XPath Generator
Stylus Studio includes an XPath generator that helps you easily create XPath expressions. This page illustrates how you can accomplish this.
EDIFACT Reference
The EDIFACT Reference is a free developer resource providing the most in-depth information on EDIFACT constructs and data models.
XQuery API for Java (XQJ)
DataDirect XQuery is an embeddable software product based on the XQuery and XQJ standards that enables Java developers to access both relational and XML data sources using a single XQuery query. Runs on Oracle, SQL Server, DB2, and more!
XSL and XSLT Tools
XSLT tools in Stylus Studio let you easily edit, debug, design and profile XSLT stylesheets using a powerful and intuitive graphical user interface.