http://www.w3.org/ns/oa#hasBody
http://www.w3.org/ns/oa#hasTarget
http://www.w3.org/ns/oa#motivatedBy
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
[inverse property] http://purl.org/dc/terms/relation
[inverse property] http://purl.org/vocab/frbr/core#translationOf