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AWIC
2005
Springer
14 years 3 months ago
Specifying Schema Mappings for Query Reformulation in Data Integration Systems
In data integration systems there is a problem of answering queries through a target schema, given a set of mappings between source schemas and the target schema, and given that th...
Tadeusz Pankowski
MEMOCODE
2003
IEEE
14 years 3 months ago
Executable Computational Logics: Combining Formal Methods and Programming Language Based System Design
An executable computational logic can provide the desired bridge between formal system properties and formal methods to verify them on the one hand, and executable models of syste...
José Meseguer
AB
2007
Springer
14 years 2 months ago
Reduction of Algebraic Parametric Systems by Rectification of Their Affine Expanded Lie Symmetries
Lie group theory states that knowledge of a m-parameters solvable group of symmetries of a system of ordinary differential equations allows to reduce by m the number of equations. ...
Alexandre Sedoglavic
TCS
2010
13 years 8 months ago
Left-forbidding cooperating distributed grammar systems
In a left-forbidding grammar, a set of nonterminals is attached to every context-free production, and such a production can rewrite a nonterminal if no symbol from the attached se...
Filip Goldefus, Tomás Masopust, Alexander M...
VLDB
2001
ACM
100views Database» more  VLDB 2001»
14 years 2 months ago
VXMLR: A Visual XML-Relational Database System
We demonstrate a visual based XML-Relational database system where XML data is managed by commercial RDBMS. A query interface enables users to form path expression based queries a...
Aoying Zhou, Hongjun Lu, Shihui Zheng, Yuqi Liang,...