ptx man page on NeXTSTEP

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PTX(1)									PTX(1)

NAME
       ptx - permuted index

SYNOPSIS
       ptx [ option ] ...  [ input [ output ] ]

DESCRIPTION
       Ptx  generates  a permuted index to file input on file output (standard
       input and output default).  It has three phases:	 the  first  does  the
       permutation,  generating	 one  line  for each keyword in an input line.
       The keyword is rotated to the front.  The permuted file is then sorted.
       Finally,	 the  sorted  lines  are  rotated  so the keyword comes at the
       middle of the page.  Ptx produces output in the form:

	      .xx "tail" "before keyword" "keyword and after" "head"

       where  .xx  may	be  an	nroff  or  troff(1)  macro  for	  user-defined
       formatting.    The   before   keyword  and  keyword  and	 after	fields
       incorporate as much of the line as will fit around the keyword when  it
       is  printed  at the middle of the page.	Tail and head, at least one of
       which is an empty string "", are wrapped-around pieces small enough  to
       fit in the unused space at the opposite end of the line.	 When original
       text must be discarded, `/' marks the spot.

       The following options can be applied:

       -f     Fold upper and lower case letters for sorting.

       -t     Prepare the output for the  phototypesetter;  the	 default  line
	      length is 100 characters.

       -w n   Use  the next argument, n, as the width of the output line.  The
	      default line length is 72 characters.

       -g n   Use the next argument, n, as the number of characters  to	 allow
	      for  each	 gap  among  the  four	parts  of  the line as finally
	      printed.	The default gap is 3 characters.

       -o only
	      Use as keywords only the words given in the only file.

       -i ignore
	      Do not use as keywords any words given in the ignore  file.   If
	      the  -i  and  -o	options	 are missing, use /usr/lib/eign as the
	      ignore file.

       -b break
	      Use the characters in the break file to separate words.  In  any
	      case,  tab,  newline,  and  space	 characters are always used as
	      break characters.

       -r     Take any leading nonblank characters of each input line to be  a
	      reference identifier (as to a page or chapter) separate from the
	      text of the line.	 Attach that identifier as a 5th field on each
	      output line.

       The index for this manual was generated using ptx.

FILES
       /usr/bin/sort
       /usr/lib/eign

BUGS
       Line  length  counts  do	 not  account for overstriking or proportional
       spacing.

7th Edition			April 29, 1985				PTX(1)
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