<?xml version="1.0"?>
<!-- Clean up attributes
   * Normalize space around attributes on a tag
   * Sort the attributes by name
   * Strip xml:base attribute
  -->
<xml>
 <tag b="1"  c="123"  x=' abc' />
 <tag c="1"  d=" 123 "  x="abc" />
 <tag>
  <innertag   a2=" 2 "   b1="abc   "    a1="2">Hello</innertag>
 </tag>
</xml>