Windows validating parser software sax
In other words, it can tell you whether the document is valid.If validation is not activated, however, it can only tell whether or not the document is well-formed, as was shown in the previous section when you deleted the closing tag from an XML element.
For an XML document to be valid based on an XML schema, the XML document has to be validated against the XML schema.Two things must be understood about the validating parser: method on white space that it knows to be irrelevant.From the standpoint of an application that is interested in processing only the XML data, that is a good thing because the application is never bothered with white space that exists purely to make the XML file readable.The Xerces2-j parser may be obtained from the Xerces2-j page.Extract the Xerces-J-bin.2.5.0(for Windows) or Xerces-J-bin.2.5.0gz (for Unix) files to the installation directory of your choice.The Java XML implementation does so whenever the DTD makes it possible.
The program is configured to take additional arguments when it is started, which tell it to implement no validation, DTD validation, XML Schema Definition (XSD) validation, or XSD validation against a specific schema source file.
If the parser is not compliant with the JAXP spec, and therefore does not support XML Schema, it can throw a , which stands for XML Schema instance.
The second line specifies the schema to use for elements in the document that do not have a namespace prefix, namely for the elements that are typically defined in any simple, uncomplicated XML document.
To be notified of validation errors in an XML document, the parser factory must be configured to create a validating parser, as shown in the preceding section.
In addition, the following must be true: Note - The parser factory must be configured to generate a parser that is namespace-aware as well as validating. More information about namespaces is provided in Document Object Model but for now, understand that schema validation is a namespace-oriented process.
Note - More information about namespaces is included in Validating with XML Schema in Document Object Model.