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192
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SAC
2009
ACM
15 years 11 months ago
Leveraging OWL for GIS interoperability: rewards and pitfalls
Information systems often require combining datasets available in different formats, and geographical information systems are no exception. While semantic technologies have been u...
Serge Boucher, Esteban Zimányi
EDBT
2009
ACM
135views Database» more  EDBT 2009»
15 years 11 months ago
Provenance for nested subqueries
Data provenance is essential in applications such as scientific computing, curated databases, and data warehouses. Several systems have been developed that provide provenance fun...
Boris Glavic, Gustavo Alonso
211
Voted
GIS
2009
ACM
15 years 11 months ago
A multidimensional model representing continuous fields in spatial data warehouses
Data warehouses and On-Line Analytical Processing (OLAP) provide an analysis framework supporting the decision making process. In many application domains, complex analysis tasks ...
Alejandro A. Vaisman, Esteban Zimányi
SSD
2009
Springer
128views Database» more  SSD 2009»
15 years 11 months ago
TOQL: Temporal Ontology Querying Language
We introduce TOQL, a query language for querying time information in ontologies. TOQL is a high level query language that handles ontologies almost like relational databases. Queri...
Evdoxios Baratis, Euripides G. M. Petrakis, Sotiri...
202
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DBPL
2001
Springer
115views Database» more  DBPL 2001»
15 years 11 months ago
Optimization Properties for Classes of Conjunctive Regular Path Queries
Abstract. We are interested in the theoretical foundations of the optimization of conjunctive regular path queries (CRPQs). The basic problem here is deciding query containment bot...
Alin Deutsch, Val Tannen