Invited Papers -- Inductive Expansion and Nonmonotonic Reasoning -- The Basic Dynamic Doxastic Logic of AGM -- Shielded Contraction -- A Computational Model for Belief Change and Fusing Ordered Belief Bases -- Contributed Papers -- An Operational Measure of Similarity Based on Change -- Toward a Formalization of Elaboration Tolerance: Adding and Deleting Axioms -- Assessing the Minimality of Change in Belief Revision: Capacities -- A Minimal Modelling for Successful Knowledge Base Revision -- Contraction of Epistemic States: A General Theory -- Two Notions of Epistemic Entrenchment -- Five Faces of Recovery -- Iterable AGM Functions -- Iterated Revision Operations Stemming from the History of an Agent's Observations -- On a Full Meet Base Revision that Satisfies the Categorial Matching Principle -- Revision and Update Based on Stratified Forward Chaining -- Defeasible Inheritance and Reference Classes -- On Structured Belief Bases -- Iterated Syntax-based Revision in a Nonmonotonic Setting -- Revising and Updating Probabilistic Beliefs -- Bayesian Cognitive Diagnosis in Believable Multiagent Systems -- Revising Beliefs Received from Multiple Sources.