The purpose of the OCEL standard is to provide a general standard to interchange object-centric event data with multiple case notions. We set the following goals for the standard: Interoperability: with the provision of the OCEL standard and JSON/XML serializations of OCEL, we want to support a widespread collection of languages and systems. Generalization: the standard supports the storage of events, objects, and their attributes. Furthermore, the standard can be extended. Provision of a collection of examples: example logs, extracted from information systems supporting some widespread business processes, are provided for the OCEL standard. Tool/Library Support: to support the implementation of OCEL in custom applications, tool/library support shall be provided.