New Trends in Database and Information Systems

This book constitutes short papers, demonstration papers, Doctoral Consortium School papers and workshop papers which were presented at the 30th European Conference on Advances in Databases and Information Systems, ADBIS 2026, which took place in Orléans, France, during September 28–October 1, 2026. They were carefully reviewed and selected for inclusion in this book.A total of 18 short papers and 5 demonstration papers from the main conference are included in these proceedings, together with 4 Doctoral Consortium School papers and 13 workshop papers.They were organized in the following topical sections: Similarity, topic modeling and knowledge graphs; Knowledge graphs, text-to-SQL and metadata extraction; Sustainability, privacy workflows and clinical analytics; Similarity search, truth discovery and anomaly detection; demos; Doctoral Consortium School; DEI4Teach: Diversity, Equity and Inclusion for Teaching Advanced Databases and Information Systems; MADEISD 2026: 8th Workshop on Modern Approaches in Data Engineering and Information System Design; FEHDA 2026: 2nd International Workshop on Fairness Exploration in Heterogeneous Data and Algorithms; and ERGA 2026: 2nd International Workshop on Entity Resolution and Graph Alignment.