How to align media metadata schemas ? Design and implementation of the media ontology

Multimedia data is generated, shared, stored and distributed worldwide at an ever increasing rate. This huge amount of content comes with metadata represented in different formats which hardly interoperate although they partially overlap. The W3C Media Annotations Working Group is chartered to recommend a Media Ontology compatible with most of these schemas. In this paper, we present the process for modeling this ontology and we discuss various approaches for explicitly representing the mappings between the core set of annotation properties defined in the Media Ontology and some major deployed metadata standards. We highlight the benefits and drawbacks of each approach and conclude on future work for the implementation of the Media Ontology.