We currently have hard-coded indexes
title, alt_title, subtitle, ccli, scripture, and category
It would probably be nice for the general public to be
able to specify your own index tags.
Perhaps at the beginning of the source file, you could
have tags that created the index tags, or else change
the index tags to be something like:
{index:ccli:#####} and {index:scripture:Psalm 1}, etc.
You would have to be careful to not have a typo in your
index field, otherwise you would be creating a new
index, and you might not want to be doing that.
Probably title and subtitle are ok to leave as they
are, although we currently use the subtitle field for
author and copyright information, and theoretically,
those could be in their own fields.
