This help section describes how to use the Network Control
    Language (NCL) command line interface on HP DECnet-Plus for
    Tru64 UNIX and OpenVMS nodes. You should be familiar with the
    concepts and terminology of the entity model of network
    management, as described in the DECnet-Plus Network Management
    manual.  This hierarchy of manageable entities is also
    described in this help utility under HELP ENTITY_HIERARCHY.