units are listed in <EM>
italics</EM>
. The string must parse to a well-formed <EM>
expression</EM>
.</P>
<DL>
<DT>
<EM>
expression</EM>
:</DT><DD>'(' <EM>
expression </EM>
')<EM>
'<BR>
</EM>
NEG_OP <EM>
expression<BR>
</EM>
IDENTIFIER '(' <EM>
function_args</EM>
 ')'<BR>
<EM>
base_item more_expression</EM>
</DD>
<DT>
<EM>
more_expression</EM>
:</DT><DD>
&lt;empty&gt;<BR>
PERCENT_OP <EM>
more_expression<BR>
</EM>
BINARY_OP <EM>
expression</EM>
</DD>
<DT>
<EM>
function_args</EM>
:</DT><DD>
&lt;empty&gt;<BR>
