Invited Papers -- Choice Procedures in Pairwise Comparison Multiple-Attribute Decision Making Methods -- Kleene Algebra with Relations -- Contributed Papers -- Integrating Model Checking and Theorem Proving for Relational Reasoning -- Fixed-Point Characterisation of Winning Strategies in Impartial Games -- Checking the Shape Safety of Pointer Manipulations -- Applying Relational Algebra in 3D Graphical Software Design -- Investigating Discrete Controllability with Kleene Algebra -- Tracing Relations Probabilistically -- Pointer Kleene Algebra -- Kleene Modules -- The Categories of Kleene Algebras, Action Algebras and Action Lattices Are Related by Adjunctions -- Towards a Formalisation of Relational Database Theory in Constructive Type Theory -- SCAN Is Complete for All Sahlqvist Formulae -- Relations and GUHA-Style Data Mining II -- A Note on Complex Algebras of Semigroups -- Calculational Relation-Algebraic Proofs in Isabelle/Isar -- A Calculus of Typed Relations -- Greedy-Like Algorithms in Modal Kleene Algebra -- Rasiowa-Sikorski Style Relational Elementary Set Theory -- Relational Data Analysis -- Two Proof Systems for Peirce Algebras -- An Institution Isomorphism for Planar Graph Colouring -- Decomposing Relations into Orderings.