Information system accompanying the life cycle of data processing distributed system development

The concepts to develop the complex of instrumental projection tools (CIPT) for the data processing distributed systems (DPDS), are considered. Peculiarities of conceptual describing databases, queries, transactions, distributed systems of data processing architecture, are analysed. Approaches permitting to reduce essentially the initial data content necessary to describe the architecture versions of distributed system, are proposed. Opportunities to simulate a global network taking into consideration virtual channels and "tunnels" used to organise the data communication, are discussed. Examples of describing the distributed systems maintaining the client/server architecture within the Internet/Intranet technology, are presented.