Joseph Wright <joseph.wright@...> writes:
> At present I'm waiting to see what people thing of the code-level stuff.
> At the same time, I'm not sure about making package option processing
> too complex. The lesson I've learned is that keyval in options is
> governed by the LaTeX2e kernel: options are expanded, and checking for
> clashes doesn't 'know' about keyval. Thus I tend to think load-time
> options should really be limited to things that need to happen there,
> with later \<thing>setup to cover more complex option sets.

Is the behavior of package & class options expected to be different 
(specifically, keyval-aware) in a LaTeX3 kernel?  If so, would it be 
appropriate to define \UseExplPackage et al. so that the future behavior can 
be experimented with?