expand_less In object oriented languages, there is always one master class that all the other classes inherit from.  There is a root in the inheritance tree.  In ruby, this is the Object class, in content we propose the [[Card]].  Developed in the context of a rails web application that shares and extends wiki concepts, cards are designed to to support web interfaces and wiki practices, but as we shall seen along the way, each of these features can be considered and packaged as optional components in a much larger space of applications development.
Though the current implementation of the card model rests firmly on rails and active record, it need not be so forever.  There is no reason an enterprising team cannot