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COOPIS
2003
IEEE
15 years 10 months ago
Flora-2: A Rule-Based Knowledge Representation and Inference Infrastructure for the Semantic Web
Abstract. Flora-2 is a rule-based object-oriented knowledge base system designed for a variety of automated tasks on the Semantic Web, ranging from meta-data management to informat...
Guizhen Yang, Michael Kifer, Chang Zhao
ICDT
2003
ACM
127views Database» more  ICDT 2003»
15 years 9 months ago
Incremental Validation of XML Documents
We investigate the incremental validation of XML documents with respect to DTDs and XML Schemas, under updates consisting of element tag renamings, insertions and deletions. DTDs ...
Yannis Papakonstantinou, Victor Vianu
DEXAW
2002
IEEE
79views Database» more  DEXAW 2002»
15 years 9 months ago
Understanding the Behavior of the Conflict-Rate Metric in Optimistic Peer Replication
Optimistic replication of data is a widely used tool for mobile environments, but the behavior of concurrent conflicting updates caused by the relaxed consistency model is poorly ...
An-I Wang, Peter L. Reiher, Rajive Bagrodia, Geoff...
DEXAW
2007
IEEE
124views Database» more  DEXAW 2007»
15 years 8 months ago
XML Query Optimisation: Specify your Selectivity
The problem of efficiently evaluating XPath and XQuery queries has become increasingly significant since more and more XML data is stored in its native form. We propose a novel op...
Sven Hartmann, Sebastian Link
DEXA
2008
Springer
154views Database» more  DEXA 2008»
15 years 6 months ago
Approximate Range-Sum Queries over Data Cubes Using Cosine Transform
In this research, we propose to use the discrete cosine transform to approximate the cumulative distributions of data cube cells' values. The cosine transform is known to have...
Wen-Chi Hou, Cheng Luo, Zhewei Jiang, Feng Yan, Qi...