- From: Henry S. Thompson <ht@inf.ed.ac.uk>
- Date: Thu, 13 Nov 2008 11:40:55 +0000
- To: "Drummond Reed" <drummond.reed@cordance.net>
- Cc: <www-tag@w3.org>, "'Peter Davis'" <peter.davis@neustar.biz>, <jbradley@mac.com>
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Drummond Reed writes: > [There's] a new proposal for how XRIs can better fit with AWWW > architecture. > . . . > The proposal is written up on an XRI TC wiki page at: > > http://wiki.oasis-open.org/xri/XriAsRelativeUri I've looked at this in some detail, and agree with others' comments that it looks like a very good direction to move in. I think the clarifications that have emerged in this thread wrt what you call the concrete/abstract distinction are important, and should be included, very carefully, in the eventual full specification. I have two remaining concerns: 1) Very little is said about where the necessary base URIs are going to come from. This is almost certainly corrigible going forward, that is, in a new specification, although it will have to be done carefully, and, I hope, with reference to either the Infoset [base URI] property [1] or XML Base [2] insofar as XML-expressed languages are concerned. Retrospective cleanup, for example wrt OpenID's usage of 'short' old-style XRIs such as =jbradley, will be more challenging, but should none-the-less be attempted I think. 2) I think the list of candidate schemes which may be used in XRI-signalling base URIs is too ambitious, unnecessarily so as far as I can see. Including e.g. ftp: is surely to miss the 80-20 point by a long way. More seriously, including urn: is a big mistake. There is no well-defined notion of relative URN, or of absolutisation for URNs. URNs are not what RFC 3986 calls 'hierarchical identifiers', and the RFC says explicitly [3]: "relative references can only be used within the context of a hierarchical URI" Please just don't go there! ht [1] http://www.w3.org/TR/xml-infoset/#infoitem.element [2] http://www.w3.org/TR/xmlbase/ [3] http://www.apps.ietf.org/rfc/rfc3986.html#sec-1.2.3 - -- Henry S. Thompson, School of Informatics, University of Edinburgh Half-time member of W3C Team 10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440 Fax: (44) 131 651-1426, e-mail: ht@inf.ed.ac.uk URL: http://www.ltg.ed.ac.uk/~ht/ [mail really from me _always_ has this .sig -- mail without it is forged spam] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFJHBJIkjnJixAXWBoRAlZeAKCA92xk8cKVybPpNW3oNj2JlLiJ1gCfehZf DKtmOZjTB3RSLDfEktpUDoI= =rif+ -----END PGP SIGNATURE-----
Received on Thursday, 13 November 2008 11:41:43 UTC