The aim of the workshop is to bring together researchers, established and new, interested in bidirectional transformations from different perspectives, such as: language-based approaches, software/model transformations, data/schema co-evolution. Bidirectional transformations (bx) are a mechanism for maintaining the consistency of at least two related sources of information. Such sources can be databases, software models, documents, graphs, and trees. The methodologies used range from classical program transformation to graph transformation techniques, from ad-hoc techniques for data synchronization to the development of domain-specific languages. Perdita Stevens (University of Edinburgh, UK) James Terwilliger (Microsoft, USA) Dates: Sunday March 17th, 2013