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="3" ns="0" title="Core Java" />
      <p pageid="205" ns="0" title="Design patterns" />
      <p pageid="206" ns="0" title="Design patterns. Builder" />
      <p pageid="208" ns="0" title="Design patterns. Builder. Agent007 Builder" />
      <p pageid="207" ns="0" title="Design patterns. Builder. Robot Builder" />
      <p pageid="57" ns="0" title="FTP" />
      <p pageid="53" ns="0" title="FreeBSD" />
      <p pageid="200" ns="0" title="Git" />
      <p pageid="202" ns="0" title="Git. Branch" />
      <p pageid="201" ns="0" title="Git. Delete branch" />
    </allpages>
  </query>
  <query-continue>
    <allpages apfrom="Git. Gitignore" />
  </query-continue>
</api>