| Column Name | Data Type | Description | 
| controlling_server_id | NUMBER | Foreign key to apt_v_server, for the media server. | 
| controlling_server_name | STRING | Name of the controlling server. | 
| description | STRING | Free-form text field | 
| device_name | STRING | Device name that controls the tape library | 
| instance_name | STRING | Name of the tape library instance. | 
| is_disk_library | CHAR | Indicates if this is a disk library | 
| is_online | CHAR | Y = Yes, N=No | 
| library_external_name | STRING | External library name | 
| library_id | NUMBER | Foreign key to apt_v_tape_library. For NetBackup, the foreign key to apt_v_nbu_tape_library.  | 
| library_name | STRING | Custom name assigned to the library | 
| library_type | STRING | Vendor-specific library type name. | 
| media_capacity | NUMBER | Total number of tapes that could be loaded within this tape library. | 
| nbr_of_drives | NUMBER | Number of tape drives within the tape library | 
| server_id | NUMBER | Foreign key to apt_v_server. | 
| server_name | STRING | Server’s internal name | 
| vendor_library_nbr | NUMBER | Unique number assigned to each library |