Hi Piotr,
Tadziu wrote:
> > I quess that groff -R automatically activates refer.tmac and all
> > registers like [F become available. Correct?
>
> No, -R only filters the input document through the "refer"
> preprocessor before processing it with the actual formatter "troff".
See groff(1)'s -V option to better understand what's happening. In a
way, groff just obscures the workings for convenience, and I'm not sure
that's a good idea. It may be better to avoid it and use the underlying
commands whilst you're learning.
$ groff -V /dev/null
troff -Tps /dev/null | grops
$ groff -V -R /dev/null
refer /dev/null | troff -Tps | grops
> For example, troff.org lists M. E. Lesk's "Some Applications of
> Inverted Indexes on the UNIX System" as providing a basic overview of
> how refer works.
https://troff.org/papers.html#refer
--
Cheers, Ralph.
