Lorenzo Bettini is an associate professor in computer science at the Dipartimento di Statistica, Informatica, Applicazioni "Giuseppe Parenti," Università di Firenze, Italy. Previously, he was a researcher in computer science at Dipartimento di Informatica, Università di Torino, Italy. He also was a Postdoc and a contractual researcher at Dipartimento di Sistemi e Informatica, Università di Firenze, Italy. He has a masters degree summa cum laude in computer science and a PhD in "Logics and Theoretical Computer Science." His research interests cover design, theory, and the implementation of programming languages (in particular, object-oriented languages and network-aware languages). He has been using Xtext since version 0.7. He has used Xtext and Xtend for implementing many domain-specific languages and Java-like programming languages. He also contributed to Xtext, and he recently became an Xtext committer. He is the author of the first edition of the book "Implementing Domain-Specific Languages with Xtext and Xtend", published by Packt Publishing (August 21, 2013). He is also the author of about 80 papers published in international conferences and international journals. You can contact him at http://www.lorenzobettini.it.