; KEYWORD
;---------------------------------------------------------------
;! gives name of keyword parameter - i.e. name of header field
;# ADVERB CATALOG
;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
KEYWORD   LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
KEYWORD
Type: Adverb    (character*8)
Use:  To specify a keyword parameter.  The lists of allowed keywords
      depends on the particular verb or task, but are roughly based on
      the standard FITS keywords.  See the HELP or EXPLAIN files of the
      verbs or tasks for these lists.
Null value:   none.
Verbs:
   EGETHEAD....Returns parameter value from image header and error code.
   GETHEAD.....Gets a parameter value from the header field described by
               the FITS keyword in adverb KEYWORD.
   GETTHEAD....Returns keyword values from a table header, also column
               #, # rows  On input, can be column label for 'FIND COL',
               on output is any string-valued KEYWORD value.
   PUTHEAD.....Puts a new value in the header field described by the
               FITS keyword in adverb KEYWORD.  There is no default for
               KEYSTRNG.
   PUTTHEAD....Inserts a given value into a table keyword/value pair.
Tasks:
   TABED.......Task to edit tables.  KEYWORD is the keyword name for
               keyword-based and conditional operations.
   TACOP.......Task to copy tables, other extension files.  To copy a
               table, if KEYWORD is not blank, the keyword value must
               be in the range or match the string specified.
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