Semantic Web applications tests show that their usability is seriously compromised. This motivates the exploration of alternative interaction paradigms, different from the \"traditional\" Web or desktop applications ones. The Rhizomer platform is based on the object-action interaction paradigm, which is better suited for heterogeneous resource spaces such as those common in the Semantic Web. Resources, described by means of RDF metadata, correspond to the objects from the interaction point of view and Rhizomer provides browsing mechanisms for them. Semantic web services, dynamically associated to these objects, correspond to the actions. Rhizomer has been applied in the context of a media house to build an audiovisual content management system. End-users of this system, journalists and archivists, are able to navigate the content repository through semantic metadata describing content pieces and the domain knowledge these pieces are referring to. Those resources constitute the objects to which, when the user selects one of them, semantic web services dynamically associate specialized visualization and interaction views, the actions.

1. A Platform for Object-Action Semantic Web Interaction Roberto García, Juan Manuel Gimeno, Ferran Perdrix*, Rosa Gil, Marta Oliva HCI and Data Integration Research Group Universitat de Lleida, Spain *Segre Media, Spain

17. S5T Project: browse Rhizomer Semantic Content Management System RDF2HTML GET  RDF2HTML <s5t:Audio rdf:about=&quot; http://www.segre.com/audio/20070323-bm.mp3 &quot;> <dc:title>Butlletí Migdia</dc:title> <dc:date>2007-03-23</dc:date> <s5t:genre rdf:resource=&quot;&srs;11000000&quot;/> <s5t:transcriptResource> http://www.segre.com/audio/20070323-bm.xml </s5t:transcriptResource> </srt:Audio> http://www.segre.com/ audio/ 20070323-bm.mp3 a Audio title Butlletí Migdia date 2007-03-23 genre politics transcript http://www.segre.com/audio/20070323-bm.xml Referrers http://rhizomik.net/.../NewsCodes-SubjectsOnto#11000000 a Subject label politics description Local, regional, national and international exercise of power, or struggle for power, and the relationships between governing bodies and states. Referrers

18. S5T Project: edition Rhizomer Semantic Content Management System edit – del – new http://www.segre.com/ audio/ 20070323-bm.mp3 a Audio title Butlletí Migdia date 2007-03-23 genre politics transcript http://www.segre.com/audio/20070323-bm.xml Referrers

24. S5T Project: interaction Rhizomer Semantic Content Management System Butlletí Migdia (23/03/2007) La mobilització en contra dels transgènics i en favor de Josep Pàmies també ha servit per introduir altres reclamacions. En aquest cas, alguns dels col·lectius de la lluita contra aquests cultius demanen que la Universitat de Lleida rebi una especialització en Agricultura Ecològica . Asseguren que serien uns estudis pioners que servirien al centre per recuperar prestigi. Search Keyword Browse Term Search Keyword : describe resources whose transcript contains keyword… Browse Term : describe the concept annotating the keyword http://www.segre.com/ audio/ 20070323-bm.mp3 a Audio title Butlletí Migdia date 2007-03-23 genre politics transcript http://www.segre.com/audio/20070323-bm.xml Play Referrers http://www.udl.cat a University label Universitat de Lleida lat 41.37 long 0.37 Map Referrers

29. Thank you for your attention More: http:// rhizomik.net Roberto García http://rhizomik.net/~roberto