Roger Jennings describes ADO.NET's data service and client-side components, provides details on data formats, and walks you through creating a data service. He explains how to access data from a browser by composing URI queries and how to write ADO.NET Data Service clients for Windows or Web Forms. He also demonstrates Language Integrated Query (LINQ) to REST query syntax and data updates with POST, PUT, and DELETE methods. Finally, he outlines a potential "ADO.NET Data Service Offline" feature and explains how ADO.NET Data Services will relate to SSDS when Microsoft releases the service for general use in 2009.