This tutorial volume includes revised and extended lecture notes of six long tutorials, five short tutorials, and one peer-reviewed participant contribution held at the 4th International Summer School on Generative and Transformational Techniques in Software Engineering, GTTSE 2011.

Compilation of Legacy Languages in the 21st Century.- Variation Programming with the Choice Calculus.- Leveraging Static Analysis in an IDE.- Differencing UML Models: A Domain-Specific vs. a Domain-Agnostic Method.- Model Management in the Wild.- Bidirectional by Necessity: Data Persistence and Adaptability for Evolving Application Development.- Requirements for Self-adaptation.- Dynamic Program Analysis for Database Reverse Engineering.- Model-Based Language Engineering with EMFText.- Feature-Oriented Software Development: A Short Tutorial on Feature-Oriented Programming, Virtual Separation of Concerns, and Variability-Aware Analysis.- Language and IDE Modularization and Composition with MPS.- Tengi Interfaces for Tracing between Heterogeneous Components.

This tutorial volume includes revised and extended lecture notes of six long tutorials, five short tutorials, and one peer-reviewed participant contribution held at the 4th International Summer School on Generative and Transformational Techniques in Software Engineering, GTTSE 2011. The school presents the state of the art in software languagae engineering and generative and transformational techniques in software engineering with coverage of foundations, methods, tools, and case studies.