- From: Robin Berjon <robin@berjon.com>
- Date: Fri, 21 May 2010 11:28:19 +0200
- To: Jonas Sicking <jonas@sicking.cc>
- Cc: nathan@webr3.org, arun@mozilla.com, Web Applications Working Group WG <public-webapps@w3.org>, public-device-apis <public-device-apis@w3.org>
On May 21, 2010, at 00:41 , Jonas Sicking wrote: > On Thu, May 20, 2010 at 2:53 PM, Nathan <nathan@webr3.org> wrote: >> If the scope of the identifiers is limited to a single ua, on a single >> machine, and specific to that single ua (as in I can't expect to request the >> identifier outside of the ua that provided it on x machine and get the same >> results) then I (personally) can't see why there's a need for anything more >> than a simple unique identifier (sha1 or suchlike) > Note that the important point of these URNs isn't that they are > identifiers, but rather that you can point a <iframe>.src, or a > <img>.src, or a #myElement { background-url: url(...) } at them. Right, and to further Jonas's explanation, imagine .url (or .id, or whatever) returned a simple identifier, say some opaque hex string of sorts like "DEADBEEF". Now you want to get that image file and assign it as the source of an <img> (which is the whole point): img.src = file.url; If your document is at http://deadbff.org/foo/ you've essentially made your image element link to http://deadbff.org/foo/DEADBEEF. That's not what you wanted. Using a syntax (be it URI scheme or URN) that can naturally disambiguate between relative URI references and these "magic" references is, alas, needed. -- Robin Berjon - http://berjon.com/
Received on Friday, 21 May 2010 09:28:50 UTC