This book constitutes the proceedings of the 18th International System Design Language Forum
SDL 2017 held in Budapest Hungary in October 2017. The 10 full papers presented in this
volume were carefully reviewed and selected from 17 submissions. The selected papers cover a
wide spectrum of topics related to system design languages ranging from the system design
language usage to UML and GRL models model-driven engineering of database queries network
service design and regression testing and modeling for Internet of Things (IoT) data
processing.