I'm looking for a Javascript (preferably open source) library for displaying node-based objects and object relationships. Pretty basic stuff: show a node (which can be a simple box) and it's properties. Properties can have values. Sometimes, the value can be a relationship with another node (which creates a line between the two nodes).
Something like this:
http://www.datamation.com/img/2007/02/yahoo-pipes1.jpg
http://g.loquin.free.fr/udk/UnrealKismet%20Main_Sequence.Controls.jpg