In addition to bug fixes, I want to note a change in functionality. In previous versions, casting a rdfDict to a string returned it’s RDF subject. This is no longer the case. str now returns a contrived string representation of the current instance, based (very) loosely on the Dublin Core Dumb-down Algorithm . If someone has a suggestion or better implementation, I welcome it. You can still access the RDF subject using the subject attribute or the new about method.