python.hanwriter.HanHistogram Node1 python.hanwriter.HanHistogram + acceptChild + nodeType + __init__() + getOutput() + getAlgorithm() Node2 python.hanwriter.Node + subnodes + attributes + acceptChild + nodeType + name + __init__() + tohan() + toprettyhan() + writehan() + appendChild() + setAttribute() + removeAttribute() + getAttribute() + getSubNode() + __str__() Node2->Node1 Node3 DQHanConfMaker::Node Node3->Node2