This is Valid XML
<!DOCTYPE HTML 
[ <!ELEMENT HTML       (title, p+)>
  <!ELEMENT title      (#PCDATA)>
  <!ELEMENT p          (#PCDATA|Instrument|IMG)*>
  <!ELEMENT Instrument (#PCDATA)>
  <!ELEMENT IMG        EMPTY>
  <!ATTLIST IMG        src CDATA #REQUIRED>
  <!ENTITY  nbsp       "&#xa0;"> ]>
<HTML><title>Suite in F</title>
<p>This work of J.S.&nbsp;Bach is written to be played, 
not on the modern cello, but on the much softer-toned 
<Instrument>viola da gamba</Instrument>.</p>
<p>An italian specimen of 1532: 
<IMG src='vdg.jpg' />
</p></HTML>
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