Accommodating imprecision in database systems: issues and solutions
ACM SIGMOD Record - Directions for future database research & development
Communications of the ACM
Extending OLAP querying to external object databases
Proceedings of the ninth international conference on Information and knowledge management
Query optimization for OLAP-XML federations
Proceedings of the 5th ACM international workshop on Data Warehousing and OLAP
AIMQ: a methodology for information quality assessment
Information and Management
Quality-driven Integration of Heterogenous Information Systems
VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
YAM2 (Yet Another Multidimensional Model): An Extension of UML
IDEAS '02 Proceedings of the 2002 International Symposium on Database Engineering & Applications
Estimating the Quality of Databases
FQAS '98 Proceedings of the Third International Conference on Flexible Query Answering Systems
Implementing operations to navigate semantic star schemas
DOLAP '03 Proceedings of the 6th ACM international workshop on Data warehousing and OLAP
A framework for analysis of data freshness
Proceedings of the 2004 international workshop on Information quality in information systems
Research in data warehouse modeling and design: dead or alive?
DOLAP '06 Proceedings of the 9th ACM international workshop on Data warehousing and OLAP
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In this work we propose, for an environment where multidimensional queries are made over multiple Data Marts, techniques for providing the user with quality information about the retrieved data. This meta-information behaves as an added value over the obtained information or as an additional element to take into account during the proposition of the queries. The quality properties considered are freshness, availability and accuracy. We provide a set of formulas that allow estimating or calculating the values of these properties, for the result of any multidimensional operation of a predefined basic set.