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» Engineering Semantic Web Information Systems in Hera
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EDBTW
2006
Springer
15 years 10 months ago
Semantically Correct Query Answers in the Presence of Null Values
For several reasons a database may not satisfy a given set of integrity constraints (ICs), but most likely most of the information in it is still consistent with those ICs; and cou...
Loreto Bravo, Leopoldo E. Bertossi
COOPIS
2002
IEEE
15 years 11 months ago
Well-Founded Optimism: Inheritance in Frame-Based Knowledge Bases
Abstract. F-logic is a popular formalism for knowledge-intensive applications and, especially, for ontology management in Semantic Web. However, the original F-logic’s semantics ...
Guizhen Yang, Michael Kifer
WWW
2010
ACM
16 years 1 months ago
Alhambra: a system for creating, enforcing, and testing browser security policies
Alhambra is a browser-based system designed to enforce and test web browser security policies. At the core of Alhambra is a policyenhanced browser supporting fine-grain security ...
Shuo Tang, Chris Grier, Onur Aciiçmez, Samu...
FOSSACS
2003
Springer
15 years 11 months ago
Manipulating Trees with Hidden Labels
We define an operational semantics and a type system for manipulating semistructured data that contains hidden information. The data model is simple labeled trees with a hiding op...
Luca Cardelli, Philippa Gardner, Giorgio Ghelli
WWW
2002
ACM
16 years 7 months ago
Probabilistic question answering on the web
Web-based search engines such as Google and NorthernLight return documents that are relevant to a user query, not answers to user questions. We have developed an architecture that...
Dragomir R. Radev, Weiguo Fan, Hong Qi, Harris Wu,...