-- Using Answer Set Programming for Integrity Maintenance in a Smart Home System. -- Collaborative Benchmarking Rule-Reasoners with B-Runner. -- Rule Confidence Aggregation for Knowledge Graph Completion. -- RIFF: Inducing Rules for Fraud Detection from Decision Trees. -- Ontology-Based Update in Virtual Knowledge Graphs via Schema Mapping Recovery. -- Reevaluation of Inductive Link Prediction. -- Judicial Explanations. -- OntoRaster: Extending VKGs with Raster Data. -- Complete Approximations of Incomplete Queries. -- Reasoning in Rough Description Logics with Multiple Indiscernibility Relations. -- A Benchmark for Rule Induction in Automated Business Decisions. -- Revising Defeasible Theories via Instructions. -- FaithEL: Strongly Faithful Knowledge Base Embeddings for ELH. -- RDF Surfaces as a First-Order language for the Semantic Web. -- Ambiguities in Defeasible Logic: A computational efficient framework and algorithms. -- Legally-Guided Automated Decision-Making System Using Language Model Agents for Autonomous Driving.

This book constitutes the proceedings of the 8th International Joint Conference on Rules and Reasoning, RuleML+RR 2024, held in Bucharest, Romania, during September 16-18, 2024. The 12 full papers and 4 short papers included in this book were carefully reviewed and selected from 35 submissions. The RuleML+RR symposia were devoted to disseminating research, applications, languages, and standards for rule technologies, with attention to both theoretical and practical developments, to challenging new ideas and to industrial applications.