All resources are categorised or tagged with three fixed attributes: Media Type (type of resource); Site (geographic or virtual/digital location where shelved or stored); and Section (sub-location within a Site). Each resource also has a Status (On shelf, On loan, Lost, etc.) attribute that changes dynamically as the resource is processed through different scenarios. The name of each attribute may be edited. New categories can be created and existing categories may be merged or removed.

I want to know how to manage: