Suchergebnisse

Current proposals for designing information systems lack the mechanisms to define statistical functions at the conceptual level. Therefore, queries containing these kind of functions are defined once the rest of the system has already been implemented, which requires much effort and expertise. In this sense, the goal of this paper is to show the benefits of extending the Object Constraint Language (OCL) with a predefined set of statistical functions. ; Work supported by the projects: TIN2008-00444, ESPIA (TIN2007-67078) from the Spanish Ministry of Education and Science (MEC), QUASIMODO (PAC08-0157-0668) from the Castilla-La Mancha Ministry of Education and Science (Spain), and DEMETER (GVPRE/2008/063) from the Valencia Government (Spain). Jose-Norberto Mazón and Jesús Pardillo are funded by MEC under FPU grants AP2005-1360 and AP2006-00332, respectively. Jordi Cabot is funded by the 2007 BP-A 00128 grant (Catalan Government).