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 https://relational.fel.cvut.cz. The server is provided by the Czech Technical University (CTU). 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：布拉格关系学习知识库旨在为多关系数据的机器学习研究提供支持。该知识库目前包含148个SQL数据库，托管于位于https://relational.fel.cvut.cz的公共MySQL服务器上。该服务器由捷克技术大学（CTU）提供。一个可检索的元数据库提供了元数据（例如，数据库中的表数量、表中的行数和列数、自关联关系的数量）。