|
Abstract : |
A basic concept in object-oriented approaches is the notion of object as integrated unit of structure and behavior. Conceptually, objects are modeled as processes of which certain dynamic characteristics of their internal state can be observed using attributes. Objects are the basic units of design. Systems are composed from objects that interact to provide the desired services. In the semantics domain, concepts related to the object-oriented paradigm like interaction, inheritance and object aggregation can be uniformily modelled by object morphisms. In this paper we introduce the language T ROLL to conceptually specify dynamic information systems. T ROLL supports abstract description of temporal evolvement of objects, classification of objects, complex objects, active objects and specialization hierarchies. Additionally, the integration of concepts like modularization support, and component reusability into the T ROLL framework is briefly discussed. 1, |
