Complex systems-on-chip present one of the most challenging design problems of today. To meet this challenge, new design languages capable to model such heterogeneous, dynamic systems are needed. For implementation of such a language, the use of an object oriented C++ class library has proven to be a promising approach, since new classes dealing with design- and platform-specific problems can be added in a conceptual and seamlessly reusable way. This paper shows the development of such an extension aimed to provide a platform-independent high-level struc-tured storage object through hiding of the low-level implementation details. It results in a completely virtualised, user-extendible component, suitable for use in heterogeneous systems.