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VLDB
1995
ACM
150views Database» more  VLDB 1995»
15 years 4 months ago
Procedures in Object-Oriented Query Languages
We follow the stack-baaed approach to query languages which is a new formal and intellectual paradigm for integrating querying and programming for object-oriented databases. Queri...
Kazimierz Subieta, Yahiko Kambayashi, Jacek Leszcz...
IS
2007
15 years 21 days ago
Semantic optimization techniques for preference queries
Preference queries are relational algebra or SQL queries that contain occurrences of the winnow operator (find the most preferred tuples in a given relation). Such queries are pa...
Jan Chomicki
111
Voted
DEXA
2008
Springer
85views Database» more  DEXA 2008»
15 years 2 months ago
Reordering of Location Identifiers for Indexing an RFID Tag Object Database
The query performance for tracing tags depends upon the distribution of tag trajectories in the data space. We examine a more efficient representation of tag trajectories by means ...
Sungwoo Ahn, Bonghee Hong
104
Voted
SMC
2010
IEEE
124views Control Systems» more  SMC 2010»
14 years 11 months ago
SoftFacts: A top-k retrieval engine for ontology mediated access to relational databases
—We outline SoftFacts, an ontology mediated top-k information retrieval system over relational databases. An ontology layer is used to define (in terms of a OWL-QL like Semantic...
Umberto Straccia
112
Voted
OTM
2007
Springer
15 years 7 months ago
Leveraging the Expressivity of Grounded Conjunctive Query Languages
We present a pragmatic extension of a Semantic Web query language (including so-called grounded conjunctive queries) with a termination safe functional expression language. This ad...
Alissa Kaplunova, Ralf Möller, Michael Wessel