Seitenhistorie

Specifies the person's affiliation within a particular security domain in broad categories such as student, faculty, staff, alum, etc. The values consist of a left and right component separated by an "@" sign. The left component is one of the values from the eduPersonAffiliation controlled vocabulary. This right-hand side syntax of eduPersonScopedAffiliation intentionally matches that used for the right-hand side values for eduPersonPrincipalName. [...]
http://macedir.org/specs/eduperson/#eduPersonScopedAffiliation