A semantics of multiple inheritance.
Proc. of the international symposium on Semantics of data types
Incomplete Information in Relational Databases
Journal of the ACM (JACM)
Minstrel-ODM: A basic office data model
Information Processing and Management: an International Journal
A model-based approach to updating databases with incomplete information
ACM Transactions on Database Systems (TODS)
An approach to handling incomplete information in databases
The Computer Journal
Horn tables-an efficient tool for handling incomplete information in databases
PODS '89 Proceedings of the eighth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
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)
Null values in data base management a denotational semantics approach
SIGMOD '79 Proceedings of the 1979 ACM SIGMOD international conference on Management of data
Dependency Satisfaction in Databases with Incomplete Information
VLDB '84 Proceedings of the 10th International Conference on Very Large Data Bases
A formal treatment of imperfect information in database management
A formal treatment of imperfect information in database management
A formal treatment of incomplete knowledge bases
A formal treatment of incomplete knowledge bases
Data manipulation in heterogeneous databases
ACM SIGMOD Record
On deductive databases with incomplete information
ACM Transactions on Information Systems (TOIS)
Error propagation in distributed databases
CIKM '95 Proceedings of the fourth international conference on Information and knowledge management
Exposing the vagueness of query results on partly inaccessible databases
Proceedings of the tenth international conference on Information and knowledge management
A survey in indexing and searching XML documents
Journal of the American Society for Information Science and Technology - XML
An Exploration of Relationships Among Exclusive Disjunctive Data
IEEE Transactions on Knowledge and Data Engineering
Current Approaches to Handling Imperfect Information in Data and Knowledge Bases
IEEE Transactions on Knowledge and Data Engineering
A Hybrid Representation of Vague Collections for Distributed Object Management Systems
IEEE Transactions on Knowledge and Data Engineering
A Query Model to Synthesize Answer Intervals from Indexed Video Units
IEEE Transactions on Knowledge and Data Engineering
An Information Retrieval Approach for Approximate Queries
IEEE Transactions on Knowledge and Data Engineering
An Information-Retrieval Approach for Image Databases
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
A Multi-Resolution Relational Data Model
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
Decision Support with Imprecise Data for Consumers
Soft-Ware 2002 Proceedings of the First International Conference on Computing in an Imperfect World
A Closed Approach to Vague Collections in Partly Inaccessible Distributed Databases
ADBIS '99 Proceedings of the Third East European Conference on Advances in Databases and Information Systems
Answering imprecise database queries: a novel approach
WIDM '03 Proceedings of the 5th ACM international workshop on Web information and data management
Approximate Selection Queries over Imprecise Data
ICDE '04 Proceedings of the 20th International Conference on Data Engineering
Providing ranked relevant results for web database queries
Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters
Supporting Semantic Diversity in the Relational Data Model: The Case of Multi-Face Attributes
Information Systems Frontiers
Mining approximate functional dependencies and concept similarities to answer imprecise queries
Proceedings of the 7th International Workshop on the Web and Databases: colocated with ACM SIGMOD/PODS 2004
Information-theoretic measures of uncertainty for rough sets and rough relational databases
Information Sciences: an International Journal
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Information systems exist to model, store, and retrieve all types of data. Problems arise when some of the data are missing or imprecisely known or when an attribute is not applicable to a particular object. A consistent and useful treatment of such exceptions is necessary. The approach taken here is to allow any attribute value to be a regular precise value, a string denoting that the value is missing, a string denoting that the attribute is not applicable, or an imprecise value. The imprecise values introduce uncertainty into query evaluation, since it is no longer obvious which objects should be retrieved. To handle the uncertainty, two set of objects are retrieved in response to every query: the set of objects that are known to satisfy with complete certainty and the set that possibly satisfies the query with various degrees of uncertainty. Two methods of estimating this uncertainty, based on information theory, are proposed. The measure of uncertainty is used to rank objects for presentation to a user.