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
Numbers/Words A Gallery by Daniel Eatock eatock.com Christmastime 04:04:044:56Numeric anagrams
Christmastime 04:04:04 Turn it upside down. I was in a hotel room a few years ago and I woke up in the early hours and glanced at the digital clock radio. It displayed the time using six digits HH:MM:SS Just at the moment I glanced it flicked over to 04:04:04. It occurred to me that, using calculator word logic, this would read ‘ho ho ho’ if viewed upside down. That year I produced a Christmas card with those digits on the front and ‘Christmastime’ printed upside down as the message on the inside. In the absence of any further explanation, absolutely nobody understood the card. numbers
4:56 I was looking at my digital clock last-night and it occurred to me that 4:56 is quite an interesting time. 4 uses four segments of the seven-segment display 5 uses five segments of the seven-segment display 6 uses six segments of the seven-segment display numbers
Numeric anagrams "Eleven plus two" is an anagram of "twelve plus one". — Craig Sharp / Twelve + One = Eleven + Two I love the beauty of this numeric/anagram equation for 13 — Linda Vanderkolk words