251 search results - page 31 / 51 » Rewriting Aggregate Queries using Description Logic |
DLOG
2004
13 years 9 months ago
2004
er reports on a pragmatic query language for Racer. The abstract syntax and semantics of this query language is defined. Next, the practical relevance of this query language is sh...
VLDB
1991
ACM
13 years 11 months ago
1991
ACM
We propose a two-pha.se algorithm for physical database design. In phase one the algorithm, for each logical query, losesrules to determine characteristics of a physical design (s...
TOG
2008
13 years 7 months ago
2008
This paper addresses the problem of interactively modeling large street networks. We introduce a modeling framework that uses tensor fields to guide the generation of a street gra...
ENTCS
2007
13 years 7 months ago
2007
Description Logics (DLs) are a family of logic based knowledge representation formalisms. Although they have a range of applications, they are perhaps best known as the basis for ...
ICDE
2007
IEEE
14 years 9 months ago
2007
IEEE
Logical constraints, (e.g., 'phone numbers in toronto can have prefixes 416, 647, 905 only'), are ubiquitous in relational databases. Traditional integrity constraints, ...