ECO (Enterprise Core Objects), is a software framework suited for Domain-Driven-Design (DDD) from Capable Objects AB, designed to increase productivity by utilizing facilities such as Object-relational mapping (ORM) for persisting domain objects, UML models for domain classes and executable State Machines for behavior control defined in UML notation. The ECO framework is intended to be an all-in-one solution for enterprise development and includes in-memory transactions and Undo/Redo functionality as well as easy binding with UI layer. ECO unites ORM framework and UML modeling tools with instant code generation and an OCL expression evaluator for simplified in-memory and DB queries, business rules and other useful facilities. ECO5 is targeted to .NET Framework and is only available for development environment Visual Studio. Users of RAD Studio can still download ECO4.