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>
    <querypage qpoffset="10" />
  </query-continue>
  <query>
    <querypage name="Ancientpages">
      <results>
        <page value="20110810155707" timestamp="2011-08-10T15:57:07Z" ns="0" title="Main Page" />
        <page value="20140523171131" timestamp="2014-05-23T17:11:31Z" ns="0" title="FacilPos/Archivo/Clientes" />
        <page value="20140529152252" timestamp="2014-05-29T15:22:52Z" ns="0" title="FacilPOS/Reportes/Compras por Productos" />
        <page value="20140529153712" timestamp="2014-05-29T15:37:12Z" ns="0" title="FacilPOS/Reportes/Ventas por Producto" />
        <page value="20140529170953" timestamp="2014-05-29T17:09:53Z" ns="0" title="FacilPOS/Comprobantes/Inicio de Caja" />
        <page value="20140529205050" timestamp="2014-05-29T20:50:50Z" ns="0" title="FacilPOS/Comprobantes/Cheques de Ventas" />
        <page value="20140529224325" timestamp="2014-05-29T22:43:25Z" ns="0" title="FacilPOS/Consultas/Comprobantes de Consignaciones" />
        <page value="20140529224405" timestamp="2014-05-29T22:44:05Z" ns="0" title="FacilPOS/Consultas/Consignaciones por Cliente" />
        <page value="20140529224510" timestamp="2014-05-29T22:45:10Z" ns="0" title="FacilPOS/Comprobantes/Anulación de Letras" />
        <page value="20140529225617" timestamp="2014-05-29T22:56:17Z" ns="0" title="FacilPOS/Consultas/Consignaciones por Producto" />
      </results>
    </querypage>
  </query>
</api>