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

RE: XSD elementFormDefault="unqualified" destroys the benefits

  • From: "Michael Kay" <mike@s...>
  • To: "'Costello, Roger L.'" <costello@m...>,<xml-dev@l...>
  • Date: Wed, 28 Jan 2009 14:11:44 -0000

RE:  XSD elementFormDefault="unqualified" destroys the benefits
> Recall that with XML Schemas you can specify that all 
> elements in conforming instance documents must be 
> namespace-qualified using:
> 
>     elementFormDefault="qualified"
> 
> Or, you can specify that only top-level, global elements must 
> be namespace-qualified using:
> 
>     elementFormDefault="unqualified"

That's not a very accurate precis of the spec. For a start, anything you say
here can be overridden in the form attribute of individual element or
attribute declarations.

> These can yield remarkably different instance documents. 
>
Yes, obviously, changing a default at the top level is likely to have a
major impact. 

> RECOMMENDATION
> 
> Don't use elementFormDefault="unqualified" in your XML 
> Schemas. It destroys the modularity benefits provided by namespaces.
> 
> 
> Do you agree with this recommendation?

Yes. I think there has been a high level of consensus about this for many
years. See for example Walmsley p448 or van der Vlist p159.

Michael Kay
http://www.saxonica.com/



[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index]


PURCHASE STYLUS STUDIO ONLINE TODAY!

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.
Email
First Name
Last Name
Company
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.