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<LI><A NAME="tex2html44"
  HREF="node3.html">2.1 Problem, Elemental and Internal Variables</A>
<LI><A NAME="tex2html45"
  HREF="node4.html">2.2 Element and Group Types</A>
<LI><A NAME="tex2html46"
  HREF="node5.html">2.3 An Example</A>
<LI><A NAME="tex2html47"
  HREF="node6.html">2.4 A Second Example</A>
<LI><A NAME="tex2html48"
  HREF="node7.html">2.5 A Final Example</A>
</UL>
<LI><A NAME="tex2html49"
  HREF="node8.html">3 The Standard Data Input Format</A>
<UL>
<LI><A NAME="tex2html50"
  HREF="node9.htm