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="Hlavní strana" base="http://maturitait4.iunas.cz/index.php?title=Hlavn%C3%AD_strana" sitename="Maturita 2012" generator="MediaWiki 1.18.1" phpversion="5.6.40-81+0~20250311.98+debian12~1.gbp4564f4" phpsapi="fpm-fcgi" dbtype="sqlite" dbversion="3.40.1" case="first-letter" rights="" lang="cs" fallback8bitEncoding="cp1250" writeapi="" timezone="Europe/Prague" timeoffset="120" articlepath="/index.php?title=$1" scriptpath="" script="/index.php" variantarticlepath="" server="http://maturitait4.iunas.cz" wikiid="maturita2012_wiki" time="2025-04-23T13:48:00Z" />
    <namespaces>
      <ns id="-2" case="first-letter" canonical="Media" xml:space="preserve">Média</ns>
      <ns id="-1" case="first-letter" canonical="Special" xml:space="preserve">Speciální</ns>
      <ns id="0" case="first-letter" content="" xml:space="preserve" />
      <ns id="1" case="first-letter" subpages="" canonical="Talk" xml:space="preserve">Diskuse</ns>
      <ns id="2" case="first-letter" subpages="" canonical="User" xml:space="preserve">Uživatel</ns>
      <ns id="3" case="first-letter" subpages="" canonical="User talk" xml:space="preserve">Diskuse s uživatelem</ns>
      <ns id="4" case="first-letter" canonical="Project" xml:space="preserve">Maturita 2012</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">Diskuse k Maturita 2012</ns>
      <ns id="6" case="first-letter" canonical="File" xml:space="preserve">Soubor</ns>
      <ns id="7" case="first-letter" subpages="" canonical="File talk" xml:space="preserve">Diskuse k souboru</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">Diskuse k MediaWiki</ns>
      <ns id="10" case="first-letter" canonical="Template" xml:space="preserve">Šablona</ns>
      <ns id="11" case="first-letter" subpages="" canonical="Template talk" xml:space="preserve">Diskuse k šabloně</ns>
      <ns id="12" case="first-letter" canonical="Help" xml:space="preserve">Nápověda</ns>
      <ns id="13" case="first-letter" subpages="" canonical="Help talk" xml:space="preserve">Diskuse k nápovědě</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">Diskuse ke kategorii</ns>
    </namespaces>
    <namespacealiases>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
      <ns id="2" xml:space="preserve">Uživatelka</ns>
      <ns id="3" xml:space="preserve">Diskuse s uživatelkou</ns>
      <ns id="3" xml:space="preserve">Uživatel diskuse</ns>
      <ns id="3" xml:space="preserve">Uživatelka diskuse</ns>
      <ns id="7" xml:space="preserve">Soubor diskuse</ns>
      <ns id="9" xml:space="preserve">MediaWiki diskuse</ns>
      <ns id="11" xml:space="preserve">Šablona diskuse</ns>
      <ns id="13" xml:space="preserve">Nápověda diskuse</ns>
      <ns id="15" xml:space="preserve">Kategorie diskuse</ns>
      <ns id="5" xml:space="preserve">Maturita 2012 diskuse</ns>
    </namespacealiases>
    <statistics pages="146" articles="11" views="1303114" edits="1489" images="51" users="21" activeusers="0" admins="1" jobs="0" />
  </query>
</api>