Namespaces and URNs

John Cowan cowan at
Wed Aug 5 18:54:52 BST 1998

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

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 ""
etc. etc. but that isn't official, just obvious.  1/2 :-)

John Cowan		cowan at
	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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