Ontology evolution is a complex activity that is required in order to ensure the consistency of an ontology when any modifications are applied. Ontology evolution becomes even more complex in the context of BOEMIE, due to the management of multimedia resources and ontologies and to the multi-modal semantic information extraction to be enabled. To this end, starting from the state of the art in the field of ontology evolution methodologies and techniques, we define an evolution methodology that takes into account the new requirements posed by multimedia information extraction and management. The BOEMIE methodology for multimedia ontology evolution determines the manner in which the interlinked ontologies of the BOEMIE semantic model will be updated, preserving their semantic consistency. At the same time,the methodology complies with the bootstrapping process, using the information extracted from the multimedia content and
>providing the necessary semantic information back to the information extraction modules. The ontology is enriched with new knowledge as a consequence of the extraction process and the new evolved ontology is used to further improve the extraction process, thus triggering a new boost-rapping cycle.