Clears or purges the node database on the local node before the copy
 operation is performed.  Retains the executor node characteristics
 and the name and address of the remote node from which the node infor-
 mation is to be copied.  The node database to be cleared or purged is
 the local database to which the information will be copied.  The two
 options are listed below (note that you can actually specified either
 CLEAR or PURGE for either database or both databases).

 	CLEAR		Clears the volatile database at the local node.

 	PURGE		Purges the permanent node database at the local
 			node.

 	If the WITH qualifier is not specified, the node entries copied
 	are added to the existing node database(s).