1)</a></h3>
<p>The function <code>+</code> and the concept 
<code>number</code> are predefined in PowerLoom.
</p><h3><a name="FOOT2" href="manual_2.html#DOCF2">(2)</a></h3>
<p>Many of
the Powerloom API procedures take a module argument that causes a temporary
switch to a different module within the scope of that procedure.
</p><h3><a name="FOOT3" href="manual_3.html#DOCF3">(3)</a></h3>
<p> PowerLoom modules are case-insensitive by
default.  This means, for example, that a logical constant named &quot;Foo&qu