Education Evidence Diploma "overall grade" not always exists

[XHochschuleDE]

The cardinality of overall grade in the diploma evidence currently is 1..1 but should be 0..* to reflect two different issues:

a) (0..) studies (that do have particular grades of courses and also a status but) that do not indicate an overall grade. (perhaps status should be the mandatory thing but not be modelled inside the complex type grade ?)
b)( ..*) studies with
b1: multiple disciplines (Kombinations- bzw. Mehr-Fachstudiengänge) have multiple overall grades (Fachgesamtnoten) and
b2: joint degrees issued from Higher Education Institutions such as the French-German University reflected in the ISFATES, so joint degrees issued by organisations laying in different EU Member States should indicate on the joint-diploma the non-joint :) overall grades separately by Member State.

This issue was handed in by XHochschule but was found by the University of Mannheim and Universität des Saarlandes und der Hochschule für Technik und Wirtschaft des Saarlandes in the 2nd German call for comments

[cbahim]

Thanks for your comments @XHochschuleDE. You can propose (a) during the next webinar. In the meantime, we can make overalGrade optional and unbounded.