Used correctly, XML Schema validation can dramatically reduce the effort necessary to perform basic data validation tasks. Additionally, validation rules that are centrally located in an XML schema can help users to better understand your system. It takes the right XML structure, however, to leverage a schema validator. This article discusses proper XML structure as well as best and worst practices for defining data validation rules in XML Schema.
How do you keep invalid data from getting into your system? Should you hand-code validation routines that perform bounds checking? With the XML entry points into your system, XML Schema validators can save you an incredible amount of time in this area. This goes for DTD validators as well as those for XML Schema.
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