Proceedings of the 20th International Conference of the Catalan Association for Artificial Intellig. Artificial intelligence in all its forms is increasingly interwoven into all our lives, and remains one of the most lively areas of discussion and interest in technology today.This book presents the proceedings of the 20th International Conference of the Catalan Association for Artificial Intelligence CCIA2017 Recent Advances in Artificial Intelligence Research and Development, held in Deltebre, Terres de lEbre, Spain, in October 2017. Despite its title, this annual conference is not only for researchers from the Catalan Countries, but is