Re: Feature request: multilevel indexing for TeX

[arnold]

Hi.

> Maybe it will just have to be accepted that out-of-date versions of
> texindex shouldn't be used with multi-level index entries, otherwise
> the index will appear somewhat mangled.

I think we just have to say that.

> Implemented as @subentry in git commit 372cfab.
>
> A test file is attached. Please feel free to experiment.

Excellent! Will do.

A few questions.

1. texindex.awk has provision for both \ and @ to be the command character
(\entry vs. @entry). Do we still need that? Or will it always be backslash?

2. What do we wish to do about "see" and "see also"? I have a thought...

With respect to output from texindex.awk, I suggest that each macro
allow empty page number arguments.  Thus

        @cindex coffee makers @subentry electic
        @cindex coffee makers @subentry gerbel-driven

with no

        @cindex coffee makers

would yield

        \entry {coffee makers}{}
        \secondary {electric}{3, 12}
        \secondary {gerbel-driven}{9, 42}

and similar for \secondary if there are following \tertiary entries.

If that's the case, then texindex could also special case stuff like

        \entry {espresso makers, see coffee makers}{23}{espresso makers, see 
coffee makers}

as input and and turn it into

        \entry {espresso makers, see coffee makers}{}

on output. 

And similar for "see also".

Or we could go with keywords, to ensure that the user gets what they
wanted:

        @cindex espresso makers @see{coffee makers}
        @cindex coffee @seealso{instant coffee}

How much of this works for you?

Thanks!

Arnold