<?xml version="1.0" encoding="utf-8"?>
<is:stuff xmlns:is="http://asynchronous.org/rx/ns/2005/01/is#"
          xmlns:ex="http://example.org/stuff/1.0/">
  <!-- This file should raise an error on a RX parse attempt. -->
  <is:aDescription>
    <ex:editor>
        This is <ex:homePage /> mixed content.
    </ex:editor>
  </is:aDescription>
</is:stuff>