Languages for model description are familiar and widespread in information technology and
automation. In many cases, however, they are oriented towards software systems and cannot be
applied on a 1:1 basis to the modelling of technical problems. Nevertheless, they are popular in
practice and applied intuitively. One typical example is the singling out of various constructs from
the UML class diagram for the description of technical metamodels. For the normative descrip-
tion of technical systems, there is a great need to standardize descriptive languages which can
then be drawn upon. These descriptive languages should be concise and not overly expressive,
lend themselves to correct intuitive use, and follow the existing solutions both in their structure
and in their notation.