The System Definition Model (SDM) SDK Workbench tools workbench (http://lab.msdn.microsoft.com/teamsystem/workshop/sdm) is now available. As a core piece of the Dynamic Systems Initiative (DSI), SDM is the underlying data model for the Distributed System Designers in Visual Studio 2005 Team Architect. The designers are used to model and validate distributed applications for deployment into logical datacenter configurations. This workbench supports the SDM SDK, which includes a set of tools, documentation, and samples for creating SDM models, and extending the models that are included with the Distributed System Designers, to support the creation of application system and datacenter models. The SDM SDK is a part of the Visual Studio 2005 SDK.