General information

The computer system "KARKAS" allows both to develop knowledge bases, prototypes of expert systems, and can be used for adapted testing and teaching students over a local network.
The model ontology subject domain in system "KARKAS", consists of hierarchy of classes of subject domain, communications between them (conclusion rules) which operate within the limits of this model. In system the interpretation mechanism ontology in the conditions of dynamic change of its parametres (a base class, communications between classes and interactions of objects of classes) is offered. The system is constructed by a modular principle and for this reason has possibility of connection of other additional modules. In architecture of system it is possible to allocate following basic modules: the loader; the module for working out knowledge base; the consultation module; the module cluster analysis the data.
The subject domain model is considered as functional system in which the result makes organising impact on all stages of formation онтологии. Classes and communications between it can be considered as a logic design of functional system.
In system "KARKAS" the functional system is the formalized reflexion of subject domain in the form of hierarchical structure of a set of managing directors a component which co-operate among themselves for overall objective achievement.

The main components of ″KARKAS″ are as follows: agent of the visual editor of the knowledge base; inference agent (direct, reverse, indirect inference, Bayes formula); explanation subsystem agent; test analyzer agent; teacher module; training subsystem.
In the mode of testing the user's knowledge, the software implementation of the system is based on the use of client-server technology based on socket programming. At the same time, the system implements client-server interaction: a thick client is a thin server, that is, the server part implements only access to system resources (user identification, establishing a connection with him and receiving test scores from him), and the main part of the application (input machine agent, subsystem explanation, knowledge base) is located on the client.
The main task of the ″KARKAS″ system is to provide the user with the opportunity to acquire knowledge, skills, abilities (competences) in creating knowledge base models.