Tagging system to prevent spoilers
A system for marking up text to allow for variable disclosure of
information or alternate information based on user controls - (ie the
content of a companion site would display information only up to specific
points in the plot that was desired) - Dumbledore [sp (t>b6c27)?is|was]
headmaster of hogwarts]
Check out http://towerofthehand.com/ and click on the Scope div.