This specifies the Access Point of the DSA which holds the master
 copy of a directory entry subordinate to the current entry. There
 is no default value.

 Syntax:

 ADD    DSA SUBORDINATE REFERENCE <name> ACCESS POINT {<value>,...}
 REMOVE DSA SUBORDINATE REFERENCE <name> ACCESS POINT {<value>,...}
 SET    DSA SUBORDINATE REFERENCE <name> ACCESS POINT {<value>,...}
 SHOW   DSA SUBORDINATE REFERENCE <name> ACCESS POINT

 where <value> is the access point of the DSA and is
 specified as follows:

    {[ae title = "<distinguished name of DSA>",
      presentation address = '<presentation address>']}

 The AE Title and Presentation Address attributes are both mandatory.
 Note that you must specify the AE Title and Presentation
 Address in the order shown above.

 Specify all valid NSAPs for a DSA in an access point. This
 improves the network efficiency of the DSA, ensuring that if
 a connection to the relevant DSA already exists, it is always
 re-used.

 Refer to DSA Common_Datatypes for more information
 on how to specify an AE Title and a Presentation Address.