You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allimages gaicontinue="AW_Graaris_w230.jpg" />
  </query-continue>
  <query>
    <pages>
      <page pageid="64" ns="6" title="Fil:1 plantoer aalund.jpg" />
      <page pageid="63" ns="6" title="Fil:2 plantoer schytte.jpg" />
      <page pageid="274" ns="6" title="Fil:AW Almindelig maelkeurt w230.jpg" />
      <page pageid="283" ns="6" title="Fil:AW Almindelig roellike w230.jpg" />
      <page pageid="297" ns="6" title="Fil:AW Bakkeoegelilje w230.jpg" />
      <page pageid="290" ns="6" title="Fil:AW Bjergroerhvene w230.jpg" />
      <page pageid="280" ns="6" title="Fil:AW Blaaklokke w230.jpg" />
      <page pageid="281" ns="6" title="Fil:AW Blaamunke w230.jpg" />
      <page pageid="291" ns="6" title="Fil:AW Boelget bunke w230.jpg" />
      <page pageid="284" ns="6" title="Fil:AW Gederams w230.jpg" />
    </pages>
  </query>
</api>