In SISTEMA, safety-related parts of a control system (SRP/CS) are engineered from subsystems, blocks and elements - components for industrial use which can generally be purchased commercially - for which the user enters various values and information. Component manufacturers describe these data, for example in data sheets or in catalogues, but may also make them available to SISTEMA users in the form of SISTEMA libraries. The benefit to the user: he can copy these data from a library into a SISTEMA project, quickly and without error.

https://www.dguv.de/ifa/praxishilfen/practical-solutions-machine-safety/software-sistema/sistema-bibliotheken/index.jsp