The article is devoted to the development of technology fundamentals to create models, methods for information system development supporting scientific activities integrated into an open semantic space, consistent with international standards and development trends of both national and international information infrastructure.They performed the implementation of conceptual model and the developed linguistic support of the information support system in scientific and educational activities using the IRIS software platform of ICS SB RAS (Intellectual Distributed Information System of the Institute of Computational Technologies at SB RAS).The purpose of the system is to satisfy two types of information needs from researchers: the need for information about the sources of necessary scientific information and the need for the most necessary scientific information. The development of a conceptual model is based on DELOS DLRM and OAIS RM models. The main entities used in the model, as well as their classes and subclasses, metadata and relation types, are highlighted and discussed in detail. The model is based on the concept of a document as the main essence of the scientific information space, which includes such classes as competencies, training courses, organizations, data storage facilities, conferences, persons, publications, research projects, grants as well as relationships between them.As the part of distributed information system, access technologies to distributed information resources (collections, databases, etc.) development it is logical to provide access to thesauri within client-server technology using the single standard ANSI/NISO Z39.50.