[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

RE: Just require URLs

  • From: "Didier PH Martin" <martind@n...>
  • To: "Jonathan Borden" <jborden@m...>, <xml-dev@i...>
  • Date: Tue, 1 Jun 1999 06:55:46 -0400

RE: Just require URLs
Hi Jonathan,

Jonathan said:
Note that when the string "http://www.w3.org/xxx" is used as an XML
namespace URI this is a URN not a URL by definition (the scheme remains

Didier says:
Not exactly. The string http://www3.org/xxx cannot be considered a URN it is
a URL based on the HTTP scheme. The example below is a URN:


To be qualified as a URN the string should be structured as follow:

urn:<NID>:<name space>

<NID> :: Name space identifier
<name space> :: any string constructed as defined in RFC 2141 (some
characters like "/" needs to be encoded for resolution but not for human

To see the difference let's take LDAP.

URL---> LDAP://ldap.itd.umich.edu/c=us
URN---> urn:ldap:c=us

In a URN we tend not to include a domain name witch is absolutely required
for URL but not for URN. In fact, to include a location dependent context in
a name jeopardize the permanency requirement.

Didier PH Martin

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i...
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1
To (un)subscribe, mailto:majordomo@i... the following message;
(un)subscribe xml-dev
To subscribe to the digests, mailto:majordomo@i... the following message;
subscribe xml-dev-digest
List coordinator, Henry Rzepa (mailto:rzepa@i...)


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.