While query expansion is a well-known technique [3] and many modern IR systems already support it using thesauri such as WordNet, existing approaches do not yet take into account existing Web-based vocabularies and are not tai- lored to the specifics of SKOS, which distinguishes between the notion of URI identifiable concepts and associated terms. We propose a more general term expansion technique that supports label- and URI-based term expansion at query or document indexing-time. Our contributions are: