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Tutorial 6: Qualitative Data Cleaning

Presenters: Xu Chu (Univ. Waterloo), Ihab F. Ilyas (Univ. Waterloo)
Date: Tue Sep 6 - Thu Sep 8, 2016
Time: 2.00 p.m. - 3.30 p.m.
Venue: Royal 2


Data quality is one of the most important problems in data management, since dirty data often leads to inaccurate data analytics results and wrong business decisions.
Data cleaning exercise often consist of two phases: error detection and error repairing. Error detection techniques can either be quantitative or qualitative; and error repairing is performed by applying data transformation scripts or by involving human experts, and sometimes both.
In this tutorial, we discuss the main facets and directions in designing qualitative data cleaning techniques. We present a taxonomy of current qualitative error detection techniques, as well as a taxonomy of current data repairing techniques. We will also discuss proposals for tackling the challenges for cleaning "big data" in terms of scale and distribution.

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Xu Chu is a PhD student in the Cheriton School of Computer Science at University of Waterloo. His main research interests are data quality and data cleaning. He won the prestigious Microsoft Research PhD fellowship in 2015. Xu has also received Cheriton Fellowship from the University of Waterloo 2013-2015.

Ihab Ilyas is a professor in the Cheriton School of Computer Science at the University of Waterloo. He received his PhD in computer science from Purdue University, West Lafayette. His main research is in the area of database systems, with special interest in data quality, managing uncertain data, rank-aware query processing, and information extraction. Ihab is a recipient of the Ontario Early Researcher Award (2009), a Cheriton Faculty Fellowship (2013), an NSERC Discovery Accelerator Award (2014), and a Google Faculty Award (2014), and he is an ACM Distinguished Scientist. Ihab is a co-founder of Tamr, a startup focusing on large- scale data integration and cleaning. He serves on the VLDB Board of Trustees, and he is an associate editor of the ACM Transactions of Database Systems (TODS).