teIntegerAttribute(), DBFWriteDoubleAttribute(), and
  DBFWriteStringAttribute():
  <a href="#label-35">shape [field] = value</a></li>
<li>DBFWriteNULLAttribute():
  called if <code>nil</code> is given to <a href="#label-35">shape [field] = value</a>.</li>
<li>DBFGetNativeFieldType():
  not implemented in ruby-shapelib.
  Does anyone know how to interpret the return value properly?</li>
</ul>
<h2><a name="label-84" id="label-84">Appendix B: Flexible argument</a></h2><!-- RDLabel: "Appendix B: Flexible argum