CHAPTER Popescu-Belis_ELSEVIER_2009/IDIAP Managing Multimodal Data, Metadata and Annotations: Challenges and Solutions Popescu-Belis, Andrei Thiran, Jean-Philippe Ed. Marques, Ferran Ed. Bourlard, Hervé Ed. Multimodal Signal Processing for Human-Computer Interaction 2009 Elsevier / Academic Press London 183-203