Implementing imprecision in information systems
Information Sciences: an International Journal - Special issue on expert systems
Incomplete information costs and database design
ACM Transactions on Database Systems (TODS)
Relational database: selected writings
Relational database: selected writings
Fusion, propagation, and structuring in belief networks
Artificial Intelligence
The temporal query language TQuel
ACM Transactions on Database Systems (TODS)
Fuzzy functional dependencies and lossless join decomposition of fuzzy relational database systems
ACM Transactions on Database Systems (TODS)
The relational model for database management: version 2
The relational model for database management: version 2
Probabilistic semantics for nonmonotonic reasoning: a survey
Proceedings of the first international conference on Principles of knowledge representation and reasoning
Answering heterogeneous database queries with degrees of uncertainty
Distributed and Parallel Databases
A statistical approach to incomplete information in database systems
ACM Transactions on Database Systems (TODS)
On semantic issues connected with incomplete information databases
ACM Transactions on Database Systems (TODS)
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
The Management of Probabilistic Data
IEEE Transactions on Knowledge and Data Engineering
The Theory of Probabilistic Databases
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
Theory of Relational Databases
Theory of Relational Databases
Supporting valid-time indeterminacy
ACM Transactions on Database Systems (TODS)
PWA: an extended probabilistic Web algebra
Proceedings of the 21st annual international ACM SIGIR conference on Research and development in information retrieval
Selectivity estimation using probabilistic models
SIGMOD '01 Proceedings of the 2001 ACM SIGMOD international conference on Management of data
Probabilistic temporal databases, I: algebra
ACM Transactions on Database Systems (TODS)
ACM Transactions on Database Systems (TODS)
A survey in indexing and searching XML documents
Journal of the American Society for Information Science and Technology - XML
A data model and algebra for probabilistic complex values
Annals of Mathematics and Artificial Intelligence
Data Mining and Knowledge Discovery
Generalized Normal Forms for Probabilistic Relational Data
IEEE Transactions on Knowledge and Data Engineering
Information Systems That also Project into the Future
DNIS '02 Proceedings of the Second International Workshop on Databases in Networked Information Systems
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Decision Support with Imprecise Data for Consumers
Soft-Ware 2002 Proceedings of the First International Conference on Computing in an Imperfect World
A Data Model for Flexible Querying
ADBIS '01 Proceedings of the 5th East European Conference on Advances in Databases and Information Systems
Factual and Temporal Imperfection
ADVIS '00 Proceedings of the First International Conference on Advances in Information Systems
Estimation of Uncertain Relations between Indeterminate Temporal Points
ADVIS '00 Proceedings of the First International Conference on Advances in Information Systems
Pattern Discovery in Probabilistic Databases
AI '01 Proceedings of the 14th Australian Joint Conference on Artificial Intelligence: Advances in Artificial Intelligence
Extension of the Relational Algebra to Probabilistic Complex Values
FoIKS '00 Proceedings of the First International Symposium on Foundations of Information and Knowledge Systems
ISMIS '02 Proceedings of the 13th International Symposium on Foundations of Intelligent Systems
On the Specification of Representation-Based Conditions in a Context of Incomplete Databases
DEXA '99 Proceedings of the 10th International Conference on Database and Expert Systems Applications
Efficient similarity-based operations for data integration
Data & Knowledge Engineering
Managing Uncertainties in Image Databases: A Fuzzy Approach
Multimedia Tools and Applications
Aggregate operators in probabilistic databases
Journal of the ACM (JACM)
A Probabilistic XML Approach to Data Integration
ICDE '05 Proceedings of the 21st International Conference on Data Engineering
A Framework for Management of Semistructured Probabilistic Data
Journal of Intelligent Information Systems
Defining and implementing domains with multiple types using mesodata modelling techniques
APCCM '06 Proceedings of the 3rd Asia-Pacific conference on Conceptual modelling - Volume 53
Creating probabilistic databases from information extraction models
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Maximally joining probabilistic data
Proceedings of the twenty-sixth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
ACM Transactions on Computational Logic (TOCL)
Efficient query evaluation on probabilistic databases
The VLDB Journal — The International Journal on Very Large Data Bases
ProTDB: probabilistic data in XML
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
A nearest neighborhood algebra for probabilistic databases
Intelligent Data Analysis
A Logical Formulation of Probabilistic Spatial Databases
IEEE Transactions on Knowledge and Data Engineering
Matching twigs in probabilistic XML
VLDB '07 Proceedings of the 33rd international conference on Very large data bases
Ranking queries on uncertain data: a probabilistic threshold approach
Proceedings of the 2008 ACM SIGMOD international conference on Management of data
Query answering techniques on uncertain and probabilistic data: tutorial summary
Proceedings of the 2008 ACM SIGMOD international conference on Management of data
Representation of factual and temporal unawareness in electronic patient records
Journal of Computational Methods in Sciences and Engineering
Optimization of Queries over Interval Probabilistic Data
SUM '08 Proceedings of the 2nd international conference on Scalable Uncertainty Management
Generating efficient safe query plans for probabilistic databases
Data & Knowledge Engineering
Approximate Probabilistic Query Answering over Inconsistent Databases
ER '08 Proceedings of the 27th International Conference on Conceptual Modeling
Probabilistic Threshold Range Aggregate Query Processing over Uncertain Data
APWeb/WAIM '09 Proceedings of the Joint International Conferences on Advances in Data and Web Management
Maintaining consistency of vague databases using data dependencies
Data & Knowledge Engineering
Continuously monitoring top-k uncertain data streams: a probabilistic threshold method
Distributed and Parallel Databases
Query evaluation over probabilistic XML
The VLDB Journal — The International Journal on Very Large Data Bases
A flexible framework for multisensor data fusion using data stream management technologies
Proceedings of the 2009 EDBT/ICDT Workshops
Using similarity-based operations for resolving data-level conflicts
BNCOD'03 Proceedings of the 20th British national conference on Databases
Handling inconsistency of vague relations with functional dependencies
ER'07 Proceedings of the 26th international conference on Conceptual modeling
Association rule mining: models and algorithms
Association rule mining: models and algorithms
A Survey on Uncertainty Management in Data Integration
Journal of Data and Information Quality (JDIQ)
Ranking queries on uncertain data
The VLDB Journal — The International Journal on Very Large Data Bases
A probabilistic interpretation for a geometric similarity measure
ECSQARU'11 Proceedings of the 11th European conference on Symbolic and quantitative approaches to reasoning with uncertainty
Handling uncertainty and ignorance in databases: a rule to combine dependent data
DASFAA'06 Proceedings of the 11th international conference on Database Systems for Advanced Applications
Estimating recall and precision for vague queries in databases
CAiSE'05 Proceedings of the 17th international conference on Advanced Information Systems Engineering
Ontology-Based user context management: the challenges of imperfection and time-dependence
ODBASE'06/OTM'06 Proceedings of the 2006 Confederated international conference on On the Move to Meaningful Internet Systems: CoopIS, DOA, GADA, and ODBASE - Volume Part I
Models for incomplete and probabilistic information
EDBT'06 Proceedings of the 2006 international conference on Current Trends in Database Technology
Probabilistic query answering over inconsistent databases
Annals of Mathematics and Artificial Intelligence
AN EFFICIENT REPRESENTATION MODEL OF DISTANCE DISTRIBUTION BETWEEN UNCERTAIN OBJECTS
Computational Intelligence
Information Processing and Management: an International Journal
FARP: Mining fuzzy association rules from a probabilistic quantitative database
Information Sciences: an International Journal
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Although the relational model for databases provides a great range of advantages over other data models, it lacks a comprehensive way to handle incomplete and uncertain data. Uncertainty in data values, however, is pervasive in all real-world environments and has received much attention in the literature. Several methods have been proposed for incorporating uncertain data into relational databases. However, the current approaches have many shortcomings and have not established an acceptable extension of the relational model. In this paper, we propose a consistent extension of the relational model. We present a revised relational structure and extend the relational algebra. The extended algebra is shown to be closed, a consistent extension of the conventional relational algebra, and reducible to the latter.