[Zope] Flow-Charts

Hi, Somebody already created Flow-Charts (not graphical) or something in Zope? I want to create a certain log-book, but the solutions can be created/shown in flow-chart style. ie. 'First try out the network, if this fails go to...' every state is a new Zope object in the hierarchy. (This instead of just plain text) Next, not for now, but maybe in the future, are there python libraries which can graphically show a flowchart? Thanks; Tom.