In 2001, Swartz joined the RDFCore working group at the World Wide Web Consortium (W3C), where he authored RFC 3870, Application/RDF+XML Media Type Registration.
Në vitin 2001, Swartz u bashkua me grupin punues të RDFCore në World Wide Web Consortium (W3C), ku ai ishte autor i RFC 3870, Application/RDF+XML Media Type Registration.