On Thu, Jan 21, 2016 at 3:09 PM, Eli Zaretskii <eliz@gnu.org> wrote:

> > From: Stephen Leake <stephen_leake@stephe-leake.org>
> > Cc: Dmitry Gutov <dgutov@yandex.ru>,  emacs-devel@gnu.org
> > Date: Thu, 21 Jan 2016 13:19:45 -0600
> >
> > > Cross-Referencing doesn't fit, IMO, not if you consider the user-level
> > > functionality.
> >
> > "Cross-reference" was certainly the initial intent of the xref package.
> >
> > If that name no longer fits, it means there is functionality in
> > xref that doesn't belong there.
>
> I don't think the decisions on what does and doesn't belong should be
> based on names.  FWIW, I don't see in xref.el anything that doesn't
> belong there.
>

My sense is that xref (and tags before it) suggests existence of an
index and that xref- operations are then driven by that index.  Not
by taking entries out of that index and extracting file paths.  That is
the role of project.  Project supplies only a set of files.  After that
regex-based algorithms seem entirely expected.