Interaction between record matching and data repairing

Wenfei Fan, Jianzhong Li, Shuai Ma, Nan Tang, Wenyuan Yu

Research output: Chapter in Book/Report/Conference proceedingConference contribution

75 Citations (Scopus)

Abstract

Central to a data cleaning system are record matching and data repairing. Matching aims to identify tuples that refer to the same real-world object, and repairing is to make a database consistent by fixing errors in the data by using constraints. These are treated as separate processes in current data cleaning systems, based on heuristic solutions. This paper studies a new problem, namely, the interaction between record matching and data repairing. We show that repairing can effectively help us identify matches, and vice versa. To capture the interaction, we propose a uniform framework that seamlessly unifies repairing and matching operations, to clean a database based on integrity constraints, matching rules and master data. We give a full treatment of fundamental problems associated with data cleaning via matching and repairing, including the static analyses of constraints and rules taken together, and the complexity, termination and determinism analyses of data cleaning. We show that these problems are hard, ranging from NP- or coNP-complete, to PSPACE-complete. Nevertheless, we propose efficient algorithms to clean data via both matching and repairing. The algorithms find deterministic fixes and reliable fixes based on confidence and entropy analysis, respectively, which are more accurate than possible fixes generated by heuristics. We experimentally verify that our techniques significantly improve the accuracy of record matching and data repairing taken as separate processes, using real-life data.

Original languageEnglish
Title of host publicationProceedings of SIGMOD 2011 and PODS 2011
Pages469-480
Number of pages12
DOIs
Publication statusPublished - 11 Jul 2011
Event2011 ACM SIGMOD and 30th PODS 2011 Conference - Athens, Greece
Duration: 12 Jun 201116 Jun 2011

Publication series

NameProceedings of the ACM SIGMOD International Conference on Management of Data
ISSN (Print)0730-8078

Other

Other2011 ACM SIGMOD and 30th PODS 2011 Conference
CountryGreece
CityAthens
Period12/6/1116/6/11

Keywords

  • conditional functional dependency
  • data cleaning
  • matching dependency

ASJC Scopus subject areas

  • Software
  • Information Systems

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  • Cite this

    Fan, W., Li, J., Ma, S., Tang, N., & Yu, W. (2011). Interaction between record matching and data repairing. In Proceedings of SIGMOD 2011 and PODS 2011 (pp. 469-480). (Proceedings of the ACM SIGMOD International Conference on Management of Data). https://doi.org/10.1145/1989323.1989373