|The editors provided for Visual OCL were implemented in a project from Students of the Technical University. You can decide between the implementations of three groups. The editors are restricted in functionality, but allow the main constructs of Visual OCL. The two first projects were developed mainly in 2004, wheras the third group worked on their project in 2005. The editor of the first group has a slightly different graphical representation of Visual OCL models mainly for reasons of readability of the edited diagrams. Good conformity with the formal language definition is characteristic for the editor of the second group, but with less language features. Using graph transformation for the conversion to an OCL string states the new aspect of the 2005 project.