Library /sys$common/syshlp/DECNET_REGISTER_FORMS.HLB  —  MAIN_MENU, NSAP Addresses
 NSAP addresses are used when registering or modifying node information.
 They can also be used when specifying nodes to show, export, or
 deregister.

 The format for an NSAP address is either:

     DNA format -  <afi>:<idi>:<predsp>-<locarea>:<nodeid>:<nsel>
     OSI format -  <afi><idi>+<predsp><locarea><nodeid><nsel>

 Where:

     <afi>     - The AFI (Authority and Format Identifier)
     <idi>     - The IDI (Initial Domain Identifier)
     <predsp>  - The prefix portion of the DSP (Domain Specific Part)
     <locarea> - The local area portion of the DSP
     <nodeid>  - The node id portion of the DSP
     <nsel>    - The N-Sel (Network Selector) portion of the DSP

 Each address field contains:

     AFI         2 decimal digits
     IDI         some number of decimal digits, determined by the AFI
     PreDSP      some number of hex digits, determined by the AFI
     Local area  4 hexadecimal digits
     Node id     12 hexadecimal digits
     N-Sel       2 hexadecimal digits

 When using DNA format NSAPs, the preDSP, local area, and node id can
 contain embedded hyphens ("-") to improve readability.  Also, leading
 zeros in the local area and node id fields can be dropped.  For
 example, the following two addresses are equivalent.

     39:840:0001:AA-00-04-00-05-04:20
     39:840:1:AA0004000504:21

 When using OSI format NSAPs, embedded hyphens are not allowed, and
 leading zeros cannot be dropped in any field.  For example:

     39840+0001AA000400050421

 An N-Sel of "20" specifies the use of the DECnet Phase IV NSP
 transport.  Any other N-Sel value (such as "21") indicates the
 use of the OSI Transport Class 4 protocol (TP4).

 If used when indicating nodes to show, export, or deregister, wildcards
 (indicated by asterisks) can be used to indicate multiple nodes.  Either
 the node id or the local area plus node id can be wildcarded.  When using
 a wildcard, do not specify the N-Sel, For example:

     39:840:56A1-0001:* (all nodes in area 39:840:8056A1-0001)
     39:840:56A1*       (all nodes in all local areas under 39:840:56A1)
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