6 search results - page 1 / 2 » A Multi-Set Extended Relational Algebra - A Formal Approach ... |
ICDE
1994
IEEE
13 years 8 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...
ADC
2005
Springer
13 years 10 months ago
2005
Springer
The design and implementation of advanced personalized database applications requires a preference-driven approach. Representing preferences as strict partial orders is a good cho...
COOPIS
2002
IEEE
13 years 9 months ago
2002
IEEE
This paper presents a specifically database-inspired approach (called DOGMA) for engineering formal ontologies, implemented as shared resources used to express agreed formal semant...
FOIS
2006
13 years 5 months ago
2006
An ontology alignment is the expression of relations between different ontologies. In order to view alignments independently from the language expressing ontologies and from the te...
SACMAT
2009
ACM
13 years 11 months ago
2009
ACM
Many access control policy languages, e.g., XACML, allow a policy to contain multiple sub-policies, and the result of the policy on a request is determined by combining the result...