Sirius is an Eclipse project which allows you to easily create your own graphical modelling workbench by leveraging the Eclipse Modeling technologies. It provides a generic workbench for model-based architecture engineering that could be easily tailored to fit specific needs. It enables the specification of a modeling workbench in terms of graphical, table, or tree editors with validation rules and actions using declarative descriptions. All shape characteristics and behaviors can be easily configured. No code generation is involved. Once completed, the modeling workbench can be deployed as a standard Eclipse plugin.