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 Lorax A Book by Dr. Seuss dep.wv.gov Deep in the Grickle-grassI speak for the trees!This thing is a ThneedBiggeringThe last of them all+2 More
Deep in the Grickle-grass And deep in the Grickle-grass, some people say, if you look deep enough you can still see, today, where the Lorax once stood just as long as it could before somebody lifted the Lorax away.
This thing is a Thneed "Look, Lorax," I said. "There's no cause for alarm. I chopped just one tree. I am doing no harm. I'm being quite useful. This thing is a Thneed. A Thneed's a Fine-Something-That-All-People-Need! It’s a shirt. It's a sock. It's a glove. It's a hat. But it has other uses. Yes, far beyond that. You can use it for carpets. For pillows! For sheets! Or curtains! Or covers for bicycle seats!" The Lorax said, "Sir! You are crazy with greed. There is no one on earth who would buy that fool Thneed!" production
Biggering I meant no harm. I most truly did not. But I had to grow bigger. So bigger I got. I biggered my factory. I biggered my roads. I biggered my wagons. I biggered the loads of the Thneed’s I shipped out. I was shipping them forth to the South! To the East! To the West! To the North! I went right on biggering...selling more Thneed’s. And I biggered my money, which everyone needs. capitalismproduction
The last of them all And at that very moment, we heard a loud whack! From outside in the fields came a sickening smack of an axe on a tree. Then we heard the tree fall. The very last Truffula Tree of them all. nature
UNLESS The Lorax said nothing. Just gave me a glance. Just gave me a very sad, sad backward glance, as he lifted himself by the seat of his pants. And I'll never forget the grim look on his face when he hoisted himself and took leave of this place, through a hole in the smog, without leaving a trace. And all that the Lorax left here in this mess was a small pile of rocks, with one word... UNLESS. melancholy
The word of the Lorax But now, says the Once-ler, Now that you're here, the word of the Lorax seems perfectly clear. UNLESS someone like you cares a whole awful lot, nothing is going to get better. It's not. careconservation