687 search results - page 32 / 138 » Query Transformation for PSJ-Queries |
ER
2007
Springer
14 years 17 days ago
2007
Springer
The paper presents an unified Description Logic (DL) model for databases. Describing database models using DLs is a fundamental problem in many areas because it turns databases to...
VLDB
1994
ACM
14 years 21 days ago
1994
ACM
In existing relational database systems, processing of group-by and computation of aggregate functions are always postponed until all joins are performed. In this paper, we presen...
VLDB
1995
ACM
14 years 5 days ago
1995
ACM
We present a shape definition language, called SDC, for retrieving objects based on shapes contained in the histories associated with these objects. It is a small, yet powerful, l...
DBPL
1991
Springer
14 years 5 days ago
1991
Springer
We propose a programming paradigm that tries to get close to both the semantic simplicity of relational algebra, and the expressive power of unrestricted programming languages. It...
BIS
2008
13 years 10 months ago
2008
Deep web search requires a transformation between search keywords and semantically described and well-formed data structures. We approached this problem in our "In the Web of ...