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
Truisms An Artwork by Jenny Holzer www.moma.org Holzer began creating these works in 1977, when she was a student in an independent study program. She hand-typed numerous "one liners," or Truisms, which she has likened, partly in jest, to a "Jenny Holzer's Reader's Digest version of Western and Eastern thought." She typeset the sentences in alphabetical order and printed them inexpensively, using commercial printing processes. She then distributed the sheets at random and pasted them up as posters around the city. Her Truisms eventually adorned a variety of formats, including T-shirts and baseball caps. Design Leadership Truisms truthwisdomlife