You can download the first chapter for free from Addison-Wesley's intro book on DSL. If you are new to DSL's (Domain Specific Language) this this is a good read. Here is a abstract from the publisher:
Domain-Specific Languages (DSLs)–languages geared to specific vertical or horizontal areas of interest–are generating growing excitement from software engineers and architects. DSLs bring new agility to the creation and evolution of software, allowing selected design aspects to be expressed in terms much closer to the system requirements than standard program code, significantly reducing development costs in large-scale projects and product lines. In this breakthrough book, four leading experts reveal exactly how DSLs work, and how you can make the most of them in your environment.
With Domain-Specific Development with Visual Studio DSL Tools, you'll begin by mastering DSL concepts and techniques that apply to all platforms. Next, you'll discover how to create and use DSLs with the powerful new Microsoft DSL Tools–a toolset designed by this book's authors. Learn how the DSL Tools integrate into Visual Studio–and how to define DSLs and generate Visual Designers using Visual Studio's built-in modeling technology.
, you would have noticed that for the last couple of days it has been impossible to hit this site. The main reason for that being for the last 2-3 days 