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

Re: Schema Namespace name, schemaLocation, and Schema V ersi

• To: dareo@m...
• Subject: Re: Schema Namespace name, schemaLocation, and Schema V ersioning
• From: David Carlisle <davidc@n...>
• Date: Thu, 18 Jul 2002 09:16:36 +0100
• Cc: jeni@j..., xml-dev@l...
• In-reply-to: <8BD7226E07DDFF49AF5EF4030ACE0B7E0696F63C@r...>(dareo@m...)
• References: <8BD7226E07DDFF49AF5EF4030ACE0B7E0696F63C@r...>

> Versioning based on namespaces is currently very popular,
> especially with the W3C, who have used this mechanism for various XML
> technologies including SOAP, XHTML, XML Schema, and RDF. The namespace
> URI for documents that are versioned using the namespace is typically in
> the following format:
> 
>       http://my.domain.example.org/product/[year/month][/area]


No! the (rather regretable) dated W3C namespace URI are explictly _not_
for versioning, it's just that the W3C uses a dated format for any URI
that they intend to be permanent.

The date just indicates when the namespace name was allocated.

so for example 
http://www.w3.org/1998/Math/MathML
is the namespace for MathML 1, 1.01 and 2.0 (and hopefully all future
versions of MathML)

similarly
http://www.w3.org/1999/XSL/Transform
is the namespace for XSLT 1 and for the XSLT 2 proposal.

(these older ones just have years, W3C started using months more
recently)

The dated format is unfortunate as it leads people to expect the URI to
change when a new version of the language is released on a later date, 
but that's just the way it is.

David

_____________________________________________________________________
This message has been checked for all known viruses by Star Internet
delivered through the MessageLabs Virus Scanning Service. For further
information visit http://www.star.net.uk/stats.asp or alternatively call
Star Internet for details on the Virus Scanning Service.

• Follow-Ups:
  • Re: Schema Namespace name, schemaLocation, and Schema V ersioning
    • From: Dare Obasanjo <kpako@y...>

• References:
  • RE: Schema Namespace name, schemaLocation, and Schema V ersioning
    • From: "Dare Obasanjo" <dareo@m...>

• Prev by Date: RE: Quick Xpath
• Next by Date: Re: Quick Xpath
• Previous by thread: Re: Schema Namespace name, schemaLocation, and Schema V ersioning
• Next by thread: Re: Schema Namespace name, schemaLocation, and Schema V ersioning
• Index(es):
  • Date
  • Thread