A modern approach to the creation and integration of library digital information resources

The paper presents an overview of the software and functionalities of the Scientific Digital Library of Periodicals of the National Academy of Sciences of Ukraine. It also considers the issues of integration of library systems into unified user service systems on the example of modern global aggregators of open access documents BASE, OpenAIRE and CORE. Their quantitative characteristics, such as the number of collected document descriptions and full texts, the number of data providers, and the availability of an application programming interface for data retrieval are analyzed. The composition and types of their data providers, such as institutional repositories, open journals, publishing houses, scientific repositories of preprints, thematic digital libraries, and systems that are also aggregators, are considered. We also investigated what kind of information about documents these aggregators collect and how it is presented in the user interface, as well as what information is collected about data providers and how it is presented in the user interface. How the aggregator interacts with data providers, what data exchange protocols are supported, and how the collected data is updated. The article provides a list of useful services for researchers that can be provided by modern aggregators based on collected data corpora, using machine learning methods, bibliometrics, webometrics, altmetrics, and semantometrics. As developers of a number of open access scientific digital libraries, we are already registered as data providers in these systems. At present, work is underway to create an aggregator of scientific resources of the National Academy of Sciences of Ukraine, so studying the world experience is a necessary step to solve this problem at the proper level.