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SBBD
2007
68views Database» more  SBBD 2007»
15 years 7 months ago
Querying Geographical Data Warehouses With GeoMDQL
Integrating geographical and multidimensional processing has been proposed in several researches in the database literature. One of the most important issues of this process is dat...
Joel da Silva, Ausberto S. Castro Vera, Anjolina G...
DGO
2003
127views Education» more  DGO 2003»
15 years 7 months ago
A Geographic Visual Query Composer (GVQC) for Accessing Federal Databases
The paper introduces a query tool which allows users (either database experts or non-specialist users) to visually formulate and execute spatial queries directed to large federal ...
Diansheng Guo
DEBU
1998
57views more  DEBU 1998»
15 years 5 months ago
Virtual Database technology, XML, and the Evolution of the Web
We describe Junglee’s Virtual Database (VDB) technology, which makes the World Wide Web and other external data sources behave as an extension of an enterprise’s relational da...
S. T. S. Prasad, Anand Rajaraman
PODS
2010
ACM
205views Database» more  PODS 2010»
15 years 11 months ago
Positive higher-order queries
We investigate a higher-order query language that embeds operators of the positive relational algebra within the simply-typed λ-calculus. Our language allows one to succinctly de...
Michael Benedikt, Gabriele Puppis, Huy Vu
LICS
2005
IEEE
15 years 11 months ago
Temporal Logics over Unranked Trees
We consider unranked trees, that have become an active subject of study recently due to XML applications, and characterize commonly used fragments of firstorder (FO) and monadic ...
Pablo Barceló, Leonid Libkin