scope:

This European Standard specifies the process and technical requirements for the development of software for programmable electronic systems for use in rolling stock applications. Software that is part of signalling equipment (railway control and protection applications) installed on board trains is outside the scope of this standard. Software that does not perform railway applications and which does not interface with rolling stock functions is outside the scope of this standard, if it is segregated from railway application software. This European Standard is applicable exclusively to software and the interaction between software and the system of which it is part.