i> can be thought of as a mathematical equation,
where <tt>i</tt>, <tt>d</tt>, and <tt>s</tt> stand for the number of
insertions, deletions, and substitutions, respectively.  The equation
can have a multiplier for each of <tt>i</tt>, <tt>d</tt>, and
<tt>s</tt>.  The multiplier is the cost of the error, and the number
after <tt>&lt;</tt> is the maximum allowed cost of a match.  Spaces
and pluses can be inserted to make the equation readable.
</p>

<p>
Examples:
<dl>
<dt><tt>{~}</tt></dt>
<dd>Sets the maximum