- From: Jos De_Roo <jos.deroo@agfa.com>
- Date: Mon, 19 Jan 2004 21:49:17 +0100
- To: "pat hayes <phayes" <phayes@ihmc.us>
- Cc: Austin Tate <a.tate@ed.ac.uk>, public-sws-ig@w3.org
PatH: [...] > BTW, the same abstraction works very well for space. Traditional > spatial models start with points (where you click the digitizing pen > on the map) then go to (oriented) line-segments (pair of points) then > to end-linked sequences (paths) then to closed paths (end=beginning > and no crossings) which define (oriented) 2-d regions. These all > build up very nicely as finite structures on points. You can even go > to 3-d and higher, using ideas from homology theory, by stitching > together 2-d cells into 2-d surfaces and defining closure by > cancellation of oriented edges. All of which suggests that this is > indeed a very robust (and certainly very simple) framework. That sounds great Pat - can you recommend any URI pointers ?? Thanks in advance :) -- Jos De Roo, AGFA http://www.agfa.com/w3c/jdroo/ PS we some related work (roll algoritm) 25 years ago but I guess that a lot has evolved since then...
Received on Monday, 19 January 2004 15:49:24 UTC