s fine, provided that copyright.nw appears in the notangle
command.  Problems arise with noweave.  Copyright chunks appear as
"(never defined)" in a.tex and b.tex, what is obvious, because I cannot
use copyright.nw for weaving a.nw or b.nw (otherwise the copyright
notice chunk would appear several times in my printed document).
<p>
Does someone know how to solve this problem?

<p><blockquote><b>A.</b>  
This is a form of question that arises repeatedly, which is to say,
``what is the scope of chunk names?''