Querying with Intrinsic Preferences
EDBT '02 Proceedings of the 8th International Conference on Extending Database Technology: Advances in Database Technology
Preference formulas in relational queries
ACM Transactions on Database Systems (TODS)
Optimization of relational preference queries
ADC '05 Proceedings of the 16th Australasian database conference - Volume 39
Preference SQL: design, implementation, experiences
VLDB '02 Proceedings of the 28th international conference on Very Large Data Bases
Reasoning with conditional ceteris paribus preference statements
UAI'99 Proceedings of the Fifteenth conference on Uncertainty in artificial intelligence
Iterative modification and incremental evaluation of preference queries
FoIKS'06 Proceedings of the 4th international conference on Foundations of Information and Knowledge Systems
A functional model for data analysis
FQAS'06 Proceedings of the 7th international conference on Flexible Query Answering Systems
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As information becomes available in increasing amounts, and to growing numbers of users, the shift towards a more user-centered, or personalized access to information becomes crucial. In this paper we consider the semantics and pragmatics of preference queries over tables containing information objects described through a set of attributes. In particular, we address two basic issues: - how to define a preference query and its answer (semantics) - how to evaluate a preference query (pragmatics) The main contributions of this paper are (a) the proposal of an expressive language for declaring qualitative preferences, (b) a novel approach to evaluating a preference query (c) the design of a user friendly interface with preference queries. Although our main motivation originates in digital libraries, our proposal is quite general and can be used in several application contexts.