This specifies the Access Point of the DSA which holds
 a naming context which is superior to all of the naming
 contexts held within this DSA. There is no default value.
 The attribute is single-valued.

 Syntax:

 ADD    DSA SUPERIOR REFERENCE ACCESS POINT {<value>}
 REMOVE DSA SUPERIOR REFERENCE ACCESS POINT {<value>}
 SET    DSA SUPERIOR REFERENCE ACCESS POINT {<value>}
 SHOW   DSA SUPERIOR REFERENCE ACCESS POINT

 where <value> is the access point of a DSA that holds a master
 copy of a naming context that is higher than all naming contexts
 on this 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 the DSA in the 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.