This demo will show a practical approach to interoperability between RDF and Topic Maps, based on the RTM vocabulary for mapping RDF data to Topic Maps. The demo will use the freely downloadable (registration required) Omnigator topic map browser. We will take an RDF file containing RDF data in the FOAF vocabulary and show how this can be converted to a topic map, then browse the topic map to see how it is structured, and finally convert it back to RDF. We will also allow users to bring their own RDF data, which we will attempt to convert to topic maps using the same approach.