Doberkat, Ernst-ErichOmodeo, Eugenio G.2004-12-062004-12-0620012002-03-07http://hdl.handle.net/2003/264110.17877/DE290R-14938We provide a detailed analysis of the insertion and deletion operations for an ER-model represented in terms of the map calculus. This continues our previous study of compiling an ER model into the abstract setting of what might be called logic without variables.enUniversität DortmundInternes Memorandum des Lehrstuhls für Software-Technologie / Fachbereich Informatik, Universität Dortmund ; 114004working paper