“…A common standard of infrastructure, data structure and user model modules would ease the implementation and evaluation of novel ideas and allow researchers to focus on specific research questions while evaluating them in a common environment. As for architecture, user models should be separated from the applications, thus enabling external, standard user modeling components to use and re-use personal data (Kobsa, 2001) or using standard ontologies such as GUMO (Heckmann et al, 2005) and communicating in standard protocols such as UserML (Heckmann and Krüger, 2003). Moreover, standard architectures (such as the multi-agents architecture suggested in PEACH) may allow cultural heritage application developers to focus on developing their specific application while re-using existing infrastructure.…”