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>
    <allpages apcontinue="SRC" />
  </query-continue>
  <query>
    <allpages>
      <p pageid="98" ns="0" title="Databases" />
      <p pageid="3" ns="0" title="JEG-Hybrid cfp" />
      <p pageid="71" ns="0" title="JEG HEVC DB analysis" />
      <p pageid="100" ns="0" title="JEG Reproducible Video Quality Analysis Framework" />
      <p pageid="4" ns="0" title="JEG no-reference hybrid H264" />
      <p pageid="60" ns="0" title="JEG no-reference hybrid HEVC" />
      <p pageid="97" ns="0" title="List of Publications" />
      <p pageid="1" ns="0" title="Main Page" />
      <p pageid="96" ns="0" title="MySQL processing database" />
      <p pageid="93" ns="0" title="RobustDecoder" />
    </allpages>
  </query>
</api>