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PVLDB
2008
111views more  PVLDB 2008»
13 years 4 months ago
Semandaq: a data quality system based on conditional functional dependencies
We present SEMANDAQ, a prototype system for improving the quality of relational data. Based on the recently proposed conditional functional dependencies (CFDs), it detects and rep...
Wenfei Fan, Floris Geerts, Xibei Jia
ICDE
2007
IEEE
146views Database» more  ICDE 2007»
14 years 6 months ago
Conditional Functional Dependencies for Data Cleaning
We propose a class of constraints, referred to as conditional functional dependencies (CFDs), and study their applications in data cleaning. In contrast to traditional functional ...
Philip Bohannon, Wenfei Fan, Floris Geerts, Xibei ...
SIGMOD
2009
ACM
140views Database» more  SIGMOD 2009»
14 years 4 months ago
Estimating the confidence of conditional functional dependencies
Conditional functional dependencies (CFDs) have recently been proposed as extensions of classical functional dependencies that apply to a certain subset of the relation, as specif...
Graham Cormode, Lukasz Golab, Flip Korn, Andrew Mc...
DEXA
2009
Springer
167views Database» more  DEXA 2009»
13 years 11 months ago
Analyses and Validation of Conditional Dependencies with Built-in Predicates
Abstract. This paper proposes a natural extension of conditional functional dependencies (cfds [14]) and conditional inclusion dependencies (cinds [8]), denoted by cfdp s and cindp...
Wenguang Chen, Wenfei Fan, Shuai Ma
WEBDB
2009
Springer
131views Database» more  WEBDB 2009»
13 years 11 months ago
Functional Dependency Generation and Applications in Pay-As-You-Go Data Integration Systems
Recently, the opportunity of extracting structured data from the Web has been identified by a number of research projects. One such example is that millions of relational-style H...
Daisy Zhe Wang, Xin Luna Dong, Anish Das Sarma, Mi...