The Categories module enables users to sort their documents based on categories. It is thus a different approach to sorting documents from the one described in the Tags chapter.
There are three types of categories from the point of view of the user:
•Global categories - such categories can be used across all available sites. However, you need to allow global categories for the sites first.
•Site-specific categories - such categories can be used only on the given site.
•Personal categories - global categories belonging to a particular user. The user can use these categories across all available sites.
To learn how to create and edit categories, please refer to the Managing categories topic.
To learn how to put your documents under categories, please refer to the Assigning categories to documents topic.
The security matters related to the Categories module are described in the Security topic.