The key aspect of any mobile multimedia application is the multimedia document. Currently, multimedia documents can be executed on multiple platforms (laptop, Smartphone, tablet, etc.), that resulting in a birth of new information system called pervasive. The different execution contexts of a multimedia presentation introduce different constraints on the presentation itself. This includes device constraints and user preferences, resulting to the overall system heterogeneity increase. In this paper, we propose a specific ontology for adapting multimedia applications. Thus, we propose rules allowing automatic generation of dynamic and quality assembly of heterogeneous components. The proposed ontology has the great advantage to offer to users a flexible infrastructure where they can easily govern the response time and the quality assembly of their own applications at runtime.