ABSTRACT
Digitalization is on path of fast development in all spheres of society. As an outcome the requirements on modeling of systems are increasing. This applies with regard to quantity and quality. In this context the tools for modeling have to be selected. Considering modeling a possible choice is the language Modelica. This language comprises different advantages, finally supporting safe use and effective reuse of already developed components. Especially Modelica is an efficient approach to model acausal interaction between objects, which practically occurs fairly in every system, in technical systems typical for mechanical engineering e.g. The text comes with possible views on the term digital twin, which seems not to be defined exactly. It continues with Modelica, its properties and advantages for the creation of digital twins. Summarized the text should give some support to get acquainted, to evaluate and to decide on the usage of Modelica.
