If you have followed the RS 2005 roadmap, you have undoubtedly noticed that among the many new features in Microsoft Reporting Services 2005 is one that can truly help reduce the workload for developers—the ability to give end users the power to generate their own ad-hoc reports. My article explains the major components of Microsoft Reporting Services' ad-hoc architecture and semantic model, and walks you through an end-to-end example that demonstrates how to author, manage, and deliver ad-hoc reports.