A Taxonomy of Dirty Data |
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Authors: | Won Kim Byoung-Ju Choi Eui-Kyeong Hong Soo-Kyung Kim Doheon Lee |
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Affiliation: | (1) Cyber Database Solutions, Inc., Austin, Texas, USA;(2) Department of Computer Science, Ewha Institute of Science and Technology, Seoul, Korea;(3) University of Seoul, AITrc, Seoul, Korea;(4) Lucent Technologies, Seoul, Korea;(5) Department of Biosystems, Korea Advanced Institute of Science and Technology, Daejon, Korea |
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Abstract: | Today large corporations are constructing enterprise data warehouses from disparate data sources in order to run enterprise-wide data analysis applications, including decision support systems, multidimensional online analytical applications, data mining, and customer relationship management systems. A major problem that is only beginning to be recognized is that the data in data sources are often dirty. Broadly, dirty data include missing data, wrong data, and non-standard representations of the same data. The results of analyzing a database/data warehouse of dirty data can be damaging and at best be unreliable. In this paper, a comprehensive classification of dirty data is developed for use as a framework for understanding how dirty data arise, manifest themselves, and may be cleansed to ensure proper construction of data warehouses and accurate data analysis. The impact of dirty data on data mining is also explored. |
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Keywords: | dirty data data quality data mining data cleansing data warehousing |
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