- From: Mark Nottingham <mnot@mnot.net>
- Date: Mon, 31 Aug 2009 17:39:29 +1000
- To: Anthony Bryan <anthonybryan@gmail.com>
- Cc: Henrik Nordstrom <henrik@henriknordstrom.net>, "Ford, Alan" <alan.ford@roke.co.uk>, Robert Siemer <Robert.Siemer-http@backsla.sh>, ietf-http-wg@w3.org, Mark Handley <m.handley@cs.ucl.ac.uk>
I don't think so; 'alternate' doesn't specify for what purpose it's an alternate, and you need a very precise definition (byte-for-byte equivalence of representations). 'alternate' is often used to mean "here's a copy in another format" and similar. Perhaps you should mint 'duplicate'... Cheers, On 29/08/2009, at 4:01 AM, Anthony Bryan wrote: > On Fri, Aug 28, 2009 at 11:27 AM, Henrik > Nordstrom<henrik@henriknordstrom.net> wrote: >> fre 2009-08-28 klockan 12:38 +0100 skrev Ford, Alan: >> >> * Define a new Mirror profile object, similar to MetaLink but >> defining >> the mirror URL policy for groups of URLs on the server, without going >> into checksums etc (HTTP will give those). >> >> * Instance-Digest header returning the object checksum > > My connection has been down for a few days but here are my very rough > ideas on doing Metalink in HTTP headers with the Link header, Instance > Digests, and perhaps Content-MD5. > > Briefly, it's: > > Link: <http://www2.example.com/example.ext>; rel="alternate"; > Link: <ftp://ftp.example.com/example.ext>; rel="alternate"; > Link: <http://example.com/example.ext.torrent>; rel="describedby"; > type="torrent"; > Link: <http://example.com/example.ext.asc>; rel="describedby"; > type="application/pgp-signature"; > Digest: SHA=thvDyvhfIqlvFe+A9MYgxAfm1q5= > > http://www.ietf.org/id/draft-bryan-metalinkhttp-00.txt > > I've been meaning to ask Mark Nottingham if "alternate" from Link > header fits what we are using it for, to mean identical, duplicate > copy, etc? > > The Link Relation Type registry's initial contents are: > > o Relation Name: alternate > o Description: Designates a substitute for the link's context. > o Reference: [W3C.REC-html401-19991224] > > > -- > (( Anthony Bryan ... Metalink [ http://www.metalinker.org ] > )) Easier, More Reliable, Self Healing Downloads -- Mark Nottingham http://www.mnot.net/
Received on Monday, 31 August 2009 07:40:14 UTC