A DSA entity enables you to manage a DSA for a given node.
 A DSA entity must be created and enabled before it can receive
 connections from directory applications or other DSAs.
 There is only one DSA entity per node. A DSA entity has four subentities,
 illustrated below:
                               DSA entity
                                    |
             +--------------+-------+------+--------------+
             |              |              |              |
          Naming       Subordinate     Superior        Accessor
          Context      Reference       Reference       entity
          entity       entity          entity
Additional Information:
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