Synonym mapping allows a node name to be determined from a Phase IV
 synonym assigned to that node.

 For directory services that support hierarchical naming, this is done
 by setting up directories and links within those directories, based on
 the synonyms assigned to the nodes in the network.  Each link then
 points to the node name associated with the indicated synonym.

1  –  DECdns

 Soft link names are used to map synonyms to their respective node
 names.

 The normal default value for the synonym mapping directory in the
 DECdns directory service is:

   .DNA_NodeSynonym

 The default directory name can be changed using the preferences form.

 This directory contains the actual soft link names.  The name
 structure is:

   .DNA_NodeSynonym.<synonym>

 Where:

   <synonym>   is the Phase IV synonym name.

 For example, for the synonym "MYSYN", the fully specified soft link
 name is:

   .DNA_NodeSynonym.MYSYN

2  –  Local

 The Local Naming Database does not make use of synonym mapping for
 mapping Phase IV synonyms to names.  Instead, the Phase IV synonyms
 are treated as keys within the indexed Local Database file.

3  –  Phase IV

 The Phase IV Database does not make use of synonym mapping for
 mapping Phase IV synonyms to names.  This is because Phase IV
 synonym names are the only names allowed in the Phase IV Database.