ne_number</em> (long) : line number in source file where 
expression was defined, to be used in error messages.</p></li>
<li><p><em>section</em> (string) : source file section name where expression 
was defined. </p></li>
<li><p><em>ASMPC</em> (word) : defines the relative module code address of the 
start of the assembly instruction to be used as <em>ASMPC</em> during
expression evaluation.</p></li>
<li><p><em>patchptr</em> (word) : defines the relative module code patch pointer to 
store the result of eva