Preference elicitation in prioritized skyline queries
نویسندگان
چکیده
منابع مشابه
Optimal Preference Elicitation for Skyline Queries over Categorical Domains
When issuing user-specific queries, users often have a vaguely defined information need. Skyline queries identify the most “interesting” objects for users’ incomplete preferences, which provides users with intuitive query formulation mechanism. However, the applicability of this intuitive query paradigm suffers from a severe drawback. Incomplete preferences on domain values can often lead to im...
متن کاملRelational Preference Queries via Stable Skyline
We advocate the extension of relational database systems to support preference queries. Many database applications today— from e-commerce to queries over scientific data-sets—are essentially best-match searches. Relational queries are ill-suited for these. Supporting preference criteria in the query language can extend its expresssiveness to cover best-match queries in a natural way. We study s...
متن کاملSkyline Queries for Preference-Based Information Systems
Cooperative database retrieval is a challenging problem. In today‟s information systems instead of just retrieving all objects from databases that exactly match a user‟s query, often a set of objects best matching the query attributes is desired. Starting from a set of individual user preferences for each attribute, the query can be relaxed step by step until a satisfying result set can be retu...
متن کاملSkyline Queries
DEFINITION: Given a set of points p1, p2, ......., pn, the skyline query returns a set of points P, called as the skyline points, such that any point pi ∈ P is not dominated by any other point in the dataset. A point p1 dominates another point p2, if p1 is not worse than p2 in all dimensions and p1 is better than p2 in at least one dimension. In other words, a point p1 dominates another point p...
متن کاملSemi-Skyline Optimization of Constrained Skyline Queries
Skyline evaluation techniques (also known as Pareto preference queries) follow a common paradigm that eliminates data elements by finding other elements in a data set that dominate them. Nowadays already a variety of sophisticated skyline evaluation techniques are known, hence skylines are considered a well researched area. On the other hand, the skyline operator does not stand alone in databas...
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ژورنال
عنوان ژورنال: The VLDB Journal
سال: 2011
ISSN: 1066-8888,0949-877X
DOI: 10.1007/s00778-011-0227-9