Validating a document's constraints, and providing this meaning to one or more XML documents, can be achieved easily by using SAX, the Simple API for XML (see Related topics).
In XML parsers, validation is usually turned off by default because many XML authors are not writing constraints; leaving it off helps to avoid lengthy processing in production environments.
When using this XML Schema to validate the input XML document, the following error gets reported: ) as defined below has been used in the code examples to validate the input document.
uses the non-validating parser by default, but it can also activate validation.
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.
Namespaces have been introduced to XML after the first specification of XML had received the official W3C Recommendation status.