The purpose of the study was to comprehensively investigate documentation technologies in electronic document management systems of the public sector of Ukraine, with an emphasis on their legal, technical, and organisational interaction. Methodologically, the research was based on an integrated approach, including comparative legal analysis of legislation, content analysis of state information systems, structural, functional, and statistical methods, which were used to study the practical implementation of digital document management in Ukraine. As a result, it was established that the regulatory framework of Ukraine creates sufficient conditions for the functioning of electronic document management, but in practical terms there is a significant fragmentation in the application of metadata standards and exchange protocols. Analysis of the technological infrastructure has shown that the main document management systems differ in the level of security, integration and compatibility with state platforms, which leads to the emergence of information barriers between institutions. Structural and functional analysis revealed that the Trembita system became the central link of interagency interaction, but simultaneously increased the risks of cyber-attacks, as evidenced by the increase in incidents in 2024 by 69.8%. The use of content analysis showed that the Diia and Prozorro systems have provided an increase in digital trust of citizens, but remain vulnerable to problems of authenticity of electronic documents and stability of long-term storage. The data obtained also showed that the introduction of cloud technologies, artificial intelligence, and blockchain audit are factors for future improvement of transparency and efficiency of state document management. The conclusions indicate that documentation technologies are becoming the main tool not only for digitalising administrative processes, but also for building trust between the state and society. The practical significance of the study lies in the possibility of using the results obtained to develop public strategies for digital integration, optimise document flow, and create a single electronic document management platform in accordance with European standards