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="98_AN_5.2_MT_FED_56046332AG.bin" />
  </query-continue>
  <query>
    <pages>
      <page pageid="28" ns="6" title="File:52.bin" />
      <page pageid="29" ns="6" title="File:52 MP.bin">
        <duplicatefiles>
          <df name="98_59_jgc.bin" user="JTEC" timestamp="2013-08-13T03:35:43Z" />
        </duplicatefiles>
      </page>
      <page pageid="30" ns="6" title="File:59.bin" />
      <page pageid="23" ns="6" title="File:96 BR 5.9 A4 04886919.bin" />
      <page pageid="38" ns="6" title="File:97JTEC2.xdf" />
      <page pageid="24" ns="6" title="File:97 BT 5.2 Regulated A3 04852984AA.bin" />
      <page pageid="25" ns="6" title="File:97 BT 5.2 Regulated MT 04852983AA.bin" />
      <page pageid="22" ns="6" title="File:97 JTEC Internal anotated.jpg" />
      <page pageid="31" ns="6" title="File:98 59 jgc.bin">
        <duplicatefiles>
          <df name="52_MP.bin" user="JTEC" timestamp="2013-08-13T03:32:52Z" />
        </duplicatefiles>
      </page>
      <page pageid="26" ns="6" title="File:98 AN 5.2 MT CAL 56046329AG.bin" />
    </pages>
  </query>
</api>