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   RE: [xml-dev] converting XML Schema to DTD

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Thanks John! Actually the question was what is the equivalent of the
following schema definition in DTD terms?


<xs:element name="personnel">
	<xs:element name="lname" minOccurs="0"/>
	<xs:element name="fname" minOccurs="0"/>

XML Spy created the following DTD:
<!ELEMENT fname (#PCDATA)>
<!ELEMENT lname (#PCDATA)>
<!ELEMENT personnel (lname?, fname?)>

This is not correct because the DTD will not validate the following:

The schema will validate both



-----Original Message-----
From: John Cowan [mailto:jcowan@reutershealth.com]
Sent: Monday, January 28, 2002 2:50 PM
To: Banerjee, Saurabh
Cc: 'xml-dev@lists.xml.org'
Subject: Re: [xml-dev] converting XML Schema to DTD

Banerjee, Saurabh wrote:

> this is not correct because the XML below is INVALID with the DTD but
> with the SCHEMA.
> <?xml version="1.0" encoding="UTF-8"?>
> <!--Sample XML file generated by XML Spy v4.2 U (http://www.xmlspy.com)-->
> <personnel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
> xsi:noNamespaceSchemaLocation="D:\dtd2xs\try.xsd">
> 	<fname>String1</fname>
> 	<lname>String2</lname>
> </personnel>

That is because DTDs do not know about namespace prefixes,

or the magic properties of xsi:* to Schema.  You must declare these
attributes in your DTD by adding the following (at minimum):

<!ATTLIST personnel
	xmlns:xsi CDATA #IMPLIED
	xsi:noNamespaceSchemaLocation CDATA #IMPLIED>

John Cowan <jcowan@reutershealth.com>     http://www.reutershealth.com
I amar prestar aen, han mathon ne nen,    http://www.ccil.org/~cowan
han mathon ne chae, a han noston ne 'wilith.  --Galadriel, _LOTR:FOTR_


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