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Subject:RE: XML ELEMENT value required? From:"David Spreadbury" <David -dot- Spreadbury -at- afc -dot- com> To:"TECHWR-L" <techwr-l -at- lists -dot- raycomm -dot- com> Date:Fri, 2 Apr 2004 12:40:04 -0800
Ned's question was:
"... can I force an XML element's value to be required ?"
Not if the value was valid.
The way I understand XML, is if the DTD "requires" an attribute, whether it is a valid attribute or not, there better be an attribute there.
-----Original Message-----
From: David Spreadbury
Sent: Friday, April 02, 2004 2:02 PM
To: 'Mark Baker'; TECHWR-L
Subject: RE: XML ELEMENT value required?
Yes, in XML 1.0, it is specified in the DTD as #REQUIRED, which means the element must explicitly provide a value for this attribute each time it is used.
The above excerpted from "Inside XML DTDs, by St. Laurent and Biggar, ISBN 0-07-134621-X.
-----Original Message-----
From: Mark Baker [mailto:listsub -at- analecta -dot- com]
Sent: Friday, April 02, 2004 2:00 PM
To: TECHWR-L
Subject: Re: XML ELEMENT value required?
Ned Bedinger asked:
> In an XML DTD, can I force an XML element's value
> to be
> required ? I want the parser to kick out an error
> if a certain element doesn't have a value.
In a DTD, no. In a schema, yes, by specifying its data type.
You can, of course, check for a value in the prcessing application that
receives the parsed data.
---
Mark Baker
Analecta Communications
www.analecta.com
+1 613 614 5881
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