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>
    <allfileusages gafcontinue="BAOS_device_config_SetRelations.png" />
  </query-continue>
  <query>
    <pages>
      <page pageid="1141" ns="6" title="File:BAOS add channel F2 button.png" />
      <page pageid="589" ns="6" title="File:BAOS add command Relay 1.png" />
      <page pageid="590" ns="6" title="File:BAOS bind the command relay on off.png" />
      <page pageid="612" ns="6" title="File:BAOS channel and commands properties.png" />
      <page pageid="1139" ns="6" title="File:BAOS connection settings.png" />
      <page pageid="1140" ns="6" title="File:BAOS connection settings ext.png" />
      <page pageid="610" ns="6" title="File:BAOS creation of gateways and channels.png" />
      <page pageid="729" ns="6" title="File:BAOS device config DataPoints.png" />
      <page pageid="731" ns="6" title="File:BAOS device config General.png" />
      <page pageid="730" ns="6" title="File:BAOS device config IPConfiguration.png" />
    </pages>
  </query>
</api>