OPMW is an ontology for describing workflows based on the Open Provenance Model. It has been designed as a profile for OPM, extending and reusing OPM's core ontologies OPMV (OPM-Vocabulary) and OPMO (OPM-Ontology). Since the publication of the PROV-O standard, the ontology also extends the W3C recommendation. The OPMW profile was originally created as an extension of OPM to represent abstract workflows in addition to workflow execution traces. This requirement was motivated by the goal of publishing workflows of scientific articles.