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» Schema Mapping as Query Discovery
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CAISE
2006
Springer
14 years 1 months ago
An Interactive, Asymmetric and Extensional Method for Matching Conceptual Hierarchies
Our work deals with schema or ontology matching and is driven by the following statements: (1) Most of works only consider intensional description of schemas; (2) They mostly use s...
Jérôme David, Fabrice Guillet, R&eacu...
PVLDB
2010
204views more  PVLDB 2010»
13 years 8 months ago
Cheetah: A High Performance, Custom Data Warehouse on Top of MapReduce
Large-scale data analysis has become increasingly important for many enterprises. Recently, a new distributed computing paradigm, called MapReduce, and its open source implementat...
Songting Chen
FODO
1998
Springer
214views Algorithms» more  FODO 1998»
14 years 1 months ago
Querying Composite Objects in Semistructured Data
In this paper, we propose an entity-based style of queries for semistructured data. First, we partition a semistructured data into subgraphs corresponding to real-world entities, ...
Keishi Tajima
ICDE
2006
IEEE
119views Database» more  ICDE 2006»
14 years 11 months ago
Laws for Rewriting Queries Containing Division Operators
Relational division, also known as small divide, is a derived operator of the relational algebra that realizes a many-to-one set containment test, where a set is represented as a ...
Ralf Rantzau, Christoph Mangold
GLOBE
2009
Springer
14 years 2 months ago
Designing, Specifying and Querying Metadata for Virtual Data Integration Systems
Abstract. We show how to specify and use the metadata for a virtual and relational data integration system under the local-as-view (LAV) approach. We use XML and RuleML for represe...
Leopoldo E. Bertossi, Gayathri Jayaraman