Requirements

The following requirements are should be fulfilled by the graphical editing frameworks.

Elements:

• Classes with name, attributes and methods
• Groups with name, groups can be nested
• Relations / Associations with 3 labels in different styles
• Relations should support layered styles
• Configuration editor (with validity verification)

Functional:

• step into groups (in the same editor and maybe open in new editor)
• adaptable edit policies to disable some features (e.g. creating a relation between two classes)
• relations between relations
• toolkit palette view (changeable)
• configuration context menu (rightclick, context buttons, etc.)

Non-Functional:

• Framework provides a stable API (avoid breaking changes)
• Framework will be supported for around 5 years
• Framework is open-source and licensed to use for research and teaching