What helps #Wikidata's data actually mean something? 🕸️ The ontology — a structure of classes, instances, and relationships underneath it all. At #WikiProjectsDays2026, Peter F. Patel-Schneider explains what needs attention in "WikiProject Ontology Needs You" — and how you can help. 📅 June 19–21, online. Register for access: 🔗 Program: https://www.wikidata.org/wiki/Event:WikiProjects_Days_2026#Sessions