Data Model - example document

<CD publisher="Deutsche Grammophon"
    length="PT1H13M37S" >
  <composer>Johannes Brahms</composer>
  <performance>
    <composition>Piano Concerto No. 2</composition>
    <soloist>Emil Gilels</soloist>
    <orchestra>Berlin Philharmonic</orchestra>
    <conductor>Eugen Jochum</conductor>
  </performance>
  <performance>
    <composition>Fantasias Op. 116</composition>
    <soloist>Emil Gilels</soloist>
  </performance>
</CD>

• note that the CD element now has two attributes