As each of us perceives and conceptualizes the
same world differently, imposing a single global schema for all users can seriously interfere with individual work and lead to errors. In this paper, we make a call for personal semantic data integration, i.e., semantic data integration whose results precisely fit individual needs and references. We classify problems that make a single global schema inappropriate for particular users, and introduce the ASME criteria as prerequisites for personal semantic data integration. We then outline personal semantic
data integration in the SIRUP approach. Our goal is to stimulate research into personally tailored data integration and to develop new solutions which improve the usability of integrated data.