Computer technology has become an essential part of all our lives, and the legal profession is no exception. For more than 25 years, the annual JURIX conference has provided an international forum for academics and practitioners working at the cutting edge of research into and the application of the interface between law and computer technologies. This book presents the proceedings of the 28th International Conference on Legal Knowledge and Information Systems (JURIX 2015), which took place in Braga, Portugal in December 2015. The book contains 14 full papers, nine short papers and nine posters delivered at the conference. These address a wide range of topics in legal informatics, and fall into three main subject areas: theory and foundations of AI and law, focusing on themes such as argumentation, reasoning, and evidence; technology of AI and law, which presents technological advancements and solutions; and applications of AI and law, describing implementations of AI and law technology in real world systems. The book offers an overview of the ways in which current information technology is relevant to the practice of law, and will be of interest to all those whose work involves legal theory, argumentation and practice.