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

RE: XML Schema Question

• To: 'Priscilla Walmsley' <priscilla@w...>, xml-dev@l..., "'ht@c...'" <ht@c...>
• Subject: RE: XML Schema Question
• From: "Bullard, Claude L (Len)" <clbullar@i...>
• Date: Tue, 25 Nov 2003 08:27:08 -0600

Thanks to Priscilla, Henry, Bob and Jeff.  
That makes perfect sense.  I'll forward this 
back to the X3D group.   We are in the process 
of cleaning up the schema and DTD.  I think I 
shall continue to use XSV, though, if for no 
other reason than to give feedback on what it 
detects in case that outs any bugs.

If it isn't the gold standard, it ought to be. 
Understand the problems of other consortia building 
on W3C specifications to create ISO standards, and 
you quickly see the problem of authoritative reference. 
Given multiple testers with different parsers, it 
is important to know which tool is the one to trust 
even if it has known bugs.  Better the known than 
the unknown.  While the situation may be getting 
better, schedules for other works are complicated 
by tool diversity.

Systems like X3D that sit atop different consortia 
specifications, the OpenGL and Direct3D 3D languages, 
and then the multitude of device drivers underneath 
are in a boiling soup of bug sources. That should 
make the rich client application developers who must also use 
those subsystems more than a little nervous. So 
we may be forced toward reference implementations 
to get stability even if only in the legal sense.

Betty is right.  This is eerily reminiscent of 1993. 
Are unicorns coming back?

len


From: Priscilla Walmsley [mailto:priscilla@w...]

Hi Len,

Normally, min/maxOccurs are allowed on the choice element.  Those 2 choice
groups are invalid because they each appear as the child of a "group"
element.  XML Schema does not allow min/maxOccurs on the children of
"group".  Instead, you put min/maxOccurs on the _reference_ to the group, as
in: 

<group ref="xxx" minOccurs="0" maxOccurs="6"/>

Hope that helps,
Priscilla

• Follow-Ups:
  • Re: XML Schema Question
    • From: Bob Foster <bob@o...>

• Prev by Date: Re: Re: Gold Standard Schema Parser was Re: XMLSchema Question
• Next by Date: Re: RE : Comparison of Xml documents
• Previous by thread: New programs (semantics, grid computing, web services, service-oriented architecture, ebXML)
• Next by thread: Re: XML Schema Question
• Index(es):
  • Date
  • Thread