  This datum is a single font. Use it to render text or test the size of text
  to draw.<p>
<dl class=datum>
  <dt>var/name</dt>
    <dd>The name of the font.</dd>
  <dt>var/height</dt>
    <dd>The height of a line. This is equal to <tt>ascent + descent</tt>.</dd>
  <dt>var/ascent</dt>
    <dd>Distance from the top of a line to the baseline of text. This
      includes some whitespace.</dd>
  <dt>var/descent</dt>
    <dd>Distance from the bottom of a line to the baseline of text. This
      includes some wh