Abstract
This paper is concerned with the engineering of modelling languages, and the engineering of modelling languages for enterprise architecture in particular. In line with this, this paper aims to provide two key contributions. Firstly, it aims to contribute to the field of (enterprise) modelling language engineering by refining an existing approach for the engineering of requirements on modelling languages. It will do so, by suggesting specific classes of purpose and quality criteria for models and their creation. The second contribution involves an initial application of the latter approach, in terms of a critical reflection on the language requirements as formulated for the ArchiMate standard.