octave: The INDEX File

 
 37.4.2 The INDEX File
 ---------------------
 
 The optional ‘INDEX’ file provides a categorical view of the functions
 in the package.  This file has a very simple format
 
    • Lines beginning with ‘#’ are comments.
 
    • The first non-comment line should look like this
 
           toolbox >> Toolbox name
 
    • Lines beginning with an alphabetical character indicates a new
      category of functions.
 
    • Lines starting with a white space character indicate that the
      function names on the line belong to the last mentioned category.
 
 The format can be summarized with the following example:
 
      # A comment
      toolbox >> Toolbox name
      Category Name 1
       function1 function2 function3
       function4
      Category Name 2
       function2 function5
 
    If you wish to refer to a function that users might expect to find in
 your package but is not there, providing a work around or pointing out
 that the function is available elsewhere, you can use:
 
      fn = workaround description
 
 This workaround description will not appear when listing functions in
 the package with ‘pkg describe’ but they will be published in the HTML
 documentation online.  Workaround descriptions can use any HTML markup,
 but keep in mind that it will be enclosed in a bold-italic environment.
 For the special case of:
 
      fn = use <code>alternate expression</code>
 
 the bold-italic is automatically suppressed.  You will need to use
 ‘<code>’ even in references:
 
      fn = use <a href="someothersite.html"><code>fn</code></a>
 
 Sometimes functions are only partially compatible, in which case you can
 list the non-compatible cases separately.  To refer to another function
 in the package, use ‘<f>fn</f>’.  For example:
 
      eig (a, b) = use <f>qz</f>
 
 Since sites may have many missing functions, you can define a macro
 rather than typing the same link over and again.
 
      $id = expansion
 
 defines the macro id.  You can use ‘$id’ anywhere in the description and
 it will be expanded.  For example:
 
      $TSA = see <a href="link_to_spctools">SPC Tools</a>
      arcov = $TSA <code>armcv</code>
 
 id is any string of letters, numbers and ‘_’.