This book constitutes the refereed proceedings of the 15th International Semantic Web
Conference ESWC 2018 held in Heraklion Crete Greece. The 48 revised full papers presented
were carefully reviewed and selected from 179 submissions. The papers cover a large range of
topics such as logical modelling and reasoning natural language processing databases and data
storage and access machine learning distributed systems information retrieval and data
mining social networks and Web science and Web engineering.
