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Spreadsheets are widely used in all kinds of business applications. Numerous studies have shown that they contain many errors that sometimes have dramatic impacts. One reason for this situation is the low-level, cell-oriented development process of spreadsheets. We improve this process by introducing and formalizing a higher-level object-oriented model termed ClassSheet. While still following the tabular look-and-feel of spreadsheets, ClassSheets allow the developer to express explicitlydoi:10.1145/1101908.1101929 dblp:conf/kbse/EngelsE05 fatcat:bgxxgu2kvbd6pfejxxzcvkjfvi