XSD validation with minOccurs="1"
Posted: Tue May 04, 2010 7:42 pm
I have a problem validating an XML document against its XSD. Specifically, I have set minOccurs="1" for an element in the XSD. The element does not exist in the XML file. The XML file validates against the XSD without errors! How can this happen? Example code:
XSD:
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="c1">
<xs:complexType>
<xs:sequence>
<xs:choice maxOccurs="unbounded">
<xs:element name="candidate" minOccurs="1" maxOccurs="1">
...
</xs:element>
<xs:element name="party" minOccurs="1" maxOccurs="1">
...
</xs:element>
</xs:choice>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
XML:
<c1>
<candidate ...>
</c1>
Note that there is no party element in the XML, and that it has minOccurs="1" in the XSD. The XML file validates without errors against the XSD, both in oXygen and in my C# validation against the same XSD.
What am I doing wrong? Doesn't minOccurs="1" mean that an element MUST exist at least one time in the XML file?
XSD:
<xs:schema attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="c1">
<xs:complexType>
<xs:sequence>
<xs:choice maxOccurs="unbounded">
<xs:element name="candidate" minOccurs="1" maxOccurs="1">
...
</xs:element>
<xs:element name="party" minOccurs="1" maxOccurs="1">
...
</xs:element>
</xs:choice>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
XML:
<c1>
<candidate ...>
</c1>
Note that there is no party element in the XML, and that it has minOccurs="1" in the XSD. The XML file validates without errors against the XSD, both in oXygen and in my C# validation against the same XSD.
What am I doing wrong? Doesn't minOccurs="1" mean that an element MUST exist at least one time in the XML file?