Interactive multimedia performances are rapidly gaining ground within performing arts communities nowadays, mainly due to breakthroughs in humancomputer interaction technologies, such as human motion capture and analysis. This has brought forward the issue of digital preservation of these performances, so that they can be reconstructed in the future. This paper presents an ontology-driven approach to the digital preservation of interactive multimedia performances. An ontology model is proposed for describing the complex relationships amongst different components of a performance, as well as their temporal aspects and evolution over time.