ault value for its flags, for example if the flag holds a
filename that might not exist in some environments. To mitigate such problems,
you can use <a href="#validate">flag validators</a> to ensure prompt
notification (in the form of a crash) of an invalid flag value.
</p>

<p>Note that while most functions in this library are defined in the
<code>google</code> namespace, <code>DEFINE_foo</code> (and
<code>DECLARE_foo</code>, <A HREF="#declare">below</A>), should always
be in the global namespace.</p>


<h