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PODS
2004
ACM
158views Database» more  PODS 2004»
16 years 6 months ago
Composing Schema Mappings: Second-Order Dependencies to the Rescue
A schema mapping is a specification that describes how data structured under one schema (the source schema) is to be transformed into data structured under a different schema (the...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
ECHT
1992
15 years 10 months ago
Design Issues for a Dexter-Based Hypermedia System
This paper discusses experiences and lessons learned from the design of an open hypermedia system, one that integrates applications and data not "owned" by the hypermedi...
Kaj Grønbæk, Randall H. Trigg
ACSD
2006
IEEE
106views Hardware» more  ACSD 2006»
16 years 19 days ago
Synchronous + Concurrent + Sequential = Earlier than + Not later than
In this paper, we show how to obtain causal semantics distinguishing ”earlier than” and ”not later than” causality between events from algebraic semantics of Petri nets. J...
Gabriel Juhás, Robert Lorenz, Sebastian Mau...
SEFM
2006
IEEE
16 years 17 days ago
Modeling Heterogeneous Real-time Components in BIP
We present a methodology for modeling heterogeneous real-time components. Components are obtained as the superposition of three layers : Behavior, specified as a set of transitio...
Ananda Basu, Marius Bozga, Joseph Sifakis
HPCC
2005
Springer
16 years 3 days ago
Distributed Query Optimization in the Stack-Based Approach
Abstract. We consider query execution strategies for object-oriented distributed databases. There are several scenarios of query decomposition, assuming that the corresponding quer...
Hanna Kozankiewicz, Krzysztof Stencel, Kazimierz S...