Annotations are a way to capture information in the source code that extends the ABL language syntax. Validation is available to confirm that the information entered adheres to the predefined syntax and format.

At a minimum, the required annotation is simply a declaration that the ABL procedure is to be publicly available. The best practice is to add annotations to the ABL source code through the Progress Developer Studio for OpenEdge Annotation wizard. However, annotations can be added to the source code with whatever the developer uses to create the source code.