Domain Inheritance Scaling Agility using Domain Inheritance Overview Concept Idioms Demo Concept Some context The (meta-) model Some Context Aspect Orientation Subject Orientation Component Based Development Service Oriented Architecture Subject Oriented Programming Aspect Oriented Programming Component Based Development Domain Driven Design Service Oriented Architecture Concept State Add Object Types Add Relation Types Add Inheritance relationships Add Namespaces Behavior Domain overrides (public/private domain methods) The (meta) model Idioms 3 rd Generation OO Modeling Multiple Type Declarations Raw, Cooked or Half Baked Objects (Against Design by Contract) Naked Objects and UI Abstract Factory 3 rd Generation Object Oriented Programming (OOP) Can be seen as a evolution from 1 st Generation OOP (Inheritance) 2 nd Generation OOP (Delegation) 1 st Generation OOP 2 nd Generation OOP 3 rd Generation OO Multiple Type Declarations Muldecs Implementation in Allors Design By Contract (is evil) Class invariants using Pre- and Post conditions Half Baked Objects Naked Objects UI Abstract Factory Questions?