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
Spatial Web Browsing An Article by Maggie Appleton maggieappleton.com There are some new apps appearing that offer alternative ways of browsing the web...This canvas-based approach adds spatial dimension to the web browsing experience; they allow us to arrange browser windows above, below, to the left, and right of other browser windows. The same way we're able to put an open book next to a piece of paper and below a row of sticky notes in meatspace. Arranging objects in space to create groupings, indicate relationships, and build hierarchies is one of those classical human skills that never goes out of style. Spatial InterfacesSpatial Software spacewwwinterfaces