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"Validity" means that the document has a DOCTYPE declaration that points to a DTD and the document conforms to the declarations in that DTD. Your sample shows no reference to a DTD, so validity is not an issue. It is well-formed, which is why parsers have no problem with it.
 
Bob DuCharme            http://www.snee.com/bob         <bob@ 
snee.com>  see http://www.snee.com/bob/xsltquickly for
info on book "XSLT Quickly" from Manning Publications.


From: Daniel Zingaro [mailto:daniel_zingaro@c...]
Sent: Tuesday, October 19, 2004 3:50 PM
To: xml-dev@l...
Subject: Invalid XML

Hi all,
 
According to the XML specification, I believe the following nesting structure to be invalid in XML. However, rxp on my Windows machine issues no warnings to me when parsed. Is this in fact invalid?
 
 <?xml version="1.1"?>
<library>
<book>
<title>Book Name</title>
<chapters>
<name>first chapter</name>
<name>second</name>
...
<name>last</name>
<subsection>
<name>I expect this to be illegal, since name is defined in chapters,
and also somewhere else in its content, namely subsection.</name>
</subsection>
</chapters>
</book>
</library>
 
Thanks very much,
Dan
 

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