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_DataPoints.png|1137" />
  </query-continue>
  <query>
    <pages>
      <page pageid="588" ns="0" title="Examples of Controlling Equipment of the KNX Bus via KNX IP BAOS" />
      <page pageid="609" ns="0" title="Basic Operation of iRidium with the KNX Bus Equipment via KNX IP BAOS" />
      <page pageid="694" ns="0" title="Switching from iRidium 1.5 to 2.0" />
      <page pageid="1137" ns="0" title="Setting up Connection to KNX IP BAOS via Object Server Datapoints" />
    </pages>
  </query>
</api>