- From: John Cowan <jcowan@reutershealth.com>
- Date: Wed, 9 Jul 2003 13:23:30 -0400
- To: "Weibel,Stu" <weibel@oclc.org>
- Cc: uri@w3.org
Weibel,Stu scripsit: > The distinction between the first and the second resides at the DNS level > (two domains pointed at the same machine... not all that uncommon). Clearly > these two are different URLs that resolve to the same resource. So you say. But how do we know that, absent a clear-cut operational definition of "resource"? A resource cannot be identified with the MIME entity body that is returned when you GET it: the resources may be different even though the entity bodies are bit-for-bit identical and have the same media type; contrariwise, a single resource may return different entity bodies on different retrievals. So the most you can say is that two URIs always return the same entity bodies (or none at all), which cannot be established empirically because it has to span the entire past and future history of those URIs. -- John Cowan www.ccil.org/~cowan www.reutershealth.com jcowan@reutershealth.com All "isms" should be "wasms". --Abbie
Received on Wednesday, 9 July 2003 13:24:48 UTC