Renku uses PROV-O and its own Renku ontology to represent workflows.
renku.domain_model.workflow.plan
renku.domain_model.workflow.composite_plan
renku.domain_model.workflow.parameter
renku.domain_model.workflow.workflow_file
Renku allows conversion of tracked workflows to runnable workflows in supported tools (Currently CWL)
renku.core.workflow.converters.cwl
CWLExporter