Note 1: A system may be present as a component in a further I4.0 system.
Note 2: An I4.0 system must define a relation to the I4.0 platform.
Note 3: Flexibility, transformability, etc. are features of an I4.0 system.
Source: Industrie 4.0 – Begriffe/Terms, VDI Statusreport Industrie 4.0 (April 2017)