A .toc file is built by root cd-ing into the directory and running
a "inutoc ." command.

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  The format of a .toc file is a bunch of stanzas of files on disk
described within curly brackets, {}, and within those curly brackets,
filesets are described and bracketed with square bracktes, [].

  A simple (one disk file with one fileset in it) example is

bos.dosutil 4 R I bos.dosutil {
bos.dosutil 04.01.0003.0000 1 N U En_US DOS Utilities
[
%
/usr/bin 144
/usr/lib/objrepos 8
INSTWORK 56 16
%
bosext2.dosutil.obj 4.1.0.0
%
%
]
}

  In this example,
- The name of the file on disk is bos.dosutil, which will be in the
  same directory the .toc file is in (first token on line ending
  with a left curly brace, "{").
- The package this fileset belongs to, is also called bos.dosutil,
  (fifth token on line ending with a left curly brace, "{").
- The name of the fileset within this file is also bos.dosutil
  (first token of line before the line containing the lone left
  square bracket, "[").
- The descriptive name of that fileset is "DOS Utilities"
  (seventh token of line before the line containing the lone left
  square bracket, "[").

In a NIM installp_bundle, are listed fileset names, that is,
the first token of the lines before the [-line.