This ontology defines the classes and properties introduced by the EU-funded project DE-BIAS - Detecting and cur(at)ing harmful language in cultural heritage collections (2023/2024) for the DE-BIAS Vocabulary. More information about the vocabulary and the complete application profile can be found on the project website: https://pro.europeana.eu/page/the-de-bias-vocabulary. This ontology is based on the Words Matter Knowledge Graph by Cultural AI.