2. Self-organizing information systems
The organization of Self-organizing Information System has the following features:
1. SIS is to be designed as a system of interacting adaptive components which possess a high level of autonomy. This is necessary for launching of the process of co-evolution of components and their improvement via self-learning during functioning of SIS.
2. В SIS possess the following subsystems::
functional subsystem which contains functions useful for users, and this allows SIS to operate during a long period of time;
informational subsystem implementing data organization, data storing and data processing necessary for normal functioning and improving SIS;
subsystem of optimization and adaptation providing (with permissible level of correctness) increasing of effectiveness of SIS functioning and increasing of components functioning coordination, changing of structure and functions of SIS's components, deleting of not valuable components and relations between them, revealing activity in producing new types of relations and ways of interaction between components and revelation of regularities (knowledge) in current situation, and also increasing adequacy to internal environment on basis of analysis and prognostication of its structure and behavior;
survival support subsystem implementing (with permissible level of losing correctness) increasing stability and reliability of SIS functioning by protection against failures and destruction of a system, revealing activities in gaining necessary resources for normal functioning, and also recovery of normal SIS functioning when partial loss of working capacity happens;
interface subsystem implementing SIS means and methods for interacting with external environment, and also registering different changes in external environment and deviations of external environment's interaction with SIS;
control subsystem fulfilling the control of resources, subsystems and processes in SIS in whole.
3. The more common SIS architecture can contain four levels of organization: external (user) interface, conceptual data domain model, evolutionary database and system isomorphism support mechanism between data domain model and database.
Named features of SIS organization allow it to gain new properties as follows:
Openness of SIS at all levels of organization provides its wide-ranging evolution during functioning;
Self-learning and further support of holistic and reliable knowledge system on different levels of organization allow SIS to perfect itself during of functioning;
Self-correction and self-constructing allow SIS to survive in either aggressive or rather changeable environments;
Activeness provides SIS's functioning mainly on basis of internal demands and allows it to survive in environments with limited resources;
Adaptability allows SIS to accommodate itself both to changes of environment and internal organization and even to form (collate) its nearest external environment for creating more comfortable conditions of functioning;
Interaction with system of users will allow to launch the co-evolution process between SIS and environment, leading to emerging the system of higher hierarchical level on basis of their intensive interaction.
Disadvantages of SIS are the following: high uniqueness, a long initial period of uneffective functioning and high complexity accompanied by relative redundancy of a system.