SEPIO is defining SEPIO defining several dc properties as DPs, causing illegal punning when integrating with other ontologies.
see also information-artifact-ontology/ontology-metadata#90 for a lengthy discussion why that is a problem.

Before we get into the details on how to fix this: @mbrush (or anyone else), what are the use cases for all of these different date properties? Whould it be a problem to redefine them as annotation properties?