u should be familiar with the parsing of context-free grammars. A good book to look at is <EM>
Compilers: Principles, Techniques, and Tools</EM>
 by Aho, Sethi, and Ullman (a.k.a. &quot;The Red Dragon Book&quot;).</P>
<P CLASS="sectionlinks">
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&nbsp;&nbsp;<A HREF="#Parse_1.htm">1 Parse Library Behavior</A><BR>
&nbsp;&nbsp;&nbsp;&nbsp;<A HREF="#Parse_2.htm">1.1 The Scanner</A><BR>
&nbsp;&nbsp;&nbsp;&nbsp;<A HREF="#Parse_3.htm">1.2 The Parser</A><BR>
&nbsp;&nbsp;&nbsp;&nbsp;<A HREF="#Parse_4.htm">1.3 