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From: Joseph Wright <joseph.wright@MORNINGSTAR2.CO.UK>
Subject: Re: keyval options for \usepackage
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On 15/08/2010 21:43, Arno Trautmann wrote:
> Hi all,
>
> is there a possibility to use package options, i.e.
>
> \usepackage[figure]{mypackage}
>
> via expl3? I didn’t find anything in l3keys – do I have to use xkeyval
> for package option processing?
>
> cheers
> Arno
>

Hello Arno,

This is what l3keys2e is for: l3keys does the 'LaTeX3' side, l3keys2e 
does the 'LaTeX2e interface' part. You want

   \RequirePackage{l3keys2e}
   \ProcessKeysOptions{<module>}

or

   \RequirePackage{l3keys2e}
   \ProcessKeysPackageOptions{<module>}

depending on whether global options should be parsed.
-- 
Joseph Wright