You are looking at the HTML representation of the XML format.
HTML is good for debugging, but probably is not suitable for your application.
See complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query>
    <allpages>
      <p pageid="573" ns="0" title="Beefree" />
      <p pageid="267" ns="0" title="BluePay" />
      <p pageid="279" ns="0" title="CasperJSS FileMaker Plugin/Documentation" />
      <p pageid="657" ns="0" title="Celero" />
      <p pageid="242" ns="0" title="Channel Advisor WebServices Plugin/Documentation" />
      <p pageid="327" ns="0" title="CloudMail" />
      <p pageid="17" ns="0" title="Common issues" />
      <p pageid="309" ns="0" title="Configuring IIS for MirrorSync over SSL" />
      <p pageid="32" ns="0" title="Creating Custom Menus in FileMaker Pro Advanced" />
      <p pageid="35" ns="0" title="Custom SSL Certificate setup instructions" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="Delete Sync Data" />
  </query-continue>
</api>