Namespaces have been introduced to XML after the first specification of XML had received the official W3C Recommendation status.
This is the reason why (most of the) XML parser implementations do not support XML Namespaces by default, to handle the validation of XML documents with namespaces correctly it is therefore necessary to configure the underlying parsers to provide support for XML Namespaces.
Many Java XML APIs provide mechanisms to validate XML documents, the JAXP API can be used for most of these XML APIs but subtle configuration differences exists.
This article shows five ways of how to configure different Java APIs (including DOM, SAX, dom4j and XOM) using JAXP 1.3 for checking and validating XML with DTD and Schema(s).
Transformer Exception When the serialization failed */ public void serialize(String path To File) throws Parser Configuration Exception, Transformer Configuration Exception, IOException, Transformer Exception /** * actually serializes the list to the file denoted by path To File * @param path To File the path to the xml file to serialize to. Transformer Configuration Exception When the serialization failed * @throws
IOException When the serialization failed * @throws transform.
* @return A DOM Object containing a parsed XML document or a null value ifthere is an error in parsing. * @throws Exception if parser can not be constructed or source is not a valid XML document.
* @throws Parser Configuration Exception * @throws IOException * @throws SAXException */ private static Document get DOMObject(String filename,boolean validating) throws SAXException, IOException, Parser Configuration Exception /** * Read a classpath resource and return as an XML DOM Document. The specified path can berelative to the test class' location on the classpath. */ public Document read Resource Document(String path) /** * Parses the string as the body of an XML document and returns the document element. */ private Document parse(final String source) throws Exception /** * Return true is the WSDl version is 2.0, false othervise * @param xml Source The WSDL File to check * @return True if the document version is 2.0, false otherwise * @throws Exception If a problem occurs */ private boolean is Wsdl2(String xml Source) throws Exception /** * Loads XML files from disk * @param clazz the class this method is invoked from * @param xml Path the full path to the file to load * @param xsd Path the full path to the file to validate against */ public static Document load Doc(Class clazz, String xml Path, String xsd Path) /** * Parses the specified input stream and returns a list of the regions declared in it.
When warnings/errors/fatal errors are found by the validator, the parser must handle them as if those errors were found by the parser itself.
In other words, if the user-specified is set, it must receive those errors, and if not, they must be treated according to the implementation specific default error handling rules.
) as defined below has been used in the code examples to validate the input document.
The input document contains an extra attribute which has not been defined in the XML Schema, this shows that the XML Schema has been used for the validation.
Turning on both of these options simultaneously will cause either redundant behavior or error conditions.