117 search results - page 19 / 24 » Relation Algebra Operations on Formal Contexts |
LICS
2010
IEEE
14 years 8 months ago
2010
IEEE
Psi-calculi extend the pi-calculus with nominal datatypes to represent data, communication channels, and logics for facts and conditions. This general framework admits highly expr...
VLDB
2004
ACM
15 years 3 months ago
2004
ACM
We study the fundamental limitations of relational algebra (RA) and SQL in supporting sequence and stream queries, and present effective query language and data model enrichments ...
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SDB
1995
15 years 1 months ago
1995
Most of work on partial information in databases asks which operations of standard languages, like relational algebra, can still be performed correctly in the presence of nulls. In...
ICFP
2010
ACM
14 years 11 months ago
2010
ACM
Bidirectional transformations provide a novel mechanism for synchronizing and maintaining the consistency of information between input and output. Despite many promising results o...
ZUM
2000
Springer
15 years 1 months ago
2000
Springer
: Retrenchment is introduced as a liberalisation of refinement intended to address some of the shortcomings of refinement as sole means of progressing from simple abstract models t...