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="Lin-Cyber_Conflict_and_National_Security_2012.pdf" />
  </query-continue>
  <query>
    <pages>
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      <page pageid="271" ns="6" title="File:All articles.svg" />
      <page pageid="272" ns="6" title="File:All articles2.svg" />
      <page pageid="273" ns="6" title="File:All articles3.svg" />
      <page pageid="274" ns="6" title="File:Case studies.svg" />
      <page pageid="275" ns="6" title="File:H2o icon.svg" />
      <page pageid="276" ns="6" title="File:Help icon.svg">
        <duplicatefiles>
          <df name="Help_icon2.svg" user="Gili" timestamp="2012-08-06T14:56:30Z" />
          <df name="Help_icon3.svg" user="Gili" timestamp="2012-08-06T14:59:00Z" />
        </duplicatefiles>
      </page>
      <page pageid="277" ns="6" title="File:Help icon2.svg">
        <duplicatefiles>
          <df name="Help_icon.svg" user="Gili" timestamp="2012-08-06T14:54:22Z" />
          <df name="Help_icon3.svg" user="Gili" timestamp="2012-08-06T14:59:00Z" />
        </duplicatefiles>
      </page>
      <page pageid="278" ns="6" title="File:Help icon3.svg">
        <duplicatefiles>
          <df name="Help_icon.svg" user="Gili" timestamp="2012-08-06T14:54:22Z" />
          <df name="Help_icon2.svg" user="Gili" timestamp="2012-08-06T14:56:30Z" />
        </duplicatefiles>
      </page>
      <page pageid="279" ns="6" title="File:Help icon4.svg" />
    </pages>
  </query>
</api>