Superstruct was an online free-style game run in Oct 2008 by the Institute for the Future. It was intended to draw on crowdsourcing to discover new approaches to global problems. The game (and database) is no longer available and what is shown below is a static example with only limited functionality. For those interested, the preamble may still be found here, and the conclusions are listed here.
This is an early attempt to represent the various components of Superstruct graphically. It was abandoned in favour of a tag cloud approach (a static screen display of which is visible here). However, it does demonstrate the use of PHP and SVG for the layout and display, as well as javascript and AJAX for the tooltip display (Move the mouse over the superstruct symbols to see the effect).
Too much information! (More information is available here)
NB: some browsers infected with Oepidus2020 may not be able to view the struct layout.
If you cannot see the display below, then you need to visit this site for assessment and cure.