- userApplications -- Is a user attributes and should be used for all attribute types that are intended for use in holding user-defined data.
- directoryOperation -- Is a Operational Attributes and should be used for attribute types that are used for behind-the-scenes processing within the server.
- distributedOperation -- Is a Operational Attributes and should be used for attribute types that store operational data that need to be distributed (i.e., replicated) throughout the directory environment.
- dSAOperation -- Is a Operational Attributes and should be used for attribute types that store operational data that should be stored only in one server and should not be replicated throughout the directory environment.
An AttributeType attribute usage defines the contexts in which it may be used. There are four types of attribute usage: