The main tools for the preprocessor are regular expressions and [`sed`](https://www.gnu.org/software/sed/). These tools are used in order to translate `keys` for working groups or staff members into predefined values. These values are extracted from the corresponding files in [`/static`](Repository-Structure#static)
The main tools for the preprocessor are regular expressions and [`sed`](https://www.gnu.org/software/sed/). These tools are used in order to translate `keys` for working groups or staff members into predefined values. These values are extracted from the corresponding files in [`/static`](Repository-Structure#static).
The following image shows the header of a markdown file before and after the preprocessor run