This book constitutes the thoroughly refereed post-proceedings of the 21st International
Conference on Inductive Logic Programming ILP 2011 held in Windsor Great Park UK in July
August 2011. The 24 revised full papers were carefully reviewed and selected from 66
submissions. Also included are five extended abstracts and three invited talks. The papers
represent the diversity and vitality in present ILP research including ILP theory
implementations probabilistic ILP biological applications sub-group discovery grammatical
inference relational kernels learning of Petri nets spatial learning graph-based learning
and learning of action models.
