This article presents how semantic web technologies have been applied for enriching existing contents within the SEMUSICI project. The SEMUSICI project has the goal of researching on how semantic web technologies can be applied to digital libraries, and how this can improve searchability and accessibility. The project takes the results from the eContent project HARMOS, which defined a musical taxonomy for cataloguing master classes, and proposes a methodology for evolving this taxonomy into an ontology, and migrating the contents accordingly.