Persistence

Abstract

In the recent past, object-oriented concepts have found their practical usage in more and more applications, especially in so-called non-standard fields such as CAD/CAM, software engineering, or design systems in general, object- orientation has been chosen in those systems because of its capabilities to deal with complex data structures and associated behavior while still providing for modularization and object independence by the concept of encapsulation. The same situation with the object modeling requirements are found in Nestor, which have been extensively discussed earlier in this document. We have proposed to adapt one of the most popular approaches to object-orientation in order to serve the needs of Nestor: the Smalltalk language and environment in an enhanced form as an “object kernel” to which other services are then connected.