OASIS Mailing List ArchivesView the OASIS mailing list archive below
or browse/search using MarkMail.


Help: OASIS Mailing Lists Help | MarkMail Help



   Re: Override default in a schema by more specific default in anothersche

[ Lists Home | Date Index | Thread Index ]
  • From: ht@cogsci.ed.ac.uk (Henry S. Thompson)
  • To: "Tolkin, Steve" <Steve.Tolkin@FMR.COM>
  • Date: Sun, 03 Dec 2000 14:57:15 +0000

"Tolkin, Steve" <Steve.Tolkin@FMR.COM> writes:

> Suppose I have a base schema named e.g. base.xsd.  This sets the default
> value for an attribute to e.g. base_value.  I know I can override this in
> the instance document, e.g. foo.xml.  But what I want is to provide a more
> specific default value in another another schema document, e.g. to org_value
> in org.xsd.  Can I do this?  If I can do two levels I assume I can do n
> levels, e.g. make the default my_value in my.xsd, etc.

This functionality is not supported by XML Schema.  All derivation in
XML Schema is based on restriction or extension, and it's not clear to 
me what this would mean in this case.  You _can_ restrict a
declaration w/o a default to have one, but what does it mean to be a
'more specific' default?

  Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
          W3C Fellow 1999--2001, part-time member of W3C Team
     2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
	    Fax: (44) 131 650-4587, e-mail: ht@cogsci.ed.ac.uk
		     URL: http://www.ltg.ed.ac.uk/~ht/


News | XML in Industry | Calendar | XML Registry
Marketplace | Resources | MyXML.org | Sponsors | Privacy Statement

Copyright 2001 XML.org. This site is hosted by OASIS