Best Practices to Model Business Services in Complex IT Environments -- Drools: A Rule Engine for Complex Event Processing -- Graph Transformation Concepts for Meta-model Evolution Guaranteeing Permanent Type Conformance throughout Model Migration -- A Graph Transformation-Based Semantics for Deep Metamodelling -- Reusable Graph Transformation Templates -- Towards an Automated 3D Reconstruction of Plant Architecture.- Generating Graph Transformation Rules from AML/GT State Machine Diagrams for Building Animated Model Editors -- AGG 2.0 – New Features for Specifying and Analyzing Algebraic Graph Transformations -- Integration of a Pattern-Based Layout Engine into Diagram Editors -- Tool Demonstration of the Transformation Judge -- Knowledge-Based Graph Exploration Analysis.- Graph Grammar Induction as a Parser-Controlled Heuristic Search Process.- Planning Self-adaption with Graph Transformations -- From Graph Transformation Units via MiniSat to GrGen.NET -- Locality in Reasoning about Graph Transformations -- Contextual Hyperedge Replacement -- The Added Value of Programmed Graph Transformations – A Case Study from Software Configuration Management -- A Case Study Based Comparison of ATL and SDM -- Applying Advanced TGG Concepts for a Complex Transformation of Sequence Diagram Specifications to Timed Game Automata -- Automatic Conformance Testing of Optimized Triple Graph Grammar Implementations. Drools: A Rule Engine for Complex Event Processing -- Graph Transformation Concepts for Meta-model Evolution Guaranteeing Permanent Type Conformance throughout Model Migration -- A Graph Transformation-Based Semantics for Deep Metamodelling -- Reusable Graph Transformation Templates -- Towards an Automated 3D Reconstruction of Plant Architecture.- Generating Graph Transformation Rules from AML/GT State Machine Diagrams for Building Animated Model Editors -- AGG 2.0 – New Features for Specifying and Analyzing Algebraic Graph Transformations -- Integration of a Pattern-Based Layout Engine into Diagram Editors -- Tool Demonstration of the Transformation Judge -- Knowledge-Based Graph Exploration Analysis.- Graph Grammar Induction as a Parser-Controlled Heuristic Search Process.- Planning Self-adaption with Graph Transformations -- From Graph Transformation Units via MiniSat to GrGen.NET -- Locality in Reasoning about Graph Transformations -- Contextual Hyperedge Replacement -- The Added Value of Programmed Graph Transformations – A Case Study from Software Configuration Management -- A Case Study Based Comparison of ATL and SDM -- Applying Advanced TGG Concepts for a Complex Transformation of Sequence Diagram Specifications to Timed Game Automata -- Automatic Conformance Testing of Optimized Triple Graph Grammar Implementations.

This book constitutes the thoroughly refereed post-conference proceedings of the 4th International Symposium on Applications of Graph Transformations, AGTIVE 2011, held in Budapest, Hungary, in October 2011. The 13 revised full papers presented together with 2 invited talks, 2 application reports, and 3 tool demonstration papers were carefully selected from 36 submissions during two rounds of reviewing and improvement. The papers are organized in topical sections on invited talk abstracts, model-driven engineering, graph transformation applications, tool demonstrations, graph transformation exploration techniques, graph transformation semantics and reasoning, application reports and bidirectional transformations.