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   Re: Valid XML Documents

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  • From: Chris Maden <crism@oreilly.com>
  • To: xml-dev@ic.ac.uk
  • Date: Fri, 6 Aug 1999 16:46:52 -0400 (EDT)

[Mallikarjuna Sangappa]
> Are the following XML Documents valid

None of them are because they don't have DTDs.  I suspect you meant,
"are they well formed?" which I will answer.

> 1. 

Yes.  A PERSON element contains a new line, a FIRSTNAME element, and
another new line.  The FIRSTNAME contains only a new line.

> 2. 

No.  You start a PERSON element, which has text content of "
" (the entity reference is resolved) but then you come to an end-tag
for an element type that was never opened.

> 3. 

Yes.  Here you have a PERSON element whose content is "
" (all text, not markup).

You may find the XML Recommendation useful:

<!ENTITY crism PUBLIC "-//O'Reilly//NONSGML Christopher R. Maden//EN"
"<URL>http://www.oreilly.com/people/staff/crism/ <TEL>+1.617.499.7487
<USMAIL>90 Sherman Street, Cambridge, MA 02140 USA" NDATA SGML.Geek>

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