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On 09/03/2011 17:07, William Adams wrote:
>> I thought about this issue, but how should this be done on the technical level? Once you have defined a TeX macro, there is no way to "deactivate" it. I had the hope that it would be possible to require either \NeedsTeXFormat{LaTeX2x} or \usepackage{expl3...}, but I don't think there is a simple way to do this.
> 
> Okay, how about one defines all the macros using in-accessible names, then the \usepackage call \lets them to the proper, accessible names? This should still give the desired time-savings while requiring that \usepackage be called.

At least in the case of expl3 + xparse + xtemplate, the macros only get
used if you actively want to anyway. (Galley-related stuff is
different.) So I'm unclear on what one wants to 'activate', quite apart
from the technical questions.
-- 
Joseph Wrig