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-continue>
    <pageswithprop gpwpcontinue="1276" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1210" ns="0" title="Redaktions-News 2006" contentmodel="wikitext" pagelanguage="de" touched="2014-01-03T22:32:15Z" lastrevid="10352" counter="18478" length="25447" />
      <page pageid="1211" ns="0" title="Redaktions-News 2005" contentmodel="wikitext" pagelanguage="de" touched="2014-01-01T14:09:57Z" lastrevid="10353" counter="13479" length="44164" />
      <page pageid="1212" ns="0" title="Redaktions-News 2004" contentmodel="wikitext" pagelanguage="de" touched="2014-01-01T14:09:57Z" lastrevid="10354" counter="13282" length="11756" />
      <page pageid="1213" ns="0" title="Redaktions-News 2003" contentmodel="wikitext" pagelanguage="de" touched="2014-01-01T14:09:57Z" lastrevid="10355" counter="14593" length="21620" />
      <page pageid="1214" ns="0" title="Redaktions-News 2002" contentmodel="wikitext" pagelanguage="de" touched="2014-01-01T14:09:57Z" lastrevid="10356" counter="15235" length="34317" />
      <page pageid="1215" ns="0" title="Redaktions-News 2001" contentmodel="wikitext" pagelanguage="de" touched="2014-01-01T14:09:57Z" lastrevid="10357" counter="14065" length="15047" />
      <page pageid="1216" ns="0" title="Redaktions-News 2000" contentmodel="wikitext" pagelanguage="de" touched="2014-01-01T14:09:57Z" lastrevid="10358" counter="11273" length="280" />
      <page pageid="1273" ns="0" title="2004" contentmodel="wikitext" pagelanguage="de" touched="2018-01-10T21:10:20Z" lastrevid="10420" counter="15660" length="1185" />
      <page pageid="1274" ns="0" title="2000" contentmodel="wikitext" pagelanguage="de" touched="2018-01-10T21:10:20Z" lastrevid="13334" counter="18758" length="630" />
      <page pageid="1275" ns="0" title="2001" contentmodel="wikitext" pagelanguage="de" touched="2018-01-10T21:10:20Z" lastrevid="13337" counter="25361" length="674" />
    </pages>
  </query>
</api>