Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Dimensions of Ignorance in a Semi-Structured Data Model
DEXA '04 Proceedings of the Database and Expert Systems Applications, 15th International Workshop
A Probabilistic XML Approach to Data Integration
ICDE '05 Proceedings of the 21st International Conference on Data Engineering
MYSTIQ: a system for finding more answers by using probabilities
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
U-DBMS: a database system for managing constantly-evolving data
VLDB '05 Proceedings of the 31st international conference on Very large data bases
Working Models for Uncertain Data
ICDE '06 Proceedings of the 22nd International Conference on Data Engineering
Data integration: the teenage years
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Trio: a system for data, uncertainty, and lineage
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Management of interval probabilistic data
Acta Informatica
Bootstrapping pay-as-you-go data integration systems
Proceedings of the 2008 ACM SIGMOD international conference on Management of data
Schema integration based on uncertain semantic mappings
ER'05 Proceedings of the 24th international conference on Conceptual Modeling
Managing lineage and uncertainty under a data exchange setting
SUM'10 Proceedings of the 4th international conference on Scalable uncertainty management
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In this paper we introduce the problem of managing uncertainty on the schema of a relational database. We formalize this problem using a possible world semantics, identify the challenges posed by the co-existence of many alternative schemata, and define some basic properties of a system with uncertain schemata. Finally, we describe a query rewriting system, i.e., the technique used to produce valid queries for each alternative schema, and study its properties.