The problem with trees Many systems are organized hierarchically. The CERNDOC documentation system is an example, as is the Unix file system, and the VMS/HELP system. A tree has the practical advantage of giving every node a unique name. However, it does not allow the system to model the real world. For example, in a hierarchical HELP system such as VMS/HELP, one often gets to a lead on a tree such as: HELP COMPILER SOURCE_FORMAT PRAGMAS DEFAULTS only to find a reference to another leaf: Please see HELP COMPILER COMMAND OPTIONS DEFAULTS PRAGMAS and it is necessary to leave the system and re-enter it. What was needed was a link from one node to another, because in this case the information was not naturally organized into a tree. Tim Berners-Lee, Seeing With Fresh Eyes A City Is Not a Tree hierarchywww
Cool URIs don't change An Essay by Tim Berners-Lee www.w3.org What makes a cool URI? A cool URI is one which does not change. What sorts of URI change? URIs don't change: people change them. The User Interface of URLs www
Shorten the wings The labile tastes of certain decision-makers in a company are often a great burden for designers. Too many feel themselves qualified to pass judgment. And how insensitive, how superficial these judgments often are. Taste, believes Rams, is something that needs to be trained, since the aesthetic decisions at this level in product design are intrinsically bound to the entire form and function of the object. It would be unimaginable, for example, that the management of an aerospace company would ask the designers of a new plane to shorten the wings because they think it would make it look prettier. Sophie Lovell & Dieter Rams, Dieter Rams: As Little Design as Possible Classical absurdity worktaste