[XeTeX] Polyglossia "broken"?

[VAFA KHALIGHI]

I do not agree but I usually do not load any packages for various reasons.
If I need a particular function of a particular package, I implement it
myself, and even if that is not possible, I take macros from that package
but obviously change the macro names (both internal and public macros)
completely.

On Wed, Sep 21, 2011 at 11:01 PM, Heiko Oberdiek <
heiko.oberdiek at googlemail.com> wrote:

> On Wed, Sep 21, 2011 at 10:21:46PM +1000, VAFA KHALIGHI wrote:
>
> > > It is a bug in polyglossia that xkeyval has to be loaded manually
> > > before polyglossia, because polyglossia has
> > > forgotten \RequirePackage{xkeyval}.
> > >
> > >
> > >
> > Not really. fontspec used to load xkeyval and polyglossia loaded fontspec
> so
> > there was no need for polyglossia to load xkeyval again.
>
> No, packages *MUST* add packages for *all* required packages.
> The use of xkeyval for fontspec was an *implementation* detail
> that can change *any* time, like it has now happened.
> AFAIK, the use of xkeyval was never part of the official interface
> for fontspec. This would not make any sense, because fontspec deals
> with fonts and is not a package for providing key value parsers.
>
> Therefore it is a very clear bug of polyglossia, not to load
> xkeyval. A package can be loaded many times using \usepackage
> or \RequirePackage. LaTeX only loads the package at the first
> request. At the later requests it only checks the date and options
> of the request.
>
> It is also good style to add a date, if a package must not be too old:
>  \RequirePackage{foo}[2010/04/20]
> Then LaTeX will complain, if the loaded packages is too old.
>
> Yours sincerely
>  Heiko Oberdiek
>
>
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