# Specifications for datastructures, interfaces, and file formats

* **[Generic datastructure specifications](https://github.com/ClusterCockpit/cc-specifications/tree/master/datastructures)**: To be used in applications, as payloads in apis, or as file formats.
* **[APIs offered by ClusterCockpit](https://github.com/ClusterCockpit/cc-specifications/tree/master/interfaces)**: REST, GraphQL, and Influx Line protocol descriptions.
* **[HPC Job-Archive specification](https://github.com/ClusterCockpit/cc-specifications/tree/master/job-archive)**: A directory tree and file format description for a file based HPC Job Performance archive.
* **[SQL Jobs Table Schema](https://github.com/ClusterCockpit/cc-specifications/tree/master/schemas)**: The SQL database schema used in cc-backend.