ICDT
1995
ACM
14 years 3 months ago
1995
ACM
Partial information in databases can arise when information from several databases is combined. Even if each database is complete for some \world", the combined databases wil...
ICDT
1995
ACM
14 years 3 months ago
1995
ACM
Abstract. Extension of the relational database model to represent complex data has been a focus of much research in recent years. At the same time, an alternative extension of the ...
ICDT
1995
ACM
14 years 3 months ago
1995
ACM
A tuple t1 of relation R subsumes tuple t2 of R, with respect to a query Q if for every database, tuple t1 derives all, and possibly more, answers to query Q than derived by tuple ...
ICDT
1995
ACM
14 years 3 months ago
1995
ACM
ICDE
1995
IEEE
14 years 3 months ago
1995
IEEE
ICDE
1995
IEEE
14 years 3 months ago
1995
IEEE
IDEAS
1997
IEEE
14 years 3 months ago
1997
IEEE
We are concerned by schema evolution in Object Oriented Databases (OODB) that is processed by a modification on the classes on the schema. We present a new categorization of the d...
ER
1995
Springer
14 years 3 months ago
1995
Springer
Abstract. This paper presents techniques for reverse engineering of relational database applications. The target of such an effort is the definition of a fully equipped object-orie...
ER
1995
Springer
14 years 3 months ago
1995
Springer
We describe a (meta) formalism for defining a variety of (object oriented) data models in a unified framework based on a variation of first-order logic. As specific example we use...
ER
1995
Springer
14 years 3 months ago
1995
Springer
Based on a systematic study of the semantics of temporal attributes of entities, this paper provides new guidelines for the design of temporal relational databases. The notions of ...