# Specifications for datastructures, interfaces, and file formats

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