This book constitutes the proceedings of the 21st International Conference on Discovery Science
DS 2018 held in Limassol Cyprus in October 2018 co-located with the International Symposium
on Methodologies for Intelligent Systems ISMIS 2018. The 30 full papers presented together
with 5 abstracts of invited talks in this volume were carefully reviewed and selected from 71
submissions. The scope of the conference includes the development and analysis of methods for
discovering scientific knowledge coming from machine learning data mining intelligent data
analysis big data analysis as well as their application in various scientific domains. The
papers are organized in the following topical sections: Classification meta-learning
reinforcement learning streams and time series subgroup and subgraph discovery text mining
and applications.
