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
Follies A Definition www.britannica.com Folly at Hagley Hall, Hereford and Worcester, built by Sanderson Miller, 1749–50 In architecture, a folly is a costly, generally nonfunctional building that was erected to enhance a natural landscape. Follies first gained popularity in England, and they were particularly in vogue during the 18th and early 19th centuries, when landscape design was dominated by the tenets of Romanticism. Thus, depending on the designer’s or owner’s tastes, a folly might be constructed to resemble a medieval tower, a ruined castle overgrown with vines, or a crumbling Classical temple complete with fallen, eroded columns. To build a follyThermal aediculaeThere it is again architecturebuilding