# SubUniverseClass description A SubUniverseClass groups Universes using a defining characteristic. For example, a SubUniverseClass defined by number of employees for the parent Universe "Manufacturing businesses" may contain the Universes "Businesses with fewer than 50 employees" and "Businesses with at least 50 employees". Each member is interpreted within the parent Universe, independently of geographic area or time period. In addition to the standard name, label, and description, the SubUniverseClass references a concept which defines it, and references to the universes and or other sub-universe groups it contains. The contents of the SubUniverseClass may be designated as ordered.