In this report will describe a technological approach for developing a model of information system to support the scientific and educational activities, organized in the form of a digital library. The information system architecture, the principles of integration with digital depository and the rules of metadata representation and transformation are described. Special emphasis is put on work with dictionary of key terms, that are used for information resources organization and classification, and on modeling relations with the facts. The identification of information resources is very important. Also it is necessary to support the search by attributes, full-text search, browse by categories and dictionary-classifiers and it is desirable to support semantic search. Based on the stated requirements for the digital library, the layered architecture of its organization is proposed.