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   Re: Namespaces and URNs

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  • From: John Cowan <cowan@locke.ccil.org>
  • To: XML Dev <xml-dev@ic.ac.uk>
  • Date: Wed, 05 Aug 1998 12:54:23 -0400

W. Eliot Kimber wrote:

> Note that with TC1 to ISO 8879 (SGML) that domain names are recognized as
> registered owner names (equivalent to URN namespace IDs), so if you already
> have a domain name, you can immediately construct FPIs that are guaranteed
> to be universally unique. They will be yours to manage as long as you own
> the domain name.

A Good Thing, but not quite enough....
> For example, the FTI

Is this an error for "FPI", or is this YAA (Yet Another Acronym)?

> "+//IDN drmacro.com//DOCUMENT Practical Hypermedia: An
> Introduction to Xlink and HyTime//EN" is a valid "registered public
> identifier" ("registered" because it uses a registered owner name,
> 'drmacro.com').  For the moment, this name should be resolved to the
> resource at the location <http://www.drmacro.com/bookrev/practhyt>

So far so good. But unfortunately, an XML namespace-name has to be
an URI, and there is as yet no way to map FPIs into URIs, as a
consequence of there being no official URNs yet.

The natural way would be "urn:fpi:+%2F%2FIDN%20drmacro.com%2F%2FDOC"
etc. etc. but that isn't official, just obvious.  1/2 :-)

John Cowan	http://www.ccil.org/~cowan		cowan@ccil.org
	You tollerday donsk?  N.  You tolkatiff scowegian?  Nn.
	You spigotty anglease?  Nnn.  You phonio saxo?  Nnnn.
		Clear all so!  'Tis a Jute.... (Finnegans Wake 16.5)

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