Requirements list

Summary

I compiled in a file all the DPPS requirements in which the CalibPipe is involved.

For now it is under the form of a markdown file. It is however not very difficult to recover any layout (in a latex document) in a semi-automated way. I can do it later when we will have fixed a layout for the requirements in the concept document.

For now it can be useful for a quicker look-up in the requirements when writing use cases.