The complexity of software code is the result of the intermingling of domain knowledge with implementation information. Generative Programming and Domain Specific Languages are known techniques for factoring and reducing the total complexity. The Domain Workbench that Intentional Software Corporation is developing makes the definition, creation, editing, combination, extension, and processing of DSL’s more practical. Key features of the Domain Workbench are the uniform representation of multiple interrelated domains, the ability to project the domains in multiple editable notations, and direct access to the domain code by a program generator. From the Series:CSE Colloquia - 2008