The recommended standard-regulating maintenance of a system for conducting the Scientific and technical library catalogs provided an opportunity to make the information system order more refinement. In the paper have been addressed issues of regulations and methodologies of electronic catalog system change considered. The analysis of the current state of the data processing and catalogs using of the Scientific and technical library was held. The task of expanding STL product rubricator was carried out under the proposed rules of the system modification. Expansion of the classifier required the updates of architecture objects and data system; as a result of the use of the developed adjusting tables and their relationship it has been able to realize the original task with minimal system changes. So, to increase a number of product classification levels a set of custom tables, their relationships and program amendments were proposed, as well, as organization, correction and harmonization of system catalog lingware accompanied. Work and document flows defined for support and change production usage of electronic catalog system in Moscow technological university.
