Methodology for the development of a distributed information system

The article deals with some applied aspects of the design of a distributed information system. The structure of the system is proposed, including components for storing, processing and caching data. The proposed universal storage unit is compatible with relational and non-relational database management systems. The issues of data access control and two approaches for ensuring data integrity and consistency are considered. Both approaches use a transaction as a unit of data exchange. The first approach involves the transfer of extended information about the transaction, including the sequence of actions and the context of the transaction. The second approach is based on the formal language theory and involves transferring only the context. The advantages and disadvantages of each of the approaches are considered.