string. The table can be
defined using definitions with the form <CODE>$|key|</CODE>
(the number of pipe symbols <CODE>|</CODE> is allowed to vary).</P><PRE CLASS="verbatim">    $|key 1| = value1
    $||key1|key2|| = value2    # The key is key1|key2
    X = $|key 1|               # Define X to be the value of field $|key 1|
</PRE><P>The usual modifiers are also allowed. The expression <CODE>$`|key|</CODE> represents
lazy evaluation of the key, and <CODE>$,|key|</CODE> is normal evaluation.</P><H3 CLASS="sub