Is it bidirectional? I.e. given: dc:creator owl:equivalentProperty vra:creator . does ?x vra:creator :foo match statements like ?x dc:creator :foo Nope. From the point of view of the output side of the transformation the subject of the owl:equvalentProperty is replaced by the object; so there aren't any dc:creators at all in the data the as seen from the output side. ----