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   Re: Namespaces and URNs

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  • From: "W. Eliot Kimber" <eliot@isogen.com>
  • To: XML Dev <xml-dev@ic.ac.uk>
  • Date: Wed, 05 Aug 1998 09:50:08 -0500

At 04:31 PM 8/4/98 -0400, John Cowan wrote:

>> Having developed 2 DTDs (CML and VHG) I need to know how to prepare URNs
>> for them. It seems clear that anyone wishing to create a DTD which can be
>> used for Namespaces has to buy/borrow a domain name. (I suppose they could
>> buy an FPI instead, but since I already have domain names I'd prefer to
>> stick with those).

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.

For example, the FTI "+//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>


<Address HyTime=bibloc>
W. Eliot Kimber, Senior Consulting SGML Engineer
ISOGEN International Corp.
2200 N. Lamar St., Suite 230, Dallas, TX 75202.  214.953.0004

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