Class tree view with starting class information content creator

Use the tree view to explore class hierarchy. The plus sign will expand the list if the hierarchy goes deeper. Selecting a class will show detailed information on the class.
author [EUPH-code: 917]
contributor [EUPH-code: 687]
data provider [EUPH-code: 7734]
recorded by [EUPH-code: 7471]
sponsor [EUPH-code: 933]
translator [EUPH-code: 747]