<?xml version="1.0"?>
<ABC xmlns="http://parent.name.space" xmlns:svg="http://www.w3.org/Graphics/SVG/1.0">
<!-- document in the parent namespace -->
  <svg:svg width="40%" height="40%">
    <svg:rectangle width="43.6" height="31.5"/>
<!-- svg graphic continues -->
  </svg:svg>
<!-- document in parent namespace continues -->
</ABC>