gistfile1.txt

  <product>
    <a001>KNV1972090700076</a001>
    <a002>04</a002>
    <a194>03</a194>
    <a197>KNV</a197>
    <productidentifier>
      <b221>03</b221>
      <b244>9783150047552</b244>
    </productidentifier>
    <productidentifier>
      <b221>01</b221>
      <b233>KNV</b233>
      <b244>747</b244>
    </productidentifier>
    <b012>BC</b012>
    <productclassification>
      <b274>01</b274>
      <b275>49019900009</b275>
    </productclassification>

...
...
  </product>