Resolving the query inference problem using Steiner trees
ACM Transactions on Database Systems (TODS)
Questions, answers, and responses: interacting with knowledge base systems
On knowledge base management systems: integrating artificial intelligence and d atabase technologies
SEAVE: a mechanism for verifying user presuppositions in query systems
ACM Transactions on Information Systems (TOIS)
Semantic retrieval and levels of abstraction
Proceedings from the first international workshop on Expert database systems
Semantic query optimization in expert systems and database systems
Proceedings from the first international workshop on Expert database systems
Intelligent query answering in rule based systems
Journal of Logic Programming
Principles of database and knowledge-base systems, Vol. I
Principles of database and knowledge-base systems, Vol. I
Semantic database modeling: survey, applications, and research issues
ACM Computing Surveys (CSUR)
ACM Computing Surveys (CSUR)
Object-oriented concepts, databases, and applications
Object-oriented concepts, databases, and applications
Using integrity constraints to provide intensional answers to relational queries
VLDB '89 Proceedings of the 15th international conference on Very large data bases
Maximal objects and the semantics of universal relation databases
ACM Transactions on Database Systems (TODS)
The entity-relationship model—toward a unified view of data
ACM Transactions on Database Systems (TODS) - Special issue: papers from the international conference on very large data bases: September 22–24, 1975, Framingham, MA
Toward logical data independence: a relational query language without relations
SIGMOD '82 Proceedings of the 1982 ACM SIGMOD international conference on Management of data
FLEX: A Tolerant and Cooperative User Interface to Databases
IEEE Transactions on Knowledge and Data Engineering
Constraints for Improving the Generation of Intensional Answers in a Deductive Database
Proceedings of the Fifth International Conference on Data Engineering
Using Type Inference and Induced Rules to Provide Intensional Answers
Proceedings of the Seventh International Conference on Data Engineering
Cooperative Responses to Boolean Queries
Proceedings of the First International Conference on Data Engineering
An Information-Theoretic Study on Aggregate Responses
VLDB '88 Proceedings of the 14th International Conference on Very Large Data Bases
Intensional query processing using data mining approaches
CIKM '97 Proceedings of the sixth international conference on Information and knowledge management
Information systems research at George Mason University
ACM SIGMOD Record
A Model for Query Decomposition and Answer Construction inHeterogeneous Distributed Database Systems
Journal of Intelligent Information Systems
Cooperative Answering through Controlled Query Relaxation
IEEE Expert: Intelligent Systems and Their Applications
Domain Analysis and Queries in Context
NLDB '00 Proceedings of the 5th International Conference on Applications of Natural Language to Information Systems-Revised Papers
Cooperative query processing via knowledge abstraction and query relaxation
Advanced topics in database research vol. 1
Advanced query language for manipulating complex entities
Information Processing and Management: an International Journal
PSE: An Object-Oriented Representation for Modeling and Managing Part-of Relationships
Journal of Intelligent Information Systems
Representation of factual and temporal unawareness in electronic patient records
Journal of Computational Methods in Sciences and Engineering
Intensional Question Answering Using ILP: What Does an Answer Mean?
NLDB '08 Proceedings of the 13th international conference on Natural Language and Information Systems: Applications of Natural Language to Information Systems
Proceedings of the 2009 ACM SIGMOD International Conference on Management of data
A Model for Contextual Cooperative Query Answering in E-Commerce Applications
FQAS '09 Proceedings of the 8th International Conference on Flexible Query Answering Systems
Computing intensional answers to questions - An inductive logic programming approach
Data & Knowledge Engineering
Alternative query generation for XML keyword search and its optimization
DEXA'11 Proceedings of the 22nd international conference on Database and expert systems applications - Volume Part I
Intensional encapsulations of database subsets via genetic programming
DEXA'05 Proceedings of the 16th international conference on Database and Expert Systems Applications
Towards intensional answers to OLAP queries for analytical sessions
Proceedings of the fifteenth international workshop on Data warehousing and OLAP
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In addition to data, database systems store various kinds of information about their data. Examples are: class hierarchies, to define the various data classes and their relationships; integrity constraints, to state required relationships among the data; and inference rules, to define new classes in terms of known classes. This information is often referred to as intensional information (the data are referred to as extensional information). There have been several independent research works that suggested ways by which intensional information may be used to improve the conventional (extensional) database answers. Although each of these efforts developed its own specific methods, they all share a common belief: database answers would be improved if accompanied by intensional statements that describe them more abstractly. We study and compare the various approaches to intensional answers by using various classifications; we examine their relative merits with regard to key aspects; we discuss remaining issues; and we offer new research directions.