- From: Richard Cyganiak <richard@cyganiak.de>
- Date: Mon, 11 Jun 2007 18:36:57 +0200
- To: Jon Hanna <jon@hackcraft.net>
- Cc: "M. David Peterson" <m.david@xmlhacker.com>, Tim Berners-Lee <timbl@w3.org>, "r.j.koppes" <rikkert@rikkertkoppes.com>, Yuzhong Qu <yzqu@seu.edu.cn>, Sandro Hawke <sandro@w3.org>, semantic-web@w3.org, swick@w3.org, phayes@ihmc.us
Jon, OK, let's torture an analogy. On 11 Jun 2007, at 12:25, Jon Hanna wrote: >> Imagine a world where everything -- absolutely everything -- has >> one or more unique barcode printed on it. Including passports and >> people. And everyone has a free barcode printer. Tim has simply >> asserted that the barcode on your forehead should be different >> from the barcode on your passport. This does in no way preclude >> you from using your passport to authenticate yourself. > > Now imagine I scan the barcode on my forehead with a barcode reader. > > Does the device refuse to tell me anything about myself because I'm > a physical real-world resource and it needs to be redirected to > scanning some document about me instead? Of course not. But the device may have to drop the last digit before sending its request to the back end, or it may have to follow an internal indirection before it can retrieve the fact sheet about you. This need not worry users of the device. People whose job is to assign bar codes will have to keep in mind though fact sheets have their own barcodes printed on the back, and this must never be a barcode that has already been used on someone's forehead. Richard > Surely it just displays a bunch of facts about me that are > pertinent to my reason for using this system.
Received on Monday, 11 June 2007 16:37:44 UTC