Javascript library for node-based objects and object relationships?

Question

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

http://www.brandspankingnew.net/img/headers/yahoo_pipes.jpg

Answer 1

d3.js works well for things like this. You can see examples and learn more at http://mbostock.github.com/d3/.