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
The Gifted Listener: Composer Aaron Copland on Honing Your Talent for Listening to Music An Article by Maria Popova www.brainpickings.org The poetry of music, Copland intimates, is composed both by the musician, in the creation of music and its interpretation in performance, and by the listener, in the act of listening that is itself the work of reflective interpretation. This makes listening as much a creative act as composition and performance — not a passive receptivity to the object that is music, but an active practice that confers upon the object its meaning: an art to be mastered, a talent to be honed. Music and ImaginationTo see is to forget the name of the thing one seesThe core assertion musicpoetryartmeaning