| enter a description of the classification definition  | 
click the General tab, and enter the description.  | 
| specify the object types to which the definition applies  | 
see To Specify the Object Types for a Classification Definition.  | 
| enter classifications  | 
see To Add Classifications to a Classification Definition.  | 
| attach property sets to the individual classifications in the definition  | 
see To Attach Property Set Definitions to a Classification Definition.  | 
| add notes or files to the definition  | 
see To Attach Notes and Files to a Classification.  |