<?xml version=“1.0”?> <!DOCTYPE doc [ <!ATTLIST normId attr NMTOKENS #IMPLIED> ]> <doc>

<!-- no normalization -->
<norm attr="   "/>
<norm attr="   foo bar   "/>
<norm attr="  foobar"/>
<norm attr=" foo bar "/>
<norm attr="foobar  "/>
<norm attr=" &amp; "/>
<norm attr="   foo&amp;bar   "/>
<norm attr="  foobar&amp;"/>
<norm attr="&amp;foo bar "/>
<norm attr="foobar  &amp;"/>
<norm attr=" &lt; "/>
<norm attr="   foo&lt;bar   "/>
<norm attr="  foobar&lt;"/>
<norm attr="&lt;foo bar "/>
<norm attr="foobar  &lt;"/>
<norm attr="  &#13;&#10;&#9; "/>
<!-- normalization -->
<normId attr=""/>
<normId attr="foo bar"/>
<normId attr="foobar"/>
<normId attr="foo bar"/>
<normId attr="foobar"/>
<normId attr="&amp;"/>
<normId attr="foo&amp;bar"/>
<normId attr="foobar&amp;"/>
<normId attr="&amp;foo bar"/>
<normId attr="foobar &amp;"/>
<normId attr="&lt;"/>
<normId attr="foo&lt;bar"/>
<normId attr="foobar&lt;"/>
<normId attr="&lt;foo bar"/>
<normId attr="foobar &lt;"/>
<normId attr="&#13;&#10;&#9;"/> <!-- PBM serializing back -->

</doc>