Incomplete Information in Relational Databases
Journal of the ACM (JACM)
Computer interpretation of natural language descriptions
Computer interpretation of natural language descriptions
A model-based approach to updating databases with incomplete information
ACM Transactions on Database Systems (TODS)
VAGUE: a user interface to relational databases that permits vague queries
ACM Transactions on Information Systems (TOIS)
An algebraic evaluation method for deduction in incomplete data bases
Journal of Logic Programming
Incomplete information in a deductive database
Data & Knowledge Engineering
Proximity relations in the fuzzy relational database model
Fuzzy Sets and Systems
Data analysis and learning: an experimental study of data modeling tools
International Journal of Man-Machine Studies
Comparing representations with relational and EER models
Communications of the ACM
Conceptual schema and relational database design: a fact oriented approach
Conceptual schema and relational database design: a fact oriented approach
Explaining ambiguity in a formal query language
ACM Transactions on Database Systems (TODS)
A probabilistic relational data model
EDBT '90 Proceedings of the 2nd international conference on extending database technology: Advances in Database Technology
SCISOR: extracting information from on-line news
Communications of the ACM
Incomplete information in object-oriented databases
ACM SIGMOD Record
Accommodating imprecision in database systems: issues and solutions
ACM SIGMOD Record - Directions for future database research & development
QBD*: A Graphical Query Language with Recursion
IEEE Transactions on Software Engineering
Representing and manipulating uncertain data
International Journal of Man-Machine Studies - Special issue: symbolic problem solving in noisy and novel task environments
A framework for studying human error behavior in conceptual database modeling
Information and Management
Improving conceptual database design through feedback
International Journal of Human-Computer Studies
A probabilistic object-oriented data model
Data & Knowledge Engineering
Subtyping and polymorphism in object-role modelling
Data & Knowledge Engineering
Framework for a conceptual query language for capturing relationship semantics in databases
Framework for a conceptual query language for capturing relationship semantics in databases
Conceptual schema and relational database design (2nd ed.)
Conceptual schema and relational database design (2nd ed.)
Natural language processing for information retrieval
Communications of the ACM
An introduction to database systems (7th ed.)
An introduction to database systems (7th ed.)
A statistical approach to incomplete information in database systems
ACM Transactions on Database Systems (TODS)
A foundation of CODD's relational maybe-operations
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)
International Journal of Human-Computer Studies
A formal basis for an abbreviated concept-based query language
Data & Knowledge Engineering
Text Information Retrieval Systems
Text Information Retrieval Systems
Problem of Incomplete Information in Relational Databases
Problem of Incomplete Information in Relational Databases
Null values in data base management a denotational semantics approach
SIGMOD '79 Proceedings of the 1979 ACM SIGMOD international conference on Management of data
Database relations with null values
PODS '82 Proceedings of the 1st ACM SIGACT-SIGMOD symposium on Principles of database systems
A Universal Relation Data Model with Semantic Abstractions
IEEE Transactions on Knowledge and Data Engineering
KDA: A Knowledge-Based Database Assistant with a Query Guiding Facility
IEEE Transactions on Knowledge and Data Engineering
An Algebra for Probabilistic Databases
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
IEEE Transactions on Knowledge and Data Engineering
Imprecise and Uncertain Information in Databases: An Evidential Approach
Proceedings of the Eighth International Conference on Data Engineering
Knowledge Mining by Imprecise Querying: A Classification-Based Approach
Proceedings of the Eighth International Conference on Data Engineering
The Theory of Probabilistic Databases
VLDB '87 Proceedings of the 13th International Conference on Very Large Data Bases
An Extended Relational Database Model for Uncertain and Imprecise Information
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
A Selection of Papers Presented at Two IJCAI-91 Workshops on The Next Generation of Information Systems: From Data to Knowledge
An Approach to Computation Specification for an Entity-Relationship Query Language
Proceedings of the Sixth International Conference on Entity-Relationship Approach
Abbreviated Query Interpretation in Extended Entity-Relationship Oriented Databases
Proceedings of the Eight International Conference on Enity-Relationship Approach to Database Design and Querying
Database Schema Transformation and Optimization
OOER '95 Proceedings of the 14th International Conference on Object-Oriented and Entity-Relationship Modelling
Conceptual Queries Using ConQuer-II
ER '97 Proceedings of the 16th International Conference on Conceptual Modeling
An abbreviated concept-based query language and its exploratory evaluation
Journal of Systems and Software
A knowledge level user interface using the entity-relationship model
A knowledge level user interface using the entity-relationship model
Natural Language Query Filtration in the Conceptual Query Language
HICSS '97 Proceedings of the 30th Hawaii International Conference on System Sciences: Information System Track-Organizational Systems and Technology - Volume 3
A parametric linguistics based approach for cross-lingual web querying
Data & Knowledge Engineering
A knowledge retrieval model using ontology mining and user profiling
Integrated Computer-Aided Engineering
A knowledge elicitation study for a speech enabled GIS to handle vagueness in communication
HCII'11 Proceedings of the 14th international conference on Human-computer interaction: towards mobile and intelligent interaction environments - Volume Part III
Multi-lingual web querying: a parametric linguistics based approach
NLDB'06 Proceedings of the 11th international conference on Applications of Natural Language to Information Systems
HCI'13 Proceedings of the 15th international conference on Human-Computer Interaction: interaction modalities and techniques - Volume Part IV
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Missing information, imprecision, inconsistency, vagueness, uncertainty, and ignorance abound in information systems. Such imperfection is a fact of life in database systems. Although these problems are widely studied in relational database systems, this is not the case in conceptual query systems. And yet, concept-based query languages have been proposed and some are already commercial products. It is therefore imperative to study these problems in concept-based query languages, with a view to prescribing formal approaches to dealing with the problems. In this article, we have done just that for a concept-based natural language query system that we developed. A methodology for handling and resolving each type of imperfection is developed. The proposed approaches are automated as much as possible, with the user mainly serving an assistive function.