Object classes and attributes in LDAP can be organized into hierarchical relationships. A hierarchical relationship is one in which one entity stands in a parent or superior relationship to one or more subordinate entities.
Attribute hierarchies tend to be simple, and require only a short explanation. Object classes, on the other hand, use a more complicated hierarchical model and will be the focus of this part of the chapter.
In the cases of both attribute and object class hierarchies, the mechanism for creating the hierarchy is the schema definition. Schema definitions for both attributes and object classes use the
SUP field to indicate a relationship to a parent, or superior.
We will start out with a brief discussion ...