This essay pretends to bring to discussion some ideas for the clearing of the concept of measurement, and, from there, to the discussion of the nature of variables and their scales.

Information technologies that could be potentially used for the development of register system are currently highly advanced, but their practical adaptation in terms of register management is limited due to the void in the legal regulation. Therefore this article particularly focuses on analysis of legal regulation applied for the register system, by highlighting gaps, limitations in the legal acts regulating this area and offering resolutions of the problems. Author of the article reveals content of the category “system” and provides various (...) definitions for the term “system”. This article also includes various classification criteria for registers and revealing limitations of register classification. In addition underlining register system elements as well as general features of all the registers. The article lists register system as a complex, open, managable and purposeful system. Author concludes by stressing the importance of the register system interoperability and emphasizing that without it registers would be a “collection” of registers rather than a system. (shrink)