Click the ClassificationSchemes folder (not the node symbol).
All the ClassificationScheme objects appear in the Registry Objects area. Follow the instructions in Viewing Search Results to view the objects.
Expand the ClassificationSchemes node to open the ClassificationSchemes tree hierarchy in the menu area.
Click any file icon to view that classification scheme in the Registry Objects area.
Expand a classification scheme node to see the Concept folders beneath it.
Not all classification schemes have concepts that are viewable in the Explore menu.
Click a Concept folder to view that concept in the Registry Objects area.