The aim of the Prague Relational Learning Repository is to support machine learning research with multi-relational data. The repository currently contains 148 SQL databases hosted on a public MySQL server located at \url{https://relational-data.org}. The server is provided by getML to support the relational machine learning community (\url{www.getml.com}). A searchable meta-database provides metadata (e.g., the number of tables in the database, the number of rows and columns in the tables, the number of self-relationships).

翻译：布拉格关系学习数据库中心的宗旨是利用多关系数据支持机器学习研究。该数据库目前包含148个结构化查询语言（SQL）数据库，托管在位于\url{https://relational-data.org}的公共MySQL服务器上。该服务器由getML提供，旨在支持关系机器学习社区（\url{www.getml.com}）。一个可搜索的元数据库提供了元数据（例如，数据库中的表数量、表中行和列的数量、自关系的数量）。