Asdataanalystsatalargeinformation-intensivebusiness,weoftenhavebeenaskedtoanalyzenew(tous)datasets.Thisexperiencewastheoriginalmotivationforourinterestinthetopicsofexploratorydatamininganddataquality.Mostdataminingandanalysistechniquesassumethatthedatahavebeenjoinedintoasingleta