NCP prompts for required components and parameters if they are not
 supplied when you issue the command.  Each prompt is either a list of
 admissible keywords for that position in the command syntax or the
 name of a parameter and a description of the value required.

 Prompting will not occur when NCP receives input from a command file.
 Parameter keywords must be supplied in command files.

 Each prompt consists of two parts:  the component or parameter desired,
 and its format.  The format of prompts is as follows:

         Component (Format):

 All underscores found in parameters must be replaced with spaces
 when parameters are used in NCP commands.

1  –  Format of prompts

 The component part indicates the name of either the component or
 parameter.  The format part indicates the range of acceptable values.
 The format part presents keywords in uppercase, value classes in
 lowercase as descriptive strings, and numeric ranges as two numbers
 separated by a hyphen.  Commas indicate alternatives which are mutually
 exclusive.

2  –  Exiting the Prompting Sequence

 You can exit a prompting sequence by responding with CTRL/Z for the
 prompt. This returns you to the NCP> prompt where you can then issue
 another NCP command. You can exit NCP directly from the prompting
 sequence by responding with CTRL/C or CTRL/Y.

 Responding to a parameter prompt or query with "_DONE" skips the
 remainder of the prompts or queries and performs the requested
 function with the parameters which have been entered up to that point.

3  –  Examples

 The following examples illustrate three types of prompting that NCP
 provides.

 Prompts to supply missing command component keywords:

         NCP>CLEAR <RIGHT>
         (LINE, CIRCUIT, LOGGING, KNOWN, NODE, OBJECT):

 No component is specified for the CLEAR command.  The prompt format is
 a list of admissible component keywords separated by commas.  Note
 that the plural keyword KNOWN is included in this list.

 Prompts to supply parameter values:

         NCP>CLEAR LINE <RIGHT>
         LINE ID (dev-c-u.t):

 NCP prompts for the line-id for this component since it is not provided
 with the command.

 The following example shows variations of the prompting scheme for
 parameter values:

         NCP>SET EXECUTOR <RIGHT>
         Node address           (1.1-63.1023): 2.11
         State    (ON, OFF, SHUT, RESTRICTED): ON
         ...
         Pipeline quota       (0-65535 bytes):6000

 Prompts to select parameter names:

         NCP>CLEAR LINE <RIGHT>
         Line ID       (dev-c-u.t): DMC-1
         All line parameters (Y,N):

 NCP prompts for the selected parameter names whose values are to be
 removed from the database.   In this case, no parameter name was given;
 consequently, NCP asks if all values  should  be  removed.   Y indicates
 that all values should be removed.  N causes NCP to provide a different
 response.  For example,

         NCP>CLEAR NODE BOSTON <RIGHT>
         All node parameters (Y,N): N
         Host node           (Y,N): Y
         Identification      (Y,N): N
         ...
         Service password    (Y,N): Y
         Tertiary loader     (Y,N): N

 Since N is the response to the first prompt above, NCP prompts for all
 of the parameter names.