Modeling time: Adequacy of three distinct time concepts for temporal databases
In this paper we present newly elaborated time concepts for precise and lossless information preservation in temporal databases. First...
Towards a unifying logic formalism for semantic data models
In the paper we look for the solution of two problems: the unification of various paradigms of semantic database...
Knowledge-based approach for abstracting hierarchical and network schema semantics
Semantic meanings are lost in existing schema once the conceptual model has been mapped into logical model. To recapture...
Functional dependencies generalized for temporal databases that include object-identity
Normalization theory for relational databases is based on the construct of functional dependency. In this paper, we extend the...
The role of meta models in federating system modelling techniques
Given the large number of system modelling techniques currently available, and the continual need to develop new and improved...
Temporal extensions to a uniform behavioral object model
We define temporal extensions to a uniform, behavioral and functional object model by providing an extensible set of structural...
TOOSQL- a temporal object-oriented query language
This paper proposes a temporal, object-oriented query language called TOOSQL which has an SQL-like syntax and compares it with...
A taxonomy for schema versioning based on the relational and Entity Relationship Models
Recently there has been increasing interest in both the problems and the potential of accommodating evolving schema in databases,...
Neighborhood/conceptual query answering with imprecise/incomplete data
The evolution of database systems tends to the development of higher degree of user-friendliness such that the system can...
The entity-relationship model for multilevel security
A design environment for security critical database applications that should be implemented by using multilevel technology is proposed. For...
