If an element is nil, child elements of this elements do not trigger a
validation error
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Key: XERCESC-1944
URL: https://issues.apache.org/jira/browse/XERCESC-1944
Project: Xerces-C++
Issue Type: Bug
Components: Validating Parser (XML Schema)
Affects Versions: 3.1.0
Environment: Windows XP, Microsoft Visual C++ 2008
Reporter: Andreas Awenius
If an element is nil (xsi:nil="true") and this element has child elements,
Xercesc 3.1.0 does not report an error, although it should.
According to this link:
http://www.w3.org/TR/2004/REC-xmlschema-1-20041028/#cvc-elt
an element that is nil may not have any content and any child elements.
This behavior was also verified with Fujitsu's XWand XBRL Processor and Altovas
XMLSpy, which both issue this error.
It seems as if Xercesc tries to implement this behavior, given that the
comments in SchemaValidator.cpp, line 129 are a direct copy of the mentioned
web page:
// if nillable, it's an error to have value
// XML Schema REC: Validation Rule: Element Locally Valid (Element)
// 3.2.1 The element information item must have no
// character or element information item [children].
//
However, no error is issued in such a constellation.
There is a related issue:
If the first child element of the nilled value (which is *not* nil) has
content, Xercesc issues the misguiding error message:
Message: element '<name>' is nil and must be empty
It seems, as if the nil-flag of the parent element is incorrectly set for the
child element.
For the second and all other child elements this is not the case (no error is
reported).
Steps to reproduce:
Use the attached schema and instance document.
Invoke the DOMCount-sample from the Xercesc-distribution like this:
DOMCount.exe -v=always -s -n -f shiporder.xml
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