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>
    <logevents lecontinue="20201118120707|51910" />
  </query-continue>
  <query>
    <logevents>
      <item logid="51920" ns="0" title="PXV:PXC DrawToDeviceFlags" pageid="5097" logpage="5097" type="patrol" action="patrol" user="Socrat" timestamp="2021-09-01T15:25:48Z" comment="">
        <patrol cur="52398" prev="50093" auto="1" />
      </item>
      <item logid="51919" ns="0" title="PXV:IPXC Page DrawToDevice" pageid="1227" logpage="1227" type="patrol" action="patrol" user="Socrat" timestamp="2021-09-01T15:14:47Z" comment="">
        <patrol cur="52397" prev="34951" auto="1" />
      </item>
      <item logid="51918" ns="0" title="PXV:op document cropPages Options" pageid="5253" logpage="5253" type="patrol" action="patrol" user="Palamar" timestamp="2021-06-29T08:35:58Z" comment="">
        <patrol cur="52396" prev="50893" auto="1" />
      </item>
      <item logid="51917" ns="0" title="PXV:op document addBackground Options" pageid="5237" logpage="5237" type="patrol" action="patrol" user="Palamar" timestamp="2021-04-27T13:25:08Z" comment="">
        <patrol cur="52395" prev="47722" auto="1" />
      </item>
      <item logid="51916" ns="0" title="PXV:op annots setProps" pageid="5204" logpage="5204" type="patrol" action="patrol" user="Palamar" timestamp="2021-01-29T13:32:23Z" comment="">
        <patrol cur="52394" prev="49498" auto="1" />
      </item>
      <item logid="51915" ns="0" title="PXV:UIX Enumerations" pageid="5170" logpage="5170" type="patrol" action="patrol" user="Dsbot" timestamp="2020-11-18T12:07:30Z" comment="">
        <patrol cur="52393" prev="52337" auto="1" />
      </item>
      <item logid="51914" ns="0" title="PXV:UIX Interfaces" pageid="5169" logpage="5169" type="patrol" action="patrol" user="Dsbot" timestamp="2020-11-18T12:07:26Z" comment="">
        <patrol cur="52392" prev="52336" auto="1" />
      </item>
      <item logid="51913" ns="0" title="PXV:PXV Structures" pageid="5168" logpage="5168" type="patrol" action="patrol" user="Dsbot" timestamp="2020-11-18T12:07:21Z" comment="">
        <patrol cur="52391" prev="52335" auto="1" />
      </item>
      <item logid="51912" ns="0" title="PXV:PXV Enumerations" pageid="5167" logpage="5167" type="patrol" action="patrol" user="Dsbot" timestamp="2020-11-18T12:07:18Z" comment="">
        <patrol cur="52390" prev="52334" auto="1" />
      </item>
      <item logid="51911" ns="0" title="PXV:PXV Interfaces" pageid="5166" logpage="5166" type="patrol" action="patrol" user="Dsbot" timestamp="2020-11-18T12:07:13Z" comment="">
        <patrol cur="52389" prev="52333" auto="1" />
      </item>
    </logevents>
  </query>
</api>