eCl@ss is the language for industry 4.0. As the leading standard for electronic data-exchange, eCl@ss describes products and services unambiguously across all industries. Providing more than 41,000 classes and 17,000 properties, eCl@ss is established on national and international markets. The continouus development of the standard is based on ISOnorms. In this manner, eCl@ss shows its potential in consensual semantics and enables industry 4.0.