We present the user-centered, iterative design of Mobile Facets, a mo-bile application for the faceted search and exploration of a large, multi-dimensional data set of social media on a touchscreen mobile phone. Mo-bile Facets provides retrieval of resources such as places, persons,...

With the Multimedia Metadata Ontology (M3O), we havedeveloped a sophisticated model for representing among others the annotation,decomposition, and provenance of multimedia metadata. Thegoal of the M3O is to integrate the existing metadata standards andmetadata formats rather than replacing...