Unified views

Unified Class Evolution by Object-Oriented Views

Object-oriented databases are said to support evolution and incremental development. On the schema level, a rm restriction in this evolution is that it can only be done by evolving class hierarchies downwards by subclassing. We show a uni ed approach to class evolution in object-oriented databases, where class hierarchies are allowed to grow in all directions, covering for evolution situations ...

Unified Data Access/query over Integrated Data-views for Decision Making in Geographic Information Systems

Geographic information is critical for building disaster planning, crisis management and early-warning systems. Decision making in Geographic Information Systems (GIS) increasingly relies on analyses of spatial data in map-based formats. Maps are complex structures composed of layers created from distributed heterogeneous data belonging to the separate organizations. This chapter presents a dis...

Views, change and changing views

European Journal of Information Systems (2006) 15, 239–240. doi:10.1057/palgrave.ejis.3000627 In the third issue of the 2005 volume of the European Journal of Information Systems, I introduced a new Editor’s View series to the journal, starting with mine (Paul, 2005). In this issue, I am pleased to present the second and third Editor’s View papers by the Editors of the Information Systems Journ...

MEDICAL NEWS AND VIEWS

SBQL Views - Prototype of Updateable Views

In this paper we describe a prototype implementation of updateable views called “SBQL Views”. The prototype follows a novel approach to view updates based on the Stack-Based Approach to object-oriented and XMLoriented query languages. The SBQL Views prototype is implemented on top of the SBQL query language for the XML DOM model. The novelty of the approach consists in augmenting a view definit...