****Format Control Options****

ALPHA		Takes the first character in selection text for prompt.
BLANK		Has no selection prompt.
CHAR_UNFORMAT	Like REPEAT, but no formatting.
char_unformat	Like above, but all cursor postion must explicit.
DOUBLE_CHAR	Takes the first two character in selection text for prompt.
NUMBER		Generates a numeric selection for prompt.
REPEAT		Repeats the first character as selection prompt.
TWO_CHAR_UNF	Like DOUBLE, but no formatting.
two_char_unf	Like above, but all cursor postion must explicit.
UNFOR_NUMERIC	Like NUMBER, but no formatting.
unfor_numeric	Like above, but all cursor postion must explicit.
2formatted_opt	Double column of option.

	****Script Command Summary****

AGAIN/NAGAIN		Ask to repeat selection, do it if yes (N timeout=yes). 
ALLOW			Permit action items to execute on a return in initial.
AND n			'AND' privelge mask and n.
APPEND	filespec	Open 'filespec' for appending (create if nonexistent).
ASK (insert) text	Ask 'text' and if "yes", then use 'insert'.
ASKL text		Ask 'text' and on "yes", set; "no", clear logic flag.
ASKS (insert) text	Ask 'text' and use 'insert' as a default.
ASKS text		Ask 'text' and use reply for substitution; must answer.
ASK? text		Help for "ask" commands, must immediately follow the
			"ask" command.  Use 'text' as input to system-wide help.
ASK? (filespec)		Like above, except, types 'filespec'.
ASK? "text"		Like above, except, outputs 'text'.
ASSIGN dev/filespec	Set filespec as sys$output for next action.
BATCH			Sets the no-wait flag for action item execution.
BOTTOM			Sets flag to force cursor to bottom of screen if no
			clear flag is set for output (use with split screen).
BLOCK			Outputs 'Type <cr>' to continue message and waits.
CALL/SUB filespec	Calls menu script 'filespec'.
CHAIN command		Forces script to exit and chain to 'command'.
CHOICE			Causes execute string to be outputted at top of screen
			with scrolling regions set to perserve it.
CLEAR			Sets flag to clear screen on next terminal output.
CLI cliname		An RSX command to switch CLI; a NOP in VMS
CLOCK			Outputs current time and date as text to the terminal.
CLOSE			Closes log file.
CONTINUE		Sets the continue flag for action item execution.
DATE			Places the time and date on the menu, updates 1/min.
DEBUG			Sets the debug flag.
DELAY seconds		Causes the script to wait 'seconds'.
DISALLOW		Stops action items in init field on "Return's".
DLOGICAL logical	A control item that deletes 'logical'.
DSYMBOL symbol		A control item that deletes 'symbol'.
END			Stops the execution of a selection.
ERASE_SCREEN		Clears a split screen, the whole screen if not split.
ERROR			Sets hold on error flag for action item execution.
EVENT_FLAG (opt) data	Controls event flag (attach,detach,set,clear,wait)
EXIT			Exits the script program.
FILENAME		Causes present script filename in the symbol "SCR$FILE".
FREE			Enables control_Y/control_C.
GOTO filespec		Exits present menu and goes to 'filespec' script.
GRAPHIC	command		Causes 'command' to be executed at each menu output.
HARDCOPY_PROMPT	"prmpt"	Use 'prompt' in place of 'SCR>' on hardcopy returns.
HOLD			Sets the hold flag for action item execution.
IF item			Tests 'item' and executes the next command if true;
			items are: logical, privilege, CRT, and action (error).
IFNOT item		Tests 'item' and executes the next command if false.
INQUIRY			Asks user if the wish to continue selection.
ISOLATE			Causes action items to be spawned without tables.
KILL_LAST		Cancels the Last command.
LAST command		Causes 'command' to be executed when program exits.
LIST_BEGIN @file/symbol Begins a list processing block.
LIST_END		Ends a list processing block.
LOCK			Sets lock flag, which disables user initiated.
			exits (PF4, ^Z, etc.) and commands ($,@ commands).
LOG string		Writes the time/date, then 'string' to the output file.
LOGICAL (name) string	Sets logical 'name' to string.
LOOP			Causes selection to restart from the beginning.
MAILBOX (opt) string	Controls mailbox open/close, read/write, etc..
MAINTAIN_FLAGS		Causes flags to be maintained between scripts.
NO CLEAR		Causes clear flag to be reset.
OFF			Sets the log-off flag.
OPEN filespec		Opens 'filespec' for logging (see Write command).
ON			Resets the log-off flag.
OR mask			Causes mask to be or'ed with the privilege mask.
OVERRIDE_FLAGS		Cancel Maintain Flags command.
OUTPUT filesname	Types 'filename', pausing every 22 lines.
PASSWORD name/"passwd"  Request password from user, if incorrect, the selection
			or the menu is cancelled.
PRINTER option		Controls escape sequences for enabling and disabling 
			the printer port on terminal.
PRIVILEGE		Checks OPER/ SYS privilege and cancels selection if not.
PROCEED_ON_ERR		Causes the Stop_On_Err flag to be reset.
PROMPT			Causes no cursor control; selections are prompted.
PROTECT			Checks OPER or SYS privilege and cancels meun if failed.
QUERY			Sets the query flag for action item execution.
RECALULATE		Re-compile the present menu.
RESET_SCREEN		Clears screen, resets scrolling, and homes the cursor.
RETURN			'Returns' form a called menu.
SAVE_CONTEXT		Saves the menu stack and present menu name in a symbol.
SET n/log/not_log	Sets privilege mask to n, or sets/resets logical flag.
SHOW_FILENAME		Outputs present script name.
SILENT			Sets the silent operation flag.
SLAVE			Disables control_Y/control_C.
SPLIT			Enables split screen scrolling regions.
STOP_ON_ERR		Sets the Stop_On_Error Flag.
STRING (text)		Cause 'text' to be used as a substitution string.
SYMBOL (symbol) string 	Writes global symbol 'symbol' with 'string'.
TEXT text/"text"	Outputs 'text'.
TIMEOUT n		Sets reply timeout to 'n' seconds.
TITLE text		Clears screen, outputs 'text' and sets scrolling.
TOP			Clears screen and sets scrolling.
UNFORMATTED_SCREEN	Keeps screen from being cleared btween selections.
UNLOCK			Clears lock flag.
VERBOSE			Clears the silent operation flag.
WAIT			Sets the wait flag for action item execution.
WHOLE			Disables split screen scrolling regions.
WIDTH n			Set the terminal width to n.
WRITE string		Writes'string' to the output file.
XSTATUS n		Exits with status 'n'.
ZERO			Returns to initial script with nesting level at 1.
?/HELP text		If help requested, call to system help for 'text'.
?/HELP (filespec)	If help requested, type 'filespec'.
?/HELP "text"		If help requested, output 'text'

	****Item Masking Rules and Syntax****

1.  The syntax for mask option line is:  "~comment_text offset_number"
2.  The mask option line must proceed the prompt text of a selection.
3.  The selection must follow the normal rules of syntax.
4.  The mask option uses the value contained in symbol SCR$MASK as user's mask.
5.  The number in mask option is a bit offset between 1 and 32.  (0 = OPER/SYS)

	****Screen Control Codes****

!nn,nn		!Bold		!Flash		!Underline	!Reverse
!Normal		!Wide		!Tall/!tall	!High/!high	!Ascii
!Graphic	!Special	!Zero		!Line		!Clear_line
!Delete_rest	!Erase_scrren	!<		!>		!up
!down		!backspace	!cr		!linefeed	!escape
!save_cursor	!restore_cursor	!Mann (multi a) !mnn,nn		!O/!origin_mode
!X/!xbackgrnd

	****Command Line Syntax****
SCRIPT/switch/switch "substitution string" "sub strg" script_filespec
/SCREEN_ONLY	Does screen format only, exits on first selection after setting
		symbols SCR$COMMAND AND SCR$HELP.
/HARDCOPY	Overrides system information, treat terminal as hardcopy device.
/DEBUG		Set the debug flag.
/CONTEXT	Get file, flags and nesting info from SCR$CONTEXT and SCR$FILE.
/LOCK		Sets lock and slave flags.
/BUILD		Causes script to be "compiled" and written back to a new file.
/NO_EXECUTE	Prevents execution of "$" action items.
/MAILBOX	Starts sub-process SCRIPT.MAIL_BOX and connects to it.
/BACKGROUND	Connects to mailbox 'MAILBOX'.  (See SCRIPT.BACKGROUND)

	****User Inputs****
At Cursor:
Return <cr>	  Selects option.
Question Mark <?> Requests help for option.
Arrow Keys	  Moves cursor up or down.
<sp>,<tab>,<0>    Moves cursor down.
Backspace <bs>    Moves cursor up.
At the Cursor or the Prompt:
<string><cr>	  Request selection <string>.
<cr>		  Request the top selection.
<string?><cr>	  Request help for selection <string>.
HELP/help<cr>	  Request help on Script input.
$<string><cr>	  Execute <string> as a command.*
!<string><cr>	  Exit with <string> in symbol SCR$COMMAND.*
@<string><cr>	  Change menu script to <string>.*
PF1		  Repaint screen.
PF2		  Same as <?>, requests help for selection.
PF3		  Request return to first menu script.*
PF4		  Exit Script process.*
<^C>,<^Y>,<^Z>	  Exit Script process.*
<lf>		  Executes a RETURN function.*
<^W>		  Repaint screen.
<^T>		  Display filename of current menu script.
* Subject to the "Lock" flag, if not allowed, treated as a <^W>.

	****Symbols and Logicals****

Logicals are used by Script:
SYS$SCRIPT:	Replaces "$" on script filespecs.
SCR$PASSWORD:	Logical filespec for location of password data file.
Symbols used as inputs by Script:
SCR$MASK	Mask to be used in Item Masking (see above).
PRV$RESULT	Privilege mask used by PRIVILEGE command.
SCR$FILE	Output of FILENAME command, current script filespec.
SCR$CONTEXT1/4	Output of SAVE_CONTEXT command, flags and script nesting info.
Symbols are outputted by Script:
SCR$RETURN	The number of the selection chosen in DCL mode.
SCR$HELP	"YES"/"NO" flag in help was chosen in DCL mode.
SCR$COMMAND	Holds special escape "!" command line.
SCR$FILE	Output of FILENAME command, current script filespec.
SCR$CONTEXT1/4	Output of SAVE_CONTEXT command, flags and script nesting info.

	****List Processing Rules and Syntax****

"%LIST_BEGIN @filename or symbol_name".  This command starts the block of script
commands that are to be repeated.  If a file, each record is one element of the
list.  If a  symbol each element seperated by a comma ','.
"%LIST_END".  This command ends the block of script commands.
The substitution token is "\\*".  Each time the block of script commands are 
repeated, the next element in the list is used until the list is completed.
Example:  Symbol 'VALID_QUE' contains "TAPEQ,PRINTER,BATCH1"
		% LIST_START VALID_QUE
		Show Queue \\*
		$ sho que \\*
		% LIST_END
The option would be repeated 3 times with \\*s' replaced by "TAPEQ", "PRINTER",
and "BATCH1" on each successive repetiton.

	****Substitutions****

Substitions made when the Script is read and 'compiled':
^symbol/logical^  Any word surrounded by '^' will be translated and substituted.
\\0		  First 4 characters of terminal name will be substituted.
\\1-6		  Command line substitutes, in order on command line.
\\*		  List processing substitution token.
Substitutions made during Script execution:
##1-4		  'ASK' reply strings, in order of inquiry.
##0		  Time and date (dd-mmm-yyyy hh:mm).
##T/t		  Time, (T = hh:mm; t = hhmm).
##D/d		  Date, (D = dd-mmm-yyyy; d = dd_mmm_yyyy)
##M		  Mailbox record