Javascript/PHP Family Tree Builder with Multiple Parents [closed]
You might be interested in Raphaël, especially this demo.
Edit: I just came across a couple other promising-looking options from this question.
- Protovis - I knew about this one when I first answered, but didn't think of it at the time. It's really flexible. Check out the examples.
- Dracula Graph - haven't tried it. It might be too simple for your uses.
As it's just the JavaScript you're after (I assume, since you're designing your own schema...) the InfoVis framework provides all sorts of complicated relationships - http://thejit.org/static/v20/Jit/Examples/ForceDirected/example1.html.
This is possible with Graphviz. It's an (easy to learn) language, and a command-line executable (for Linux, Solaris, Windows and Mac) which can export at least to PNG and SVG. It is extremely flexible and can do family trees. I suppose multiple parents is not a problem at all. Check http://www.graphviz.org/content/kennedyanc for an example. See all the other examples at: http://www.graphviz.org/Gallery.php
You will probably discover several other uses for Graphviz yourself.