**5. Sketches**

Any institution gives us a corresponding category of presentations and an extension of the model functor of the institution to the category of presentations at hand [2,31]. We outline this construction for Institutions of Statements and Institutions of Equations.

We would like to use a specific term to distinguish presentations for Institutions of Statements or Equations, resp., from presentations in general. Since many of our motivating examples are variants of sketches, we will simply use the term *sketch*. In Sections 5.1 and 5.2, we concentrate on sketches for Institutions of Statements while Section 5.3 outlines the corresponding variations for Institutions of Equations.
