Namespaces and URNs

W. Eliot Kimber eliot at
Wed Aug 5 16:53:00 BST 1998

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 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 <>


<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

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev at
Archived as:
To (un)subscribe, mailto:majordomo at the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo at the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa at

More information about the Xml-dev mailing list