Associations - the relationships between categories, elements of a category, and nodes and devices.
Category - a variable that contains a set of values called elements. An example of a category is Location, which may have elements such as “America” and “Asia Pacific.” Another example of a category is “OS Type,” which may have elements such as “Windows” or “Unix” or “Linux.”
Elements - the values of a category. For example, the “America” element belongs to the “Location” category.
