Statistical profile estimation in database systems
ACM Computing Surveys (CSUR)
On the effect of join operations on relation sizes
ACM Transactions on Database Systems (TODS)
Fundamentals of database systems (2nd ed.)
Fundamentals of database systems (2nd ed.)
On the estimation of join result sizes
EDBT '94 Proceedings of the 4th international conference on extending database technology: Advances in database technology
Answering queries using views (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Outerjoin simplification and reordering for query optimization
ACM Transactions on Database Systems (TODS)
The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
Managing semantic heterogeneity in databases: a theoretical prospective
PODS '97 Proceedings of the sixteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Principles of database query processing for advanced applications
Principles of database query processing for advanced applications
Implications of certain assumptions in database performance evauation
ACM Transactions on Database Systems (TODS)
On the foundations of the universal relation model
ACM Transactions on Database Systems (TODS)
Duplicate record elimination in large data files
ACM Transactions on Database Systems (TODS)
Extending the database relational model to capture more meaning
ACM Transactions on Database Systems (TODS)
Communications of the ACM - Supporting community and building social capital
Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Query processing with quality control in the World Wide Web
World Wide Web
Information Integration Using Logical Views
ICDT '97 Proceedings of the 6th International Conference on Database Theory
Data Exchange: Semantics and Query Answering
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Don't Scrap It, Wrap It! A Wrapper Architecture for Legacy Data Sources
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Building Light-Weight Wrappers for Legacy Web Data-Sources Using W4F
VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
Quality-driven Integration of Heterogenous Information Systems
VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
Completeness Information and Its Application to Query Processing
VLDB '86 Proceedings of the 12th International Conference on Very Large Data Bases
Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Object Fusion in Mediator Systems
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Using Probabilistic Information in Data Integration
VLDB '97 Proceedings of the 23rd International Conference on Very Large Data Bases
Estimating the Quality of Databases
FQAS '98 Proceedings of the Third International Conference on Flexible Query Answering Systems
Estimating the Usefulness of Search Engines
ICDE '99 Proceedings of the 15th International Conference on Data Engineering
ACM SIGMOD Record
Note on the expected size of a join
ACM SIGMOD Record
Provider issues in quality-constrained data provisioning
Proceedings of the 2nd international workshop on Information quality in information systems
Making quality count in biological data sources
Proceedings of the 2nd international workshop on Information quality in information systems
Proceedings of the 2nd international workshop on Information quality in information systems
Sample-Based Quality Estimation of Query Results in Relational Database Environments
IEEE Transactions on Knowledge and Data Engineering
Effective keyword-based selection of relational databases
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
Brokering infrastructure for minimum cost data procurement based on quality-quantity models
Decision Support Systems
A comprehensive data quality methodology for web and structured data
International Journal of Innovative Computing and Applications
ACM Computing Surveys (CSUR)
Approximating query completeness by predicting the number of answers in DHT-based web applications
Proceedings of the 10th ACM workshop on Web information and data management
International Journal of Metadata, Semantics and Ontologies
Completeness in Databases with Maybe-Tuples
ER '09 Proceedings of the ER 2009 Workshops (CoMoL, ETheCoM, FP-UML, MOST-ONISW, QoIS, RIGiM, SeCoGIS) on Advances in Conceptual Modeling - Challenging Perspectives
Distributed processing of continuous join queries using DHT networks
Proceedings of the 2009 EDBT/ICDT Workshops
Benefit and cost of query answering in PDMS
DBISP2P'05/06 Proceedings of the 2005/2006 international conference on Databases, information systems, and peer-to-peer computing
BioDQ: data quality estimation and management for genomics databases
ISBRA'08 Proceedings of the 4th international conference on Bioinformatics research and applications
Data sources selection for XML data sources
International Journal of Intelligent Information and Database Systems
Source selection in large scale data contexts: an optimization approach
DEXA'10 Proceedings of the 21st international conference on Database and expert systems applications: Part I
Quality-driven query processing techniques in the MOMIS integration system
ADBIS'10 Proceedings of the 14th east European conference on Advances in databases and information systems
Aggregated search of data and services
Information Systems
Transactions on large-scale data- and knowledge-centered systems III
On the local closed-world assumption of data-sources
LPNMR'05 Proceedings of the 8th international conference on Logic Programming and Nonmonotonic Reasoning
Assessing the completeness of sensor data
DASFAA'06 Proceedings of the 11th international conference on Database Systems for Advanced Applications
Using ontologies for XML data cleaning
OTM'05 Proceedings of the 2005 OTM Confederated international conference on On the Move to Meaningful Internet Systems
Brokering multisource data with quality constraints
ODBASE'06/OTM'06 Proceedings of the 2006 Confederated international conference on On the Move to Meaningful Internet Systems: CoopIS, DOA, GADA, and ODBASE - Volume Part I
Declarative data fusion – syntax, semantics, and implementation
ADBIS'05 Proceedings of the 9th East European conference on Advances in Databases and Information Systems
A self-monitoring system to satisfy data quality requirements
OTM'05 Proceedings of the 2005 OTM Confederated international conference on On the Move to Meaningful Internet Systems: CoopIS, COA, and ODBASE - Volume Part II
Viewpoints on emergent semantics
Journal on Data Semantics VI
Provenance based conflict handling strategies
DASFAA'12 Proceedings of the 17th international conference on Database Systems for Advanced Applications
CARVE: Context-aware automatic view definition over relational databases
Information Systems
Completeness of queries over SQL databases
Proceedings of the 21st ACM international conference on Information and knowledge management
Using information quality for the identification of relevant web data sources: a proposal
Proceedings of the 14th International Conference on Information Integration and Web-based Applications & Services
A mediator-based approach for integrating heterogeneous multimedia sources
Multimedia Tools and Applications
Hi-index | 0.00 |
For many information domains there are numerous World Wide Web data sources. The sources vary both in their extension and their intension: They represent different real-world entities with possible overlap and provide different attriouites of these entities. Mediator-based information systems allow integrated access to such sources by providing a common schema against which the user can pose queries. Given a query, the mediator must determine which participating sources to access and how to integrate the incoming results.This article describes how to support mediators in their source selection and query planning process. We propose three new merge operators, which formalize the integration of multiple source responses. A completeness model describes the usefulness of a source to answer a query. The completeness measure incorporates both extensional value (called coverage) and intensional value (called density) of a source. We show how to determine the completeness of single sources and of combinations of sources under the new merge operators. Finally, we show how to use the measure for source selection and query planning.