OCEL 2.0 Specification (RWTH Aachen, 2023)

Technical specification document for the Object-Centric Event Log (OCEL) 2.0 standard. Led by entities/wil-van-der-aalst's Chair of Process and Data Science at RWTH Aachen.

Why it matters for PPM

OCEL formalises the object-centric data representation that Object-Centric Process Mining (OCPM) operates over. Most PPM literature to date uses XES (case-centric), but the object-centric view is richer — cases can share objects, and prediction can be formulated per-object rather than per-case. Emerging PPM work is beginning to adopt OCEL (cited in sources/2026-calvanese-agentic-bpm-manifesto indirectly via process-mining references).

Structure

Metamodel of events, objects, event-to-object (E2O) relationships, object-to-object (O2O) relationships, with qualifiers.
Three exchange formats: relational (SQLite), XML, JSON — each with a validation schema.

Connections

Concepts: methods/process-mining-basics · concepts/predictive-process-monitoring Authors: entities/wil-van-der-aalst