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" encoding="utf-8"?>
<api>
  <query-continue>
    <exturlusage euoffset="10" />
  </query-continue>
  <query>
    <exturlusage>
      <eu pageid="100102791" ns="100" title="CZ:Proposals/Driverless/Archive 1" url="http://www.mediawiki.org" />
      <eu pageid="100057082" ns="3" title="User talk:Derek Harkness/Skin" url="http://www.mediawiki.org/" />
      <eu pageid="100114366" ns="3" title="User talk:RICARDO Gomes de Paiva DE FARIA" url="http://www.mediawiki.org/w/index.php?title=Extension:PreferencesExtension&amp;action=edit&amp;section=4" />
      <eu pageid="100067499" ns="2" title="User:Daniel Mietchen/Notes to self" url="http://www.mediawiki.org/w/index.php?title=User:Alterego/ExtensionMatrix/Source_code&amp;oldid=274613" />
      <eu pageid="100067499" ns="2" title="User:Daniel Mietchen/Notes to self" url="http://www.mediawiki.org/wiki/Category:All_extensions" />
      <eu pageid="100081126" ns="2" title="User:Pat Palmer/Abc notation" url="http://www.mediawiki.org/wiki/Extension:AbcMusic" />
      <eu pageid="100067499" ns="2" title="User:Daniel Mietchen/Notes to self" url="http://www.mediawiki.org/wiki/Extension:Assert_Edit" />
      <eu pageid="100067499" ns="2" title="User:Daniel Mietchen/Notes to self" url="http://www.mediawiki.org/wiki/Extension:BibTexImport" />
      <eu pageid="100067499" ns="2" title="User:Daniel Mietchen/Notes to self" url="http://www.mediawiki.org/wiki/Extension:Bibwiki" />
      <eu pageid="100061394" ns="3" title="User talk:Chris Day/Archive 5" url="http://www.mediawiki.org/wiki/Extension:CSS_Dropdowns" />
    </exturlusage>
  </query>
</api>