<!DOCTYPE html>
<meta charset="utf-8">
<title>href - textPath element reference</title>
<body>
  <svg width="100%" height="100%" viewBox="0 0 1000 300"
       xmlns:xlink="http://www.w3.org/1999/xlink">
    <defs>
      <path id="MyPath"
            d="M 100 200
               C 200 100 300   0 400 100
               C 500 200 600 300 700 200
               C 800 100 900 100 900 100" />
    </defs>
    <text font-family="Verdana" font-size="40">
      <textPath xlink:href="#MyPath">
        We go up, then we go down, then up again
      </textPath>
    </text>
  </svg>
</body>