Error in XML Schema part 0 ?

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Hi!

I believe the example po.xml in "XML Schema Part 0: Primer Second
Edition" at http://www.w3.org/TR/xmlschema-0/#po.xml contains an error,
an exclamation mark inside the ending tag of the first "comment" element.

The validator at http://www.w3.org/2001/03/webdata/xsv actually crashes
on this input.

Regards,

Dag Hovland
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