- From: Thomas B. Passin <tpassin@comcast.net>
- Date: Sun, 06 Apr 2003 14:51:30 -0400
- To: www-rdf-logic@w3.org
[Jim Farrugia] > > A few comments on your new example. > > If it could, then when the Bot finds stores with "Large-Format" instead > of "SLR", it would know that although "Large-Format" is a kind of camera, > the request 75-300 zoom lenses is out of range. So, then the Bot could > truncate its search more quickly. ?? > In fact, no one really wants just a 75-300 mm zoom lens - the focal length is always relative to the actual film size, and these kind of numbers usually are understood as giving a certain effect for 35 mm film. If you use a 300mm focal length lens with a different film/sensor size, you get the same results as if you used a different focal length lens with a 35 mm camera. It is that particular effect that is usually desired, rather than the focal length per se. You know, there is so much domain-specific information required for this that it might make a good class exercise or test case, but it may be hard to produce a "compelling example" because all the details that have to be captured tend to obscure the point. Cheers, Tom P
Received on Sunday, 6 April 2003 14:47:43 UTC