SYSTEM/U: a database system based on the universal relation assumption
ACM Transactions on Database Systems (TODS)
Resolving the query inference problem using Steiner trees
ACM Transactions on Database Systems (TODS)
BAROQUE: a browser for relational databases
ACM Transactions on Information Systems (TOIS)
Compilers: principles, techniques, and tools
Compilers: principles, techniques, and tools
SEAVE: a mechanism for verifying user presuppositions in query systems
ACM Transactions on Information Systems (TOIS)
Constructing queries from tokens
SIGMOD '86 Proceedings of the 1986 ACM SIGMOD international conference on Management of data
Providing Quality Responses with Natural Language Interfaces: The Null Value Problem
IEEE Transactions on Software Engineering
Maximal objects and the semantics of universal relation databases
ACM Transactions on Database Systems (TODS)
The universal relation revisited (technical correspondence)
ACM Transactions on Database Systems (TODS)
ACM Transactions on Database Systems (TODS)
LDC-1: a transportable, knowledge-based natural language processor for office environments
ACM Transactions on Information Systems (TOIS)
Assemblers, Compilers, and Program Translation
Assemblers, Compilers, and Program Translation
Graph Algorithms
An entity-based database user interface
SIGMOD '80 Proceedings of the 1980 ACM SIGMOD international conference on Management of data
Cooperative Responses to Boolean Queries
Proceedings of the First International Conference on Data Engineering
TIMBER: A Sophisticated Relation Browser (Invited Paper)
VLDB '82 Proceedings of the 8th International Conference on Very Large Data Bases
Theory of Relational Databases
Theory of Relational Databases
Semantic vs. structural resemblance of classes
ACM SIGMOD Record
The design and implementation of CoBase
SIGMOD '93 Proceedings of the 1993 ACM SIGMOD international conference on Management of data
Incomplete path expressions and their disambiguation
SIGMOD '94 Proceedings of the 1994 ACM SIGMOD international conference on Management of data
Knowledge-based document retrieval in office environments: the Kabiria system
ACM Transactions on Information Systems (TOIS)
The model-assisted global query system for multiple databases in distributed enterprises
ACM Transactions on Information Systems (TOIS)
VisDB: Database Exploration Using Multidimensional Visualization
IEEE Computer Graphics and Applications
Intensional Answers to Database Queries
IEEE Transactions on Knowledge and Data Engineering
A Structured Approach for Cooperative Query Answering
IEEE Transactions on Knowledge and Data Engineering
Visualization Techniques for Mining Large Databases: A Comparison
IEEE Transactions on Knowledge and Data Engineering
A Framework for Knowledge Discovery and Evolution in Databases
IEEE Transactions on Knowledge and Data Engineering
Domain Analysis and Queries in Context
NLDB '00 Proceedings of the 5th International Conference on Applications of Natural Language to Information Systems-Revised Papers
Qualified Answers That Reflect User Needs and Preferences
VLDB '94 Proceedings of the 20th International Conference on Very Large Data Bases
ADBIS '02 Proceedings of the 6th East European Conference on Advances in Databases and Information Systems
Visual feedback in querying large databases
VIS '93 Proceedings of the 4th conference on Visualization '93
Cooperative query processing via knowledge abstraction and query relaxation
Advanced topics in database research vol. 1
Remindin': semantic query routing in peer-to-peer networks based on social metaphors
Proceedings of the 13th international conference on World Wide Web
Machine learning for online query relaxation
Proceedings of the tenth ACM SIGKDD international conference on Knowledge discovery and data mining
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
Efficient detection of empty-result queries
VLDB '06 Proceedings of the 32nd international conference on Very large data bases
Browsing databases with constraint hierarchies
Electronic Commerce Research
COOPERATIVE QUERY REWRITING FOR DECISION MAKING SUPPORT AND RECOMMENDER SYSTEMS
Applied Artificial Intelligence
Online query relaxation via Bayesian causal structures discovery
AAAI'05 Proceedings of the 20th national conference on Artificial intelligence - Volume 2
Efficient discovery of join plans in schemaless data
IDEAS '09 Proceedings of the 2009 International Database Engineering & Applications Symposium
Incremental controlled relaxation of failing flexible queries
Journal of Intelligent Information Systems
Relaxing RDF queries based on user and domain preferences
Journal of Intelligent Information Systems
A Model for Contextual Cooperative Query Answering in E-Commerce Applications
FQAS '09 Proceedings of the 8th International Conference on Flexible Query Answering Systems
Cooperative answering to flexible queries via a tolerance relation
ISMIS'08 Proceedings of the 17th international conference on Foundations of intelligent systems
An effective query relaxation solution for the deep web
APWeb'08 Proceedings of the 10th Asia-Pacific web conference on Progress in WWW research and development
Improving Decision Quality Through Preference Relaxation
Proceedings of the 2010 conference on Bridging the Socio-technical Gap in Decision Support Systems: Challenges for the Next Decade
Approximating query answering on RDF databases
World Wide Web
Intelligent product search with soft-boundary preference relaxation
Expert Systems with Applications: An International Journal
Robust query processing for personalized information access on the semantic web
FQAS'06 Proceedings of the 7th international conference on Flexible Query Answering Systems
Generalizing conjunctive queries for informative answers
FQAS'11 Proceedings of the 9th international conference on Flexible Query Answering Systems
Qualifying Answers According to User Needs and Preferences
Fundamenta Informaticae
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FLEX a user interface to relational databases, can be used satisfactorily by users with different levels of expertise. FLEX is based on a formal query language, but is tolerant of incorrect input. It never rejects queries; instead, it adapts flexibility and transparently to their level of correctness and well-formedness, providing interpretations of corresponding accuracy and specificity. The most prominent design feature of FLEX is the smooth concatenation of several independent mechanisms, each capable of handling input of decreasing level of correctness and well-formedness. Each input is cascaded through this series of mechanisms until an interpretation is found. FLEX is also cooperative. It never delivers empty answers without explanation or assistance. By following up each failed query with a set of more general queries, FLEX determines whether an empty answer is genuine, in which case it suggests related queries that have nonempty answers, or whether it reflects erroneous presuppositions on the part of the user, in which case it then explains them.