The DRK (Datenraum Kultur/Cultural Data Space) Ontology is a semantic framework developed as part of the Datenraum Kultur project at Fraunhofer FIT. It is designed for modeling, interconnecting, and discovering cultural data with a focus on theatrical productions and events. The ontology provides an extensible set of concepts, properties, and relationships that enable precise semantic representation of theaters, productions, performances, and their associated metadata. The ontology supports multilingual descriptions (currently in English and German) and imports specialized vocabularies for character types, performer types, theatrical event and production types, accessibility profiles, ISO language codes, and theatrical genres. This comprehensive approach enables interoperability across cultural data sources while maintaining rich semantic context. Version 1.0.1 builds upon the foundation established in version 1.0.0, offering a stable semantic framework for cultural institutions, researchers, and developers working with theater and performance data. The ontology facilitates data integration across diverse cultural repositories while preserving the nuanced relationships between cultural entities. Published by Fraunhofer Institute for Applied Information Technology (FIT), this ontology serves as a cornerstone of the Datenraum Kultur project, which aims to create a standardized approach to cultural data representation and exchange in the German cultural sector. For more information about the project, visit: Datenraum Kultur/Cultural Data Space project