SQL/XML Tutorial
Many developers need to be able to write applications that work for databases from multiple vendors. This SQL/XML Tutorial refers to SQL/XML, XQuery, and Native XML Programming Languages to do just that.
XML Schema Quality Checker
Use IBM's alphaWorks XML Schema Quality Checker to check the quality and style of your XML schema documents. Fully integrated with the Stylus Studio XML Schema Editor and XML validator.
DTD Editor
The Stylus Studio DTD Editor lets you visually develop Document Type Definitions (DTD) to structure XML documents. The DTD Editor also includes tools and utilites for validating XML against DTD's, converting DTD's, and generating DTD's.
XQuery Functions - User Defined Functions in XQuery
Dr. Michael Kay's tutorial entitled: 'Defining your own Functions in XQuery' explains how to write powerful User Defined Functions in XQuery.