> indeed URN would be a good idea and solve the problem completely. there is
> no need to define standard URN. if the URN is the same as you store locally;
> then there is no need to resolve the URN or search the standard set; just
> use the local copy on your disk.
If the icons are used by many people then there will be lots of different
URLs for each icon. Perhaps we ought to resurrect Tim's URN attribute
for links, e.g.
<img src="http://foo.edu/WWW/icons/folder.xpm" urn="folder.icons.www">
The URN attribute here specifies a common name you can use to check
if the one in your local cache is really the same object, regardless
of where you obtained that one from. When you retrieve an icon over
the net, its URN is given by an HTTP header (which header Tim?).
I have already suggested that we go ahead and start defining URNs
based on the same domain syntax as host names, see my message of the