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>
    <allredirects arcontinue="OPCServer:Operation_with_User_rights" />
  </query-continue>
  <query>
    <allredirects>
      <r ns="0" title="IBHLink S5++:SIMATIC® S5 Elipse SCADA" />
      <r ns="0" title="IBHLink S5++:SIMATIC® S5 PLC PcVue" />
      <r ns="0" title="IBHLink S7++:S7-200 WinCC flexible" />
      <r ns="0" title="IBHLink S7++:S7-300/S7-400 Elipse SCADA" />
      <r ns="0" title="IBHLink S7++:S7-300/S7-400 PcVue" />
      <r ns="0" title="IBHNet:System Requirements" />
      <r ns="0" title="OPCServer:Create Variables manually with Intouch" />
      <r ns="0" title="OPCServer:Create Variables with Intouch TagCreator" />
      <r ns="0" title="OPCServer:DCOM Configuration" />
      <r ns="0" title="OPCServer:Licensing" />
    </allredirects>
  </query>
</api>