The study, carried out as part of the BrCris, Laguna and Oasisbr projects and portal, investigated the impact of digital repositories on the average number of citations of Brazilian scientific articles. The Oasisbr portal aggregates approximately 5 million digital objects and collects metadata on 421,243 journal articles deposited in Brazilian repositories. In parallel, the OpenAlex database provided 1,901,216 records of articles exclusively linked to Brazilian institutions. The comparative analysis between articles in scientific journals and repositories (Class 1) and those only in journals (Class 2) revealed that, on average, articles deposited in repositories receive 83.10% more citations. This growth varies according to the year of publication, percentile of the journals' h-index and field of knowledge, with Social Sciences standing out (+206.02%) and a drop in fields such as Engineering and Computer Science (-8.21%). The discussion suggests that the greater visibility promoted by repositories, especially in open-sharing practices, is a determining factor in the increase in citations. Repositories facilitate the dissemination of articles on platforms such as Google Scholar, increasing the likelihood of citation, even in lower-impact journals. We conclude that repositories are strategic tools for fostering the impact and reuse of scientific knowledge.

Data usage metrics are essential to inform repository administrators, funding agencies, and data authors and users about research impact. Like many open repositories, the DesignSafe Data Depot Repository (DDR), a natural hazards data repository, presents Make Data Count (MDC) compliant metrics for each published dataset. Over the last two years the DDR team has developed applications of MDC statistics for benchmarking levels of data usage and for examining usage patterns across time. These provide more revealing insights than a typical count of views or downloads per individual dataset. The applications leverage DesignSafe's extensive publication metadata, enabling a granular view of what data types are used, when, how much, and for how long. To date, the results have provided a picture of continued usage and stability in usage patterns for the majority of the repository's datasets. Other applications such as correlating MDC metrics with citation counts are in the works. The applications highlight the value of usage metrics which, in the form of longitudinal studies, can inform the implementation of long-term strategies to increase data usage, develop targeted data services, and to become more sustainable by demonstrating a repository's key role in the open research landscape.

In the 20 years since Open Repositories began, the importance of metadata in enabling equitable access to research outputs has only grown. Repositories play a crucial role in making scholarly content discoverable, interoperable, and reusable. This presentation will explore how repositories can enhance their metadata workflows by integrating with Crossref’s services. We will provide practical examples of how repositories can utilize Crossref’s metadata to enrich their records, link content persistently, and comply with FAIR data principles. By discussing best practices, we will demonstrate how this integration fosters interoperability and discoverability, supporting the Open Repositories community in the preservation of digital content.

This study evaluates the representativeness of 199,446 Brazilian publications simultaneously present in the repositories indexed by Oasisbr and in OpenAlex, considering the period from 2000 to 2024. A steady increase in the number of publications was observed over the years, except for small drops in 2014 and 2015 and again from 2022 onwards, attributed to the interval between publication, deposit and indexing. Around 7% of publications (13,976 articles) do not have a DOI, highlighting the need for strategies to generate persistent identifiers, especially in areas such as Medicine, Agronomy and Education. The integration of these databases and the adoption of persistent identifiers are fundamental to enriching local repositories, increasing the visibility of Brazilian science and strengthening interoperability and scientific communication in line with the principles of Open Science.