8 search results - page 1 / 2 » Symmetric Relations and Cardinality-Bounded Multisets in Dat... |
VLDB
2004
ACM
13 years 10 months ago
2004
ACM
In a binary symmetric relationship, A is related to B if and only if B is related to A. Symmetric relationships between k participating entities can be represented as multisets of...
ICDE
1994
IEEE
13 years 9 months ago
1994
IEEE
The relational data model is based on sets of tuples, i.e. it does not allow duplicate tuples in a relation. Many database languages and systems do require multi-set place, the hi...
SIGMOD
1996
ACM
13 years 9 months ago
1996
ACM
Magic sets rewriting is a well-known optimization heuristic for complex decision-support queries. There can be many variants of this rewriting even for a single query, which diffe...
DASFAA
2007
IEEE
13 years 8 months ago
2007
IEEE
Abstract. OWL is a recommended language for publishing and sharing ontologies on the Semantic Web. To manage the ontologies, several OWL data management systems have been proposed....
PODS
2006
ACM
14 years 5 months ago
2006
ACM
Query containment is a fundamental algorithmic problem in database query processing and optimization. Under set semantics, the query-containment problem for conjunctive queries ha...