Database management systems will continue to manage large data volumes. Thus, efficient
algorithms for accessing and manipulating large sets and sequences will be required to …

The data model upon which most of today's commercial database management systems are
based has shown to be insufficient for geographic information systems (GISs). The recently …

The application of traditional database query languages, primarily the Structured Query
Language SQL, for geographical information systems (GIS) and other non–standard …

Non-temporal data models and their implementations as database management systems
(DBMS) capture a single state of the real world, usually the current one. They support …

The relational model and its extensions are often considered incompatible with object-
orientation. However, on the one hand nested relations provide the complex object features …

Incorporating abstraction methods, such as aggregation and association, into information
system design methodologies has improved our ability to model the real world. The …

Die Anforderungen an die Anfrageverarbeitung im Datenbank-Bereich steigen. Neue
Entwicklungstendenzen sind hierfür maßgeblich: Erweiterte Datenmodelle, Parallele …

Over the last few years, object-orientation has gained more and more importance within
several disciplines of computer science (eg programming languages, knowledge …

Support for temporal data continues to be a requirement posed by many applications such
as VLSI design and CAD, but also in conventional applications like banking and sales …

We present SQL/TC, an extension of SQL, to allow the expression of generalized transitive
closure queries. The extension permits the user to pose queries that compute paths between …