Editing WoW:UI XML tutorial (section)

== Validation with XSD ==

If you use the Blizzard Interface Customization tool to extract the contents of the Interface\FrameXML folder, you will come across the file UI.xsd which provides a schema definition for automated validation of your customized XML-files. Notice that [http://www.w3.org/XML/Schema XSD] is an advanced XML feature and requires a special editor as well as a good knowledge of advanced XML-concepts. If you've already worked with XML you might find this very helpful to get started with WoW.

There is also an [http://dev.averageurl.com/wow/xml/ online validator] available, which will take any XML you throw at it and check it against Blizzard's schema definitions. Unfortunately, it is not much use as a "getting started" reference, but rather it is much more useful to check what is going wrong should you lack access to the heavier tools that support XML editing with XSD support natively. Further, due to the way that the XSD was designed, it can some times throw errors which are not actually a problem. Be sure to check the [http://dev.averageurl.com/wow/xml/faq/ FAQ] for more information.