Improved XML Validation with Schemas
by David Morris

A little over a year ago, I described how to validate XML documents with a document type definition, or DTD. At that point, the XML schema specification was new and few programmers were taking advantage of schemas for XML validation. The benefits of schemas over DTDs are clear, and now that XML schema support has stabilized, application programmers should start using them to validate XML data. READ MORE >

CODE/400 Command Shell
by Kevin Vandever

In my last article, "Debug iSeries Programs with the iSeries Distributed Debugger," I introduced you to the iSeries Distributed Debugger and briefly showed you how to interactively debug a program displayed in CODE/400. Before I move on to more advanced interactive debugging features, I want to get you more acquainted with the Command Shell feature that comes with CODE/400. This feature is associated with CODE/400 overall, not just the debugger, but it will certainly come in handy during the debugging process. READ MORE >

Reader Feedback and Insights

We value your feedback and insights. Feel free to send a letter to the editor. Letters may be printed, unless otherwise specified, and edited for clarity or length. READ MORE >

AS/400 Security: Enemies at the Gate

The iSeries and AS/400 may have a rock solid reputation for security, but, trust us, that isn't the end of the story. Vulnerabilities exist, and the OS/400 fortress is not impenetrable. Watch for the Guild Companies Special Report on AS/400 Security coming August 19. Articles by iSeries security experts such as Pat Botz, Jim Fey, John Earl, Dan Riehl, and Mike Grant--each is presenting security topics at the Fall COMMON Conference and Expo--will give you access to the latest and most useful information on this vital topic. Don't miss our special report and visit the COMMON Web site for information on the security educational focus and registration information for the upcoming conference in Orlando, Florida, September 7-11.