Unnamed

<?xml version="1.0" ?>
<images>
  <set category="characters" sift_octaves="1" sift_levels="1" sift_first="0">
    <image id="a">chars/a.pgm</image>
    <image id="b">chars/b.pgm</image>
    <image id="c">chars/c.pgm</image>
  </set>
  <set category="shapes" sift_octaves="1" sift_levels="1" sift_first="0">
    <image id="circle">shapes/circle.pgm</image>
    <image id="triangle">shapes/triangle.pgm</image>
    <image id="square">shapes/square.pgm</image>
  </set>
</images>