RE: XML ELEMENT value required?

["David Spreadbury" <David -dot- Spreadbury -at- afc -dot- com>]

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.

Example:

<!ATTLIST SPECIES
LatinName CDATA #REQUIRED
ReferenceType CDATA #IMPLIED
ReferenceNum CDATA #IMPLIED

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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