I am having a problem with the XercesDOMParser, and the behaviour that I am seeing when using the XercesDOMParser::Val_Always Validation Scheme.
I have an xml document and a simple xsd. The xsd provides a constraint using 'unique': Here is the xsd: <?xml version="1.0" encoding="UTF-8"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";> <xs:element name="authors"> <xs:complexType> <xs:sequence> <xs:element name="author" maxOccurs="unbounded" type="xs:string"/> <xs:element name="lastmodified" type="xs:date" minOccurs="0"/> </xs:sequence> </xs:complexType> <xs:unique name="uniqueAuthor"> <xs:selector xpath="author"/> <xs:field xpath="."/> </xs:unique> </xs:element> </xs:schema> Here is the xml that has a constraint error since the element author must be unique. <?xml version="1.0" encoding="UTF-8"?> <authors xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:noNamespaceSchemaLocation="author.xsd"> <author>tom</author> <author>tim</author> <author>tim</author> <lastmodified>2011-11-11</lastmodified> </authors> When I validate this xml against the xsd using XercesDOMParser::Val_Always it catches the error as expected, however when I use XercesDOMParser::Val_Auto, the document parses successfully without error. If I add another error, such as an unexpected element Val_Auto will catch this error, so I know for sure that the xsd is being read. I have configured the parser as follows: domParser.setValidationConstraintFatal(true); domParser.setDoNamespaces(true); domParser.setDoSchema(true); domParser.setValidationSchemaFullChecking(true); domParser.setIdentityConstraintChecking(true); domParser.setExternalNoNamespaceSchemaLocation(schemaFilePath); domParser.setValidationScheme(XercesDOMParser::Val_Auto); domParser.parse(xmlFilePath); Note that DOMPrint also behaves similar way: ie, unless I set the validation scheme to Always it does not catch the unique constraints: $ DOMPrint -n -s -f author.xml <?xml version="1.0" encoding="UTF-8" standalone="no" ?><authors xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance"; xsi:noNamespaceSchemaLocation="author.xsd"> <author>tom</author> <author>tim</author> <author>tim</author> <lastmodified>2011-11-11</lastmodified> </authors> $ DOMPrint -v=always -n -s -f author.xml Error at file "/home/xml/author.xml", line 7, column 23 Message: element 'authors' declares duplicate identity constraint unique values Is this behaviour expected or have I missed something? What I was expecting is that if the xml document specifies an xsd and it can be found, and I have enabled all possible validation in the parser that Val_Auto should also catch the unique constraints.
