As corporate data is more and more becoming an invaluable asset for decision makers,technologies such as data warehouses and data mining are an essential part of a company's nformaiton infrasturucture.Mehtods ofor mining corporate data and extracting rules form it are well establish3ed form crisp and traditioanl fuzzy data.This paper aims at extending the traditional fuzzy approach for situatiosn where memebership vlaues are intervals.
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