In this paper we present a multimedia metadata management system that uses ontologies for efficient multimedia traceability and management. The use of digital devices to produce image and video content even by novices is expected to significantly increase the amount of multimedia data. This raises the need of adoption of an effective ontology-based model for intelligent multimedia metadata management. The problem assumes greater significance due to different file formats and the necessity of integrating largely distributed and diverse information system implementations. Provided that efficient searching and retrieval systems are based on how annotated data are organized and managed, in our study we use the RSS 2.0 (Really Simple Syndication) format, for enhancing the ontology with multimedia information.