Using a Standards-based Approach for a Multimedia Knowledge-base

In recent years, we witnessed the diffusion and rise in popularity of software platforms for User Generated Content management, especially multimedia objects. These platforms handle a big quantity of unclassified information. UGC sites (i.e. YouTube and Flickr) do not force the users to perform classification operations and metadata definitions, leaving space to a logic of free-tags (Folksonomies). In the context of an industrial project financed by the Autonomous Region of Sardinia, the idea of producing a Geolocalized Guide based on a Knowledge-base came forth. Such Guide would be able to share georeferenced content with their users, originated from UGC sources as well as from users themselves. For this purpose, we defined an ontology that can represent the semantics of multimedia content, especially its metadata, which in turn can be given an unambiguous meaning. The innovation in this work is represented by the use of the Adobe XMP, DUBLIN CORE, EXIF, IPTC standards as a starting point. In order to unify metadata coming from different sources we defined all laws of mapping toward a structure defined by sources like YouTube and

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