<?xml version="1.0" encoding="UTF-8"?>
<svg xmlns="http://www.w3.org/2000/svg"
     xmlns:h="http://www.w3.org/1999/xhtml" width="100" height="100">
  <metadata>
    <h:link rel="help" href="https://w3c.github.io/svgwg/svg2-draft/paths.html#TheDProperty"/>
    <h:link rel="match" href="priority-ref.svg"/>
    <h:meta name="assert" content="Property overrides attribute."/>
  </metadata>
  <style>
    path {
      stroke-width: 3;
      stroke: blue;
    }
    #top {
      d: path('M 20 10 h 70');
    }
  </style>
  <path id="top" d="M 10 20 h 70" />
  <path d="M 10 90 h 70" style="d: path('M 20 80 h 70')" />
</svg>