You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information.
<?xml version="1.0"?>
<api>
  <query>
    <general mainpage="Welcome to Citizendium" base="http://en.citizendium.org/wiki/Welcome_to_Citizendium" sitename="Citizendium, the Citizens&#039; Compendium" logo="http://en.citizendium.org/images/skinlogos/czlogo.png" generator="MediaWiki 1.24.1" phpversion="5.3.3" phpsapi="apache2handler" dbtype="postgres" dbversion="9.4.8" imagewhitelistenabled="" langconversion="" titleconversion="" linkprefixcharset="" linkprefix="" linktrail="/^([a-z]+)(.*)$/sD" git-hash="9ef21a6527140c6df11e3293d58b5589e80c18b2" git-branch="master" case="first-letter" lang="en" fallback8bitEncoding="windows-1252" writeapi="" timezone="UTC" timeoffset="0" articlepath="/wiki/$1" scriptpath="" script="/wiki" server="http://en.citizendium.org" servername="en.citizendium.org" wikiid="cz" time="2019-06-26T14:03:26Z" maxuploadsize="104857600" favicon="http://en.citizendium.org/images/favicon.ico">
      <fallback />
      <thumblimits>
        <limit>120</limit>
        <limit>150</limit>
        <limit>180</limit>
        <limit>200</limit>
        <limit>250</limit>
        <limit>300</limit>
      </thumblimits>
      <imagelimits>
        <limit width="320" height="240" />
        <limit width="640" height="480" />
        <limit width="800" height="600" />
        <limit width="1024" height="768" />
        <limit width="1280" height="1024" />
      </imagelimits>
    </general>
    <namespaces>
      <ns id="-2" case="first-letter" canonical="Media" xml:space="preserve">Media</ns>
      <ns id="-1" case="first-letter" subpages="" canonical="Special" xml:space="preserve">Special</ns>
      <ns id="0" case="first-letter" subpages="" content="" xml:space="preserve" />
      <ns id="1" case="first-letter" subpages="" canonical="Talk" xml:space="preserve">Talk</ns>
      <ns id="2" case="first-letter" subpages="" canonical="User" xml:space="preserve">User</ns>
      <ns id="3" case="first-letter" subpages="" canonical="User talk" xml:space="preserve">User talk</ns>
      <ns id="4" case="first-letter" subpages="" canonical="Project" xml:space="preserve">Citizendium Pilot</ns>
      <ns id="5" case="first-letter" subpages="" canonical="Project talk" xml:space="preserve">Citizendium Pilot Talk</ns>
      <ns id="6" case="first-letter" canonical="File" xml:space="preserve">File</ns>
      <ns id="7" case="first-letter" subpages="" canonical="File talk" xml:space="preserve">File talk</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 talk</ns>
      <ns id="10" case="first-letter" subpages="" canonical="Template" xml:space="preserve">Template</ns>
      <ns id="11" case="first-letter" subpages="" canonical="Template talk" xml:space="preserve">Template talk</ns>
      <ns id="12" case="first-letter" subpages="" canonical="Help" xml:space="preserve">Help</ns>
      <ns id="13" case="first-letter" subpages="" canonical="Help talk" xml:space="preserve">Help talk</ns>
      <ns id="14" case="first-letter" canonical="Category" xml:space="preserve">Category</ns>
      <ns id="15" case="first-letter" subpages="" canonical="Category talk" xml:space="preserve">Category talk</ns>
      <ns id="100" case="first-letter" subpages="" canonical="CZ" xml:space="preserve">CZ</ns>
      <ns id="101" case="first-letter" subpages="" canonical="CZ Talk" xml:space="preserve">CZ Talk</ns>
      <ns id="102" case="first-letter" subpages="" canonical="TI" xml:space="preserve">TI</ns>
      <ns id="103" case="first-letter" subpages="" canonical="TI Talk" xml:space="preserve">TI Talk</ns>
      <ns id="104" case="first-letter" subpages="" canonical="WYA" xml:space="preserve">WYA</ns>
      <ns id="105" case="first-letter" subpages="" canonical="WYA Talk" xml:space="preserve">WYA Talk</ns>
      <ns id="106" case="first-letter" canonical="Forum" xml:space="preserve">Forum</ns>
      <ns id="107" case="first-letter" canonical="Forum Talk" xml:space="preserve">Forum Talk</ns>
      <ns id="274" case="first-letter" canonical="Widget" xml:space="preserve">Widget</ns>
      <ns id="275" case="first-letter" subpages="" canonical="Widget talk" xml:space="preserve">Widget talk</ns>
    </namespaces>
    <namespacealiases>
      <ns id="6" xml:space="preserve">Image</ns>
      <ns id="7" xml:space="preserve">Image talk</ns>
    </namespacealiases>
    <statistics pages="178359" articles="75153" edits="856127" images="10940" users="9838" activeusers="6" admins="7" jobs="163" />
  </query>
</api>