, draw},
	uml composition head/.style={shape=diamond, aspect=.5, anchor=north, thick, filldraw},
	uml generalization head/.style={shape=isosceles triangle, isosceles triangle apex angle=60, shape border rotate=90, scale=.8, draw, thick, anchor=apex},
	uml cardinality start/.style={very near start, auto, font=\sffamily},
	uml cardinality end/.style={very near end, auto, font=\sffamily},
	uml role start/.style={very near start, auto, font=\footnotesize\sffamily},
	uml role end/.style={near end, auto, font=\footnotesize\sffamily},
	uml association name/.style={midway, auto, font=\footnotesize\sffamily},
}%