Special Attributes
One or more Attribute Types form the RDN
- The Naming Attributes or
- The Distinguished Attributes
An Entry must have one or more Objectclass Attributes
- It characterizes the Entry, e.g. Person
- It defines a set of usable Attributes
Objectclasses can inherit Attributes from other Objectclasses
A set of Objectclasses, Attributes and Syntaxes for a special purpose are called schema