The Keys tab is specific to profiles.
A key is an attribute of an ispec or event that acts as the unique identifier of one record from another. It is the access path to individual ispec or profile records.
To define an attribute as a key, perform the following:
Right-click on the tab and select Add Key.
The Select new key dialog box contains the attributes of the element to which the profile belongs.
Select an attribute and click OK.
The attribute is added to the key list as the last in the sequence.
You might delete, replace or validate any key in the list, by right-clicking the key and selecting the appropriate action from the menu.