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ER
2008
Springer
110views Database» more  ER 2008»
15 years 8 months ago
Conjunctive Query Containment under Access Limitations
Access limitations may occur when querying data sources over the web or heterogeneous data sources presented as relational tables: this happens, for instance, in Data Exchange and ...
Andrea Calì, Davide Martinenghi
ERCIMDL
2008
Springer
139views Education» more  ERCIMDL 2008»
15 years 8 months ago
A Framework for Managing Multimodal Digitized Music Collections
Abstract. In this paper, we present a framework for managing heterogeneous, multimodal digitized music collections containing visual music representations (scanned sheet music) as ...
Frank Kurth, David Damm, Christian Fremerey, Meina...
ESA
2008
Springer
134views Algorithms» more  ESA 2008»
15 years 8 months ago
A Near-Tight Bound for the Online Steiner Tree Problem in Graphs of Bounded Asymmetry
The edge asymmetry of a directed, edge-weighted graph is defined as the maximum ratio of the weight of antiparallel edges in the graph, and can be used as a measure of the heterog...
Spyros Angelopoulos
ESWS
2008
Springer
15 years 8 months ago
xOperator - An Extensible Semantic Agent for Instant Messaging Networks
Instant Messaging is in addition to Web and Email the most popular service on the Internet. With xOperator we demonstrate the implementation of a strategy which deeply integrates I...
Sebastian Dietzold, Jörg Unbehauen, Söre...
ESWS
2008
Springer
15 years 8 months ago
SWING: An Integrated Environment for Geospatial Semantic Web Services
Geospatial Web services allow to access and to process Geospatial data. Despite significant standardisation efforts, severe heterogeneity and interoperability problems remain. The ...
Mihai Andrei, Arne-Jørgen Berre, Luis Costa...