Do not use this relation directly. It is intended as a grouping for a diverse set of relations, all involving cause and effect.

http://purl.obolibrary.org/obo/ro/docs/causal-relations

The intent is that the process branch of the causal property hierarchy is primary (causal relations hold between occurrents/processes), and that the material branch is defined in terms of the process branch

http://purl.obolibrary.org/obo/ro.owl

Chris Mungall