When you create a content class, you can create content properties for it at the same time. Alternatively, you can create a content class with no properties and add properties to it later.
On the Search page, click Create Content Class.
In the Name field, type a name for the content class.Content class names must be from one through 64 characters long, can contain any valid UTF-8 characters, including white space, and are not case sensitive.
(Optional) Define one or more content properties to be added to the content class.
(Optional) If you defined content properties, test or export them.
Click Create Content Class.