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» Visualization of mappings between schemas
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DGO
2003
113views Education» more  DGO 2003»
13 years 9 months ago
Resolving Schema and Value Heterogeneities for XML Web Querying
To query XML data over the Web, query engines need to be able to resolve semantic differences between heterogeneous attributes that are conceptually similar. This demo presents a ...
Nancy Wiegand, Naijun Zhou, Stephen J. Ventura, Is...
JODS
2006
148views Data Mining» more  JODS 2006»
13 years 8 months ago
Discovering the Semantics of Relational Tables Through Mappings
Abstract. Many problems in Information and Data Management require a semantic account of a database schema. At its best, such an account consists of formulas expressing the relatio...
Yuan An, Alexander Borgida, John Mylopoulos
PODS
2012
ACM
253views Database» more  PODS 2012»
11 years 11 months ago
Local transformations and conjunctive-query equivalence
Over the past several decades, the study of conjunctive queries has occupied a central place in the theory and practice of database systems. In recent years, conjunctive queries h...
Ronald Fagin, Phokion G. Kolaitis
EDBT
2010
ACM
200views Database» more  EDBT 2010»
14 years 3 months ago
Rewrite techniques for performance optimization of schema matching processes
A recurring manual task in data integration, ontology alignment or model management is finding mappings between complex meta data structures. In order to reduce the manual effor...
Eric Peukert, Henrike Berthold, Erhard Rahm
ICDE
2008
IEEE
171views Database» more  ICDE 2008»
14 years 9 months ago
Usage-Based Schema Matching
Existing techniques for schema matching are classified as either schema-based, instance-based, or a combination of both. In this paper, we define a new class of techniques, called ...
Hazem Elmeleegy, Mourad Ouzzani, Ahmed K. Elmagarm...