Working with XML document using java requires you to follow certain coding practices so that your program does what it is intended for. Validation of an XML document that is worked upon is necessary in most of the applications.

When you validate an XML document you must make sure that the errors in the XML document are registered with the error handler. Using an XML schema is the better way to validate an XML document.

In most of the XML document the schema that is referred to is found in the XML document itself. Such methods are risky. Hence it is better to reference the schema from the program itself.

If you use the schema reference from the XML file, chances are there that the file might refer to an incorrect schema that is needed in your program. But the validation would pass through for the XML file, but this kind of validation is not needed.

So set the schema source through the schema property in the document namespace in the program itself. This is the better way to deal with validation of the XML document. Similarly there are many other coding practices that need to be taken care of while using JAXP.

A simple search would reveal a lot of information on coding practices and you can find some of them in the URL, http://www.ibm.com/developerworks/xml/library/x-wxxm32.html.

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