 the regions containing the use.  If there is no binding of
the identifier whose region contains the use, then the use refers to the
binding for the variable in the top level environment, if any
(chapters&nbsp;<a href="r5rs-Z-H-7.html#%_chap_4">4</a> and <a href="r5rs-Z-H-9.html#%_chap_6">6</a>); if there is no
binding for the identifier,
it is said to be <a name="%_idx_38"></a><em>unbound</em>.<a name="%_idx_40"></a><a name="%_idx_42"></a></p>
<p>
</p>
<p>
</p>
<p>
</p>
<p>
</p>
<a name="%_sec_3.2"></a>
<h