This book constitutes the refereed proceedings of the 9th International Conference on Model Transformation, ICMT 2016, held in Vienna, Austria, in July 2016, as Part of STAF 2015, the federation of a number of the leading conferences on software technologies.

A Domain Specific Transformation Language to Bridge Concrete and Abstract Syntax.- Model Transformation with Immutable Data.- EMG: A Domain-Specific Transformation Language for Synthetic Model Generation.- Translatability and Translation of Updated Views in Model Join.- Using ATL Transformation Services in the MDEForge Collaborative Modeling Platform.- Search-Based Model Transformations with MOMoT.- Extending Model Synchronization Results from Triple Graph Grammars to Multiple Models.- Correct Reuse of Transformations is Hard to Guarantee.- Requirements Engineering in Model-Transformation Development: An Interview-Based Study.- GECO: A Generator Composition Approach for Aspect-Oriented DSLs.- Industrial Software Rejuvenation Using Open-Source Parsers.- Automatically Deriving the Specification of Model Editing Operations from Meta-Models.- Clone Detection for Graph-Based Model Transformation Languages.