As an XML developer you should make it a huge priority to develop XML documents that are 100% error free. Fortunately, schemas (DTDs and XSDs) make it possible to assess the validity of XML documents. This tutorial shows you how to use various tools to validate documents against a DTD or XSD.
In this tutorial, you'll learn
The ins and outs of document validation
The basics of validation tools and how to use them
How to assess and repair invalid XML documents