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
Seeing and Knowing An Essay from The Beauty of Everyday Things by Yanagi Sōetsu The results of intuition can be studied by the intellect, but the intellect cannot give birth to intuition. Scholars and criticsUnderstanding its essence knowledgeintuitionseeing
Scholars and critics Let us take a look at how one of these scholars or critics goes about his work. Let’s say he is going to write a commentary on a particular painting. If he is not a man of intuition, certain features will characterize his approach. First he will try to place the painting genealogically, or he will try to define the painting by assigning it to a particular school. He feels uneasy unless he succeeds in doing this. But more than anything, he is extremely wordy. He seems incapable of speaking of beauty without innumerable layers of adjectives. critique
Understanding its essence One can study an object and note its features, but that only touches the surface. A knowledge of an artwork’s properties does not lead to an understanding of its essence. understanding