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>
    <general mainpage="Hauptseite" base="http://www.wundwiki.de/index.php?title=Hauptseite" sitename="WundWiki" generator="MediaWiki 1.18.0" phpversion="5.3.29" phpsapi="cgi-fcgi" dbtype="mysql" dbversion="5.5.5-10.0.38-MariaDB-0+deb8u1" case="first-letter" rights="" lang="de" fallback8bitEncoding="windows-1252" writeapi="" timezone="Europe/Berlin" timeoffset="60" articlepath="/index.php?title=$1" scriptpath="" script="/index.php" variantarticlepath="" server="http://www.wundwiki.de" wikiid="db_wundwiki" time="2024-10-30T12:55:49Z" />
    <namespaces>
      <ns id="-2" case="first-letter" canonical="Media" xml:space="preserve">Medium</ns>
      <ns id="-1" case="first-letter" canonical="Special" xml:space="preserve">Spezial</ns>
      <ns id="0" case="first-letter" content="" xml:space="preserve" />
      <ns id="1" case="first-letter" subpages="" canonical="Talk" xml:space="preserve">Diskussion</ns>
      <ns id="2" case="first-letter" subpages="" canonical="User" xml:space="preserve">Benutzer</ns>
      <ns id="3" case="first-letter" subpages="" canonical="User talk" xml:space="preserve">Benutzer Diskussion</ns>
      <ns id="4" case="first-letter" canonical="Project" xml:space="preserve">WundWiki</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">WundWiki Diskussion</ns>
      <ns id="6" case="first-letter" canonical="File" xml:space="preserve">Datei</ns>
      <ns id="7" case="first-letter" subpages="" canonical="File talk" xml:space="preserve">Datei Diskussion</ns>
      <ns id="8" case="first-letter" subpages="" canonical="MediaWiki" xml:space="preserve">MediaWiki</ns>
      <ns id="9" case="first-letter" subpages="" canonical="MediaWiki talk" xml:space="preserve">MediaWiki Diskussion</ns>
      <ns id="10" case="first-letter" canonical="Template" xml:space="preserve">Vorlage</ns>
      <ns id="11" case="first-letter" subpages="" canonical="Template talk" xml:space="preserve">Vorlage Diskussion</ns>
      <ns id="12" case="first-letter" canonical="Help" xml:space="preserve">Hilfe</ns>
      <ns id="13" case="first-letter" subpages="" canonical="Help talk" xml:space="preserve">Hilfe Diskussion</ns>
      <ns id="14" case="first-letter" canonical="Category" xml:space="preserve">Kategorie</ns>
      <ns id="15" case="first-letter" subpages="" canonical="Category talk" xml:space="preserve">Kategorie Diskussion</ns>
    </namespaces>
    <namespacealiases>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
      <ns id="6" xml:space="preserve">Bild</ns>
      <ns id="7" xml:space="preserve">Bild Diskussion</ns>
      <ns id="2" xml:space="preserve">Benutzerin</ns>
      <ns id="3" xml:space="preserve">Benutzerin Diskussion</ns>
    </namespacealiases>
    <statistics pages="760" articles="22" views="2864084" edits="1998" images="1" users="893" activeusers="0" admins="12" jobs="0" />
  </query>
</api>