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The multimedia metamodel defines platform-independent multimedia concepts, opening the way for novel approaches to designing content repurposing solutions. Designers can use the metamodel to create content and add metadata to existing content, simplifying content analysis and repurposing. This model-driven approach and proposed design solutions are useful not only for many multimedia designers and researchers, where the model-driven tools can help them create better multimedia interfaces, but also for lecturers and students of multimedia courses. In the latter case, the unified multimedia metamodel offers context for sometimes subtle relationships between multimedia concepts. The metamodel can also facilitate the collaborative creation of broader knowledge about multimedia phenomena. In our future work, we plan to extend the proposed metamodel and include domains from related fields, such as user modeling and intelligent tutoring systems that deal with high-level user models. We are also designing multimodal test environments, reusable multimedia components, and data mining tools for evaluating various aspects of multimedia and multimodal communication.