Linux kernels v2.6.14 v3.18.129 v6.14.2 processed by CScout

This dataset contains three SQLite databases containing a full image of the Linux kernel in relational form, as generated by the CScout refactoring browser (version 03023d - 2024-08-30 and version afdd54 - 2025-04-19) piping its output to SQLite (version 3.46.0 2024-05-23. The datasets can be used to perform empirical research on the Linux kernel's source code, especially identifier semantics, which they represent in the form of equivalence classes. They form part of the replication package of the paper titled “You Are not Expected to Understand this: The Usage of the C Preprocessor in the Linux Kernel”.